Ace Group Fitness Quizzes

Side plank

During which of the following exercises is the quadrates lumborum engaged as a primary muscle for performing the exercise?

Overtraining

A group fitness instructor notices that for the past few weeks she has been experiencing an increased resting heart rate, sleep loss, fatigue. Based on these symptoms, what is the instructor MOST LIKELY experiencing?

Autonomous

A yoga teacher notices that a new participant in class moves easily into each pose the first time it is announced. This participant appears to be in which stage of learning yoga?

Class Objectives

After the general goal for a group fitness class is established, what should an ACE Certified Group Fitness Instructor focus on next?

Modality certificate

Attending a one-day workshop focused on teaching indoor cycling BEST describes which of the following types of credentials?

32

Square music is typically organized into how many count phrases?

Provide a safe environment for all participants

What is the PRIMARY objective for group fitness instructors?

Curriculum-based certificate

What is the correct term for a credential Comprised of a course or series of courses on a specific topic with an end of course assessment?

0.8 to 1.0 g/kg of body weight

What is the daily protein requirement for an average person?

Carbohydrates: 45-65%, Protein: 10-35%, Fat: 20-35%

What is the for adults for percentage of calories from carbohydrates, proteins and fats?

15-20

What is the recommended repetition range for resistance exercises to improve muscular endurance?

Triceps brachii

What muscle extends the elbow joint?

At the beginning of the conditioning segment, Immediately after the warm-up.

When is the best time to incorporate plyometric exercises into a sports conditioning class?

They must feel specific cues

Which BEST describes the cueing needs of kinesthetic learners?

Stroke

Which of the following emergencies is caused by a lack of blood supply and oxygen to the brain?

Blood glucose levels should be checked after exercise

Which of the following is RECOMMENDED for people who have diabetes?

Deconditioned Participants

Which of the following is an intrinsic risk factor that group fitness instructors should be aware of and prepared for when teaching a class of diverse participants?

Enjoy food, but eat fewer calories

Which of the following is encouraged by MyPlate (www.choosemyplate.gov)

An instructor placing a hand above a participants low back during a plank exercise and then asking the participant to pull up toward the hand

Which of the following is na example of a landmark cue?

Instruct participants to imagine their glues touching a chair as they lower into the squat, and squeeze their glues on the way up

Which of the following is the BEST cue for kinesthetic learner performing a squat?

Instructors follow a written script with music, cues and moves outlined from start to finish.

Which of the following is the BEST description of a pre-choreographed class?

The use of ratings of perceived exertion (RPE) scale to monitor exercise intensity

Which of the following is the MOST appropriate exercise recommendation for a pregnant participant?

Lumbar spine

Which of the following joints is considered to be a section of kinetic chain that favors stability over mobility?

Middle Trapezius

Which of the following muscles is responsible for adduction of the scapulae?

The instructor should obtain his or her own license for the music used

Which of the following options is MOST appropriate for an instructor who teaches at multiple locations?

Stagger arrangment

Which of the following participant arrangements is Most appropriate for a dance-based group fitness class?

Horizontal line

Which of the following participant arrangements is most appropriate for an instructor to see everyones movement and coordination pattern in a synchronized fashion from all angles?

Extend the warm-up and cool down class segments (10 mins)

Which of the following should be included in group fitness classes specifically designed for older adults?

Gradually redistributing blood flow to the working muscles.

A warm-up should include which of the following goals?

Offer to place a palm in the specific place to where the individual should move in order to teach the feeling of proper alignment

After offering several verbal feedback cues, the group fitness instructor realizes that a participant is still having difficulties and may need kinesthetic cues to correct improper form. What would be the MOST appropriate technique to use in this situation?

After registering for an ACE certification exam.

At what point is an individual FIRST responsible for adhering to the ACE Code of Ethics?

45 g to 158 g

Based on the range recommendations in Acceptable Macronutrient Distribution Range (ADMR), how many grams of protein should be consumed daily by an adult who consumes an adverse of 1,800 calories per day?

Introduce yourself and ask them their names

Before your indoor cycling class, you notice tow new students on bike int he back row, What would be the BEST course of action to begin establishing rapport?

Syncopation

During a step-training class, the instructor decides to progress a grapevine movement sequence by having participants hold the lead leg for two counts and then perform the rest of the movement more quickly. this is an example of?

Soften your knees (when using corrective cues, they should be positive and solution based. provide one cue at a time instead of multiple correct one thing first)

During the strength-training component of a conditioning class, a participant is standing with locked knees and an exaggerated lumbar curve. which of the following feedback is appropriate

During the upward movement of the shoulder press

During what portion of shoulder press should the group fitness instructor cue participants to exhale?

Preperation

A member at a fitness facility approaches an ACE Group Fitness Instructor to inquire about the various classes on the group fitness schedule. She says that years ago she was a competitive swimmer in college, but that she has not had much experience with group fitness classes. She is a new member and is looking for guidance to help her get started with her fitness program. Based on this information, in what stage of the transtheoretical model of behavior change would this member be classified?

A low- to moderate- intensity circuit class during the lunch hour

A new member has been coming to the gym during the lunch hour.she enjoys it and asks which class you would recommend for her?

Negligence

"Failure to act as a reasonable and prudent person would act under a similar circumstance" is a definition for what legal term?

Progression from extrinsic motivation to Intrinsic motivation

A newer participant began taking one group fitness class there days per week as part of a fitness challenge help at the club, and is continuing because he really enjoys it. which of the following best describes this scenario?

Decrease the music level for the next class

A participant approaches a group fitness instructor after class to let the instructor know that the music was o loud. in addition to the thinning the participant for the feedback, what is MOST appropriate course of action for the instructor to take?

Balance activities (maintaining or improving muscular balance across joints is particularly important for people with osteoporosis)

A participant informs an ACE GROUP FITNESS INSTRUCTOR that she has osteoporosis, primarily in her axial skeleton. which is her physician MOST like to suggest?

Intrinsic

A participant who feels that his or her hip dipping the birddog exercise and makes an adjustment based on this feeling is demonstrating which type of feedback?

54 calories from fat

A food label shows that the food 8 servings per container, 90 calories per serving, and 2 grams of fat per serving. If an individual eats 3 servings of food, what is the total number of calories from fat consumed?

Zone 2

A group fitness instructor asks the class a question and notices that MOST participants can respond, but talking is a little challenging. Based on this observation, in what zone of the three-zone intensity model are the participants currently exercising?

Begin searching for a sub instructor for the class

A group fitness instructor finds out that he or she will need a sub instructor in two weeks. what should the instructor do?

Continue to lead the class exercise class while approaching the participant to have him or her sign the waiver before he or she begins exercising

A group fitness instructor notices a new participant who is not on the class roster coming into class five minutes late on the first day of the eight-week group challenge. What is the MOST appropriate approach to get this participant to sign a waiver?

Have the participant stop and rest for at least 10 minutes

A group fitness instructor sees a participant who has asthma begin to wheeze during the conditioning segment of class. What is MOST appropriate immediate course of action?

Dedication

A group fitness instructor who strives to keep classes diverse and enjoyable for participants exhibits which leadership quality?

Practice style of teaching

Encouraging participants to move through a yoga sequence with the freedom to explore variations at a pace the feels right for them BEST describes which style of teaching?

Side lying leg lift

Hip abduction is the primary motion performed during the upward, or lifting, phase of which of the following exercises?

Attend classes taught by other instructors

How can ACE Certified Group Fitness Instructor enhance their teaching abilities?

Erector spinae

Instructing participants to lie prone on their mats and guiding them to slowly lift their chests off the mat to perform a truck hyperextension exercise PRIMARILY targets which oft he following muscles or muscle groups?

Cardiovascular system

Isometric exercises are typically CONTRAINDICATED (not recommended) for clients who have which medical condition?

Lift the chest and slide the shoulder blades down

MOST appropriate verbal feedback to address a participant who performs standing exercises with an excessive curvature of the spine in the thoracic region?

Stage 1 hypertension

In what category would an adult participant with a blood pressure of 136/88 mmHg be classified?

To prepare mentally and physically for the upcoming workout

PRIMARY reason to incorporate rehearsal moves during the warm-up portion of class?

Transitional or reversible

Performing a lateral movement sequence to both the right and the left sides describes which of the following movement patterns?

Bent-over rows

The latissimus doors is a prime mover during which of the following exercises?

Matching

What type of transition is being used when a group fitness instructor has participants perform a grapevine immediately followed by single-leg curls?

Mending

What type of transition is being used when a group fitness instructor has participants perform an overhead press combined with step-up?

Place hands on the wall and lift knees toward the chest

What would be the MOST appropriate regression of a mountain climber exercise for a pregnant participant in her third trimester?

Pair the participants for partner-based exercises so they can share suspension trainers.

When arriving to teach a suspension training class, an ACE Certified Group Fitness Instructor finds threes suspension trainers have been removed. What is the BEST way for the GFI to proceed with class?

25 to 25 degrees of flexion when the foot is at the bottom of the pedal stroke (6 o' clock position)

When helping a participant set up an indoor cycling bike, what is the RECOMMENDED knee position to help ensure that saddle height is appropriate?

Lock them away in the equipment cabinet and alert the manger after class.

When inspecting equipment before class, an ACE Certified Group Fitness Instructor finds small tears in two resistance bands. What is the MOST appropriate action?

Teach on the downbeat when appropriate

When using music int he foreground. It is best to promote inform movements for all class participants?

Health benefits

Which class education strategy is being used when a group fitness instructor teaches participants how to adopt a yoga pose to be done behind a desk to help improve posture?

Step

Which class type would be MOST appropriate for a participant who wants to focus on a cardiorespiratory endurance workout?

Muscular Endurance

Which component of fitness is described as the ability to perform repeated or sustained muscular contractions over a period of time without fatigue?

It often follows guidelines and suggestions of a format

Which description of the pre-planned choreographic method of instruction is MOST accurate?

Estimated Average Requirement (EAR)

Which dietary reference value refers to adequate intake in 50% of an age and gender-specific group?

Seafood

Which for the following foods would MOST appropriate to recommend as an option to a class participant who wants to increase her intake of omega-3 fatty acids?

Compound fracture

Which injury requires activation of the emergency medical system (EMS) in ALL instances?

Incorporate informative cueing off the bike to minimize physical work

Which is MOST appropriate for an ACE Certified Group Fitness Instructor who begins to notice his or her own symptoms of overtraining while leading an indoor cycling class?

Professionalism

Which leadership quality is best described by refraining from gossip and negative comments about others?

Rectus femoris

Which muscle causes knee extension and hip Flexion as its primary joint actions?

Time

Which of following is an environmental factor that influences exercise participation and adherence?

A sharp drop in blood pressure often caused by transitioning from supine or seated position to standing.

Which of the following BEST defines Orthostatic hypotension?

Accreditation awarded to certification programs that meet all NCCA Standards.

Which of the following BEST describes NCCA accreditation?

A certificate designating that an individual has completed a course on a specific topic.

Which of the following BEST describes a certificate received after continuing education?

A credential awarded after verification that an individual has demonstrated the knowledge and skill required to enter a job role

Which of the following BEST describes a professional certification?

An instructor makes all the decisions about posture, rhythm, and duration

Which of the following BEST describes the command style of teaching?

Upward phase of a push-up

Which of the following actions is an example of a concentric contraction?

Activate the emergency medical system (EMS)

Which of the following actions would be MOST appropriate for a Participant in a group fitness class who is experiencing hypoglycemia and then becomes unconscious?

Jogging for 10 mins

Which of the following activities is fueled PRIMARILY via the aerobic system?

Weak, rapid pulse; profuse sweating; dizziness

Which of the following are signs and symptoms of heat exhaustion?

Asthma

Which of the following conditions has symptoms that can be instigated by physical activity?

Songs that match the ambience intended for the class

Which of the following consideration sings is most appropriate when selecting music for a restoration yoga class?

Exercising in the cold may cause an increase in blood pressure.

Which of the following considerations is TRUE about exercising in the cold?

Hot, dry skin

Which of the following could be a sign of a heat stroke requiring immediate medical attention?

March forward, lift the knees high, and alternate reaching the arms overhead

Which of the following cues would result in the GREATEST increase in intensity during a basic march?

Individuals who are sedentary, but are starting to consider activity as being important.

Which of the following describes individuals who are currently in the contemplation stage of the trans theoretical model of behavior change for physical-activity behaviors?

Informed consent form

Which of the following documents should be shared with, and signed by, class participants prior to beginning an exercise program to make them aware of the risks and benefits associated with exercise?

Incorporate movements that extend and lengthen the hip flexors, hamstrings, and upper spine.

Which of the following dynamic warm-up activities is MOST beneficial to individuals who sit at a desk all day?

Breech

Which of the following elements of negligence refers to the act of an instructor failing to provide the requisite standard of care in a group fitness class setting?

Dumbell bicep curls

Which of the following excersises occurs PRIMARILY in sagittal plane?

Grapevines combined with forward and backward marching

Which of the following exercise combinations is an example of balanced program design in group fitness class?

Gentle race of motion (ROM) exercises can be performed during arthritis flare-ups

Which of the following exercise guidelines is MOST appropriate for a participant with osteoarthritis

Birddog

Which of the following exercises has a primary focus on enhancing stability of the lumbar spine?

Standing quadriceps stretch

Which of the following exercises should be included in the post-conditioning cool-down segment of a youth conditioning class to promote flexibility?

Birddog

Which of the following exercises would be MOST important to include in the warm-up segment of sports conditioning class to warm up the muscles of the spine and improve low-back health?

Providing participants with a free trial of a supplemental.

Which of the following falls OUTSIDE the ACE Certified Group Fitness Instructor scope of practice?

Hardwood

Which of the following group exercise surfaces offers good traction for dynamic movement?

60-70% of 1-RM

Which of the following intensity levels is most appropriate for novice to intermediate exercisers seeking to improve their strength?

30 secs or running followed by 1 min of easy jogging

Which of the following intervals BEST represents a 1:2 work to recovery ration?

Beat

Which of the following is BEST described as regular pulsations in music that have even rhythm and occur in a continuous pattern of strong and weak pulsations?

Performing unsupported back hyperextension exercises using a Roman chair in a. circuit-training class

Which of the following is CONTRAINDICATED (not recommended) for individuals who have a history of low-back pain?

Physicians are the "gate keepers" of allied healthcare.

Which of the following is CORRECT regarding the Allied Healthcare Continuum?

Teach and promote many options for self-monitoring with methods such as the talk test

Which of the following is MOST likely to meet the needs of all the different fitness levels within a group class?

Aerobic Q-signs are best suited for visual learners.

Which of the following is TRUE about cueing?

The ingredients are listed in decreasing order of substance weight

Which of the following is TRUE regarding a food label?

Never palpate both of the carotid arteries at the same time.

Which of the following is TRUE regarding heart rate at the carotid pulse?

Lapses should be viewed as challenges that can be overcome.

Which of the following is TRUE regarding lapses?

They should be heard and understood immediately before the movement becomes imminent

Which of the following is TRUE regarding verbal cues?

Themes can be created using music or other areas of focus for the class.

Which of the following is True regarding using themes in group fitness classes?

Shin splints

Which of the following is a CHRONIC condition?

A relationship marked by mutual understanding and trust.

Which of the following is a description of rapport?

Waiver

Which of the following is a document signed by a participant to release the instructor and fitness center from ALL liability associated with the conduct of an exercise program and any resulting injuries?

Consume more oils than solid fats

Which of the following is among the common features of healthy eating patterns?

Confusion

Which of the following is an EARLY symptom of insulin reaction?

"I will attend yoga class twice a week for six weeks"

Which of the following is an example of a SMART goal?

Push-ups, weighted squats, dumbbell rows, alternating body-weight lunges

Which of the following is an example of a balanced exercise sequence for a total-body strength circuit?

Step (choreographed moves to song)

Which of the following is an example of a class that TYPICALLY uses music ONLY in the foreground?

Offering a free T-shirt to participants who attend 10 classes in a month.

Which of the following is an example of an extrinsic reward?

Begin class by asking participants about their favorite exercise in class

Which of the following is an example of enhancing a class blueprint to create memorable experiences?

Removing risers from the step.

Which of the following is an example of example of an exercise regression for a participant in a step class?

Twisting an ankle

Which of the following is an example of the ACUTE injury?

Teaching the movements at half tempo then building to full tempo.

Which of the following is an example of the slow-to-fast teaching strategy?

Inquire about permits needed to offer an instructor led exercise program

Which of the following is the MOST important step before offering an outdoor bootcamp at a local park?

Improper from

Which of the following is the MOST obvious sign of exercise fatigue?

When multiple participants stand with exaggerated kyphosis, the group fitness instructor should include exercises that focus on extending the torso and retracting the scapula.

Which of the following is true about on the spot indicators seen during a group fitness pre-class evaluation?

Educating participants about health-related topics to facilitate long-term success.

Which of the following is within the ACE Certified Group Fitness Instructor scope of practice?

Body-weight squats, dumbbell side raises, standing medicine ball truck rotations.

Which of the following movement sequences include one exercise one each of the three planes of motion?

Raising the arms overhead during a squat exercise

Which of the following provides an example of an exercise progression based on the "LL" in the DRILLS acronym?

Advise her to avoid any inverted postures

Which of the following recommendations is MOST appropriate to give in a hatha yoga class to a pregnant participant in her second trimester?

I will increase buy physical activity to two classes per week and maintain intensity in my target heart-rate range

Which of the following represents the most realistic goal for a new group exercise participant who have been sedentary during the past few years?

A class where participants learn new routines together and pursue group goals

Which of the following scenarios is MOST likely to lead to participants who attend class regularly, enjoy the experience more, and have high levels of self-efficacy toward physical activity?

A participant says that he has been experiencing knee pain since participating last week in a new sports conditioning class.

Which of the following scenarios would warrant referral of a group fitness class participant to an appropriately qualified healthcare professional?

Professional Liability Insurance

Which of the following should group fitness instructors secure as PRIMARY protection to specifically cover work within the health and fitness industry?

The report should include a brief statement of the actions taken at the time of the injury

Which of the following statements about reporting an accident that occurs during a group fitness class is MOST accurate?

A proper cool-down will allow the cardiorespiratory system to recover

Which of the following statements about the cool-down portion of a group fitness class is MOST accurate?

Participants can be taught the dyspnea scale to gauge the appropriateness of breathing difficulty.

Which of the following statements about using the dyspnea scale as a method that can be taught to class participants to help them monitor exercise intensity is MOST accurate?

Instructors must stay up-to-date with changing guidelines and standards throughout the industry.

Which of the following statements is MOST relevant regarding the responsibilities of an ACE certified group fitness instructor?

intrinsic motivation

Which of the following terms can be described as being engaged in physical activity for the inherent pleasure and experience that comes from the engagement itself?

One thumps up

Which of the following visual cues by group fitness instructor conveys positive reinforcement and praise?

Speak at normal volume to protect their voices.

Which of the following voice care tip is RECOMMENDED for group fitness instructors?

Change nutrition and physical-activity patterns to promote weight maintenance

Which of the following weight-management strategies is MOST appropriate for a child who is overweight?

The instructor teaches classes at multiple indecent facilities each week

Which of the following would be MORE characteristic of an independent contractor?

Sand bags

Which of the following would be MOST important to incorporate into a class focused on improving group strength?

Low fat and low fiber

Which of the following would be MOST important to look for when selecting a pre-exercise snack?

An injury to a participant who lost his balance during a yoga pose

Which of the following would be covered by professional liability insurance?

"Visualize sitting back into a chair as you lower into the squat"

Which of the following would be the MOST appropriate corrective feedback for a group fitness instructor to provide to participants having trouble keeping their heels on the ground during a squat exercise?

Place the hand above the top hip, asking the participant to lift the hips until they feel the palm of the hand

Which of the following would be the MOST appropriate way for an ACE Certified Group Fitness Instructor to use his or her hand as a Landmark to cue a participant who is in a collapsed side plank?

Advice them to not wear cotton during exercise, as it readily soaks up sweat and allows for rapid evaporation

Which of the following would recommendations would be MOST important to give a class participant traveling to a cold climate looking to exercise outdoors?

It should reflect the demands of the conditioning segment.

Which off the following considerations is MOST appropriate when designing the warm-up phase of a group fitness class?

Kyphosis

Which postural deviation is characterized by an excessive posterior curvature of the thoracis spine?

Coordination

Which skill-related component of fitness is described as the ability to smoothly and accurately perform complex movements?

Cognitive

Which stage of learning is associated with performing movements with a number of errors?

Speaking becomes slightly difficult, but the individual can still say short sentences.

Which statement BEST describes what an individual experiences when his or her exercise intensity crosses the first ventilatory threshold (VT1)

Identifying early signs of staleness to prevent burnout.

Which strategy would be MOST beneficial for addressing an individual in the maintenance stage?

Simple-to-complex

Which teaching strategy is also known as layering?

Reflective Listening

Which verbal skill can be used by an ACE Certified Group Fitness Instructor to empathize, reflect and clarify the main points and feelings expressed by a participant?

1:2

Which work-to-recovery ration would be MOST appropriate for aerobic intervals performed during a group exercise class?

The facility operator

Who has the primary responsibility for determining if a medical evaluation is warranted prior to an individual participating in group fitness classes based on the health-related info provided on his or her pre-participation form?

Provide body-weight squats with both feet on the floor as an exercise modification at this station

You are training a circuit-based group strength class and notices that few participants are having difficulty performing body-weight squats on an unstable surface (e.g., balance pad). What modification would be MOST appropriate?

Implement a core-conditioning theme

You arrive to your group fitness room 15 minutes early and find out the lights aren't working. What is the MOST appropriate course to modify your kickboxing class plan?

Participants who are familiar with appropriate terminology

verbal cueing is MOST effective when working with

Increased edema

which of the following changes during pregnancy warrants further evaluation by a physician?

Studies have shown that it is not effective.

which of the following is ACCURATE about spot reduction?

Youth sweat less than adults and are therefore more susceptible to heat illness

which of the following is MOST accurate about your fitness classes?

Switching from squats to quarter-squats.

which of the following is an exercise regression?

Rest, ice, compression, elevation

What are the components of the acronym RICE?

Strong

What description of physical effort corresponds to a ratings of perceived exertion (RPE) score of 5 on the 0 to 10 category ratio scale?

If conducting aquatic exercise, check to make sure water temperature is between 83 and 88*F (28 to 31*C)

What guideline would be MOST appropriate to follow when teaching a class designed for participants with arthritis?

People operating outside of their professional realm

What has been the source of many of the biggest lawsuits in the fitness profession?

Perform one repetition of a stretch for each major muscle group, holding each stretch for at least 15 to 30 seconds.

What is a MINIMUM recommendation for a static stretching during the post-conditioning cool-down segment of a group fitness class?

Separates the body into anterior and posterior parts.

What is the BEST description of the frontal plane?

To help prevent issues with equipment capacity for class participants.

What is the BEST reason to report equipment issues to a staff member prior to the beginning of a group fitness class where the equipment was to be used?

address all major muscles worked during the class

What is the MOST appropriate guideline for using Self-Myofascial release in the cool-down portion of class?

1:1 (exercisers should consume the same abut of fluid as they lost in sweat during exercise)

What is the MOST appropriate ratio of fluid replacement to fluid lost following exercise?

Include neuromuscular exercises, leading participants through various balancing exercises

What is the MOST effective method for addressing flexibility during the warm-up portion of an exercise class for older adults?

Progressively challenging the participants.

What is the MOST important consideration when using simple-to-complex teaching strategy?

They enhance participant functionality both inside and outside the class.

What is the PRIMARY reason to include movements that mimic the five primary movement patterns?

To safely and effectively prepare the body for the workout.

What is the PRIMARY reason to incorporate rehearsal moves into the warm-up in a group fitness class?

Shoes designed with cushioning and lateral support

What is the best footwear when instructing a dance-based group fitness class?

Dorsiflexion

What is the name of the movement that involves raising the top of the foot towards the front of the lower leg?

To allow all participants to see the instructor

What is the primary reason for implementing a stagger arrangements in a group fitness class?

The transverse abdominal muscle is activated when the navel is pulled in toward the spine

What muscle pulls the navel in toward the spine?

Encourage participants to work within their own fitness levels

As a group fitness instructor you notice a participant continuously choosing the same advanced potions as a person next to her, but is having difficulty completing the exercises. Which is the most important reminder to verbalize the next time that participant comes to class?

Utilize the asphalt trail and incorporate standing abdominal exercises.

As an instructor your teaching a class outside and notices the park is wet and the grass is soggy with puddles. How should the class plan to be altered?

Part-to-whole

Teaching participants how to first perform walking lunges and then perform torso rotations holding a medicine ball, before combining the two movements into a single exercise is an example of which teaching strategy?

Sedentary individuals can yield benefits from less than 20 mins of exercise each day.

The evidence-based recommendations for aerobic exercise include which of the following?

Conditioning segment

The talk-test, heart rate, and perceived exertion (RPE) are PRIMARILY used to monitor exercise intensity during which segment of a group fitness class?