Fundamental of Procedures - Isotonic exercises
higher velocity = eccentric contraction levels off or slightly increases while concentric contraction decreases
How does velocity alter production of force
slow velocity = greater force with eccentric contraction
How does velocity alter production of force
increase dynamic strength, muscle endurance and power
Isotonic exercise is used to do what
only can overload the weakest point
Negatives of Isotonic exercises
requires training on proper completion for safety
Negatives of Isotonic exercises
can be inexpensive
Positives of Isotonic exercises
can be open or closed chain
Positives of Isotonic exercises
contraction against a maximal load produces more tension than an isometric contraction
Positives of Isotonic exercises
easy application
Positives of Isotonic exercises
multiple points get loads
Positives of Isotonic exercises
DOMS (keep load low acutely and progressively increase)
Precautions of eccentric contraction
increased stress on cardiovascular system (teach rhythmic breathing)
Precautions of eccentric contraction
max eccentric contraction produces greater force than max concentric contraction
What are force production variations of eccentric contraction
the resistance to change throughout the full ROM
What do variable loads allow
control a greater load
What does eccentric contraction do
easier to perform in acute phase
What does eccentric contraction do
greater force production
What does eccentric contraction do
greater resistance to fatigue by consuming less oxygen and fewer energy stores
What does eccentric contraction do
more efficient (less effort required)
What does eccentric contraction do
provide shock absorption during closed-chain activities
What does eccentric contraction do
same tension
What does isotonic mean
exercise carried out against a load (constant) does not change while the muscle shortens and lengthens
What is a isotonic exercise
tension develops as muscle is shortened when external force is applied
What is concentric
tension develops as muscle is elongated when external force is applied
What is eccentric
manual or mechanical resistance
What is isotonic exercise used with
usually include a component of each; most resembles functional use of muscle
Concentric vs Eccentric
load cannot be greater than what the weakest point of the muscle can lift
Constant vs Variable load
lifting weight, theraband, pushups (up phase)
Example of concentric exercise
lowering weight, release theraband, pushups (down phase), lowering to sit
Example of eccentric exercise