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Flashcards in Sports Deck (13):
1

Known to increase the deposition of fat in the female, esp breasts, hips, and subq tissue

Estrogen

2

The strength of a muscle is mainly determined by

Its size, wt a maximal contractile force bet 3&4 kg/cm2 of muscle cross-sectional area

3

Holding strength of muscles

If a muscle is already contracted and a force then attempts to stretch out the muscle, this requires abr 40% more force than can be achieved by a shortening contraction

4

A measure of the total amount of work that the muscle performs in a unit period of time

Power

Determined not only bu the strength of muscle contraction but also by its distance of contraction and the number of times that it contracts each min

Gen measured in kg-m/min

5

Efficiency

Less during rapid activity than during less rapid but sustained activity

6

Depends on the nutritive support for the muscle - on the amt of glycogen

Endurance

7

3 metab systems impt in understanding the limits of physical activity

1. Phosphocreatine-creatine system
2. Glycogen-lactic acid system
3. Aerobic system

8

Combined amts of cell ATP & cell phosphocreatine; used for maximal short bursts of muscle power

Phosphagen energy system

9

Maximal rates of power gen per minute

phosphagen system: 4mol ATP/min
Glycogen-lactic acid system: 2.5mol ATP/min
Aerobic system: 1mol ATP/min

10

used by the muscle for power surges of a few seconds

Phosphagen system

11

Required for prolonged athletic activity

Aerobic system

12

Especially important for giving extra power during intermediate races

Glycogen-lactic acid system

13

Hormone secreted by the testes that has a powerful anabolic effect in causing greatly increased deposition of protein everywhere in the body, but the muscles

Testosterone