Physical fitness Flashcards
Definition of physical fitness
a measure of one’s _physical health
Definition of exercise
Physical activity that is planned, structured, and usually involves repetitive bodily movements
Designed to improve or maintain _physical fitness
Definition of strength
maximum force a muscle can generate in 1 contraction no time limit
Maximal _strength definition:
ability to perform maximal voluntary muscular contractions in order to overcome powerful external resistances
One Repetition Maximum definition:
greatest force that can be exerted during one repitition
Strength can be increased via:
myogenesis_, the development of muscular tissue.
How does the muscle adapt to stress?
synthesizes more actin and myosin making the muscle bigger and more capable of producing force
what is the relative strength equation?
Maximal Strength/Body Mass
Some neural mechanisms that enhance strength:
- Increase firing frequency
- Recruit more motor units
- synchronize the firing of motor units
- Reduce inhibitory firing
- Improve inter-muscular coordination
- Utilize Stretch reflex immediately prior to movement
What is the isometric state?
muscle force equals the load, the muscle will not change in length
What is the concentric_ state?
muscle force exceeds the load, the muscle will shorten
What is the eccentric_ state?
muscle force is less than the load, the muscle will lengthen