We cover topics including: muscle pairs, Davis' law, cumulative injury cycle, and the muscle stretch reflex.

1. FLEXIBILIT
WHY IS IT SO IMPORTANT?

2. INCREASE
RISK FOR
INJURY
DECREASE
ABILITY
TO ACHIEVE
GOALS
WITHOUT
ADEQUATE
FLEXIBILITY

3. TEXT
Inflexibility

4. DAVIS’
LAW▸ soft tissue (like muscles) heal in
response to the stresses that
damaged them
▸ The Result
▸ muscles that are always elongated
get longer
▸ muscles that are always contracted
get shorter

5. Agonist: the muscle(s) that
provides the major force to
complete the movement
(also know as Prime Movers)
MUSCLE PAIRS
Antagonist: the muscle(s)
that act in opposition to the
agonist.

6. BALANCE
IMBALAN
Agonist and Antagonist muscles are of appropriate length. The
joint is in the appropriate position.
One of the pairs is too long (weak) or too short (tight).
Inappropriate length puts the joint in the wrong position.

7. MUSCLE STRETCH REFLEX
https://www.khanacademy.org/science/health-and-medicine/nervous-system-and-sensory-infor/nervous-
system-introduction-ddp/v/muscle-stretch-reflex

8. TEXT
WORKSHEE

9. TEXT