1.11. Muscles and Exercise http://www.ck12.org
FIGURE 1.21
When done regularly, aerobic activities,
such as cycling, make the heart stronger.FIGURE 1.22
Warming up before the game helps the
players avoid injuries. Some warm-ups
may include stretching exercises.- anaerobic exercise: Activity that increases muscle strength.
- lifestyle disease: Diseases that appear to increase in frequency as countries become more industrialized and
people live longer; can include heart disease, obesity, type 2 diabetes, and some kinds of cancer. - muscular endurance: Ability of a muscle to do continous work over a long period of time.
- muscular strength: Amount of force that your muscles can exert against resistance.
- strain: Tearing of a muscle or tendon.
- tendinitis: Irritation of the tendon.