Term
| When training for explosiveness, use ____ resistance |
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Definition
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Term
| DOMS occurs __ hours after exercise |
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Definition
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Term
| what occurs when calcium is not available? |
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Definition
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Term
| ____ and ___ are necessary for myosin crossbridge cycling with actin filaments |
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Definition
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Term
Type 1 fibers are ___ twitch
Type 2 fibers are ___ twitch |
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Definition
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Term
Eccentric muscle action:
Tension in cross bridges is _____ |
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Definition
| less than the external resistance |
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Term
| How do you increase the cross sectional area of muscles? |
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Definition
| use resistance 65-80% of 1RM |
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Term
| During muscle contraction, the __ and __ decreases |
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Definition
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Term
| This type of muscle action induces the most DOMS |
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Definition
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Term
| The sliding filament theory states that the _____ |
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Definition
| actin filaments slide inward on myosin filaments |
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Term
| Contraction phase: the energy for crossbridge flexion comes from ___ |
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Definition
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Term
| What is released during the action potential to produce a coordinated contraction? |
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Definition
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Term
| This type of muscle action is when the tension in cross bridges = resistance to shortening |
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Definition
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Term
| What do the cross bridges attach to during muscle action? |
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Definition
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Term
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Definition
| reduced muscle size and strength |
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Term
| Relaxation occurs when this stops |
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Definition
| stimulation of the motor nerve |
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Term
| Describe concentric muscle action |
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Definition
| tension in cross bridges overcomes resistance to shortening |
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Term
| What is the difference between type 2A and 2B muscle fibers? (4 things) |
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Definition
type 2A has:
more fatigue resistance
more mitochondria
greater aerobic enzyme activity
greater capillary density |
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Term
| What increases force produced during concentric muscle action? |
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Definition
agonist prestretching
more calcium released
decreased antagonist activity |
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Term
| this type of muscle fiber fatigues rapidly |
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Definition
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Term
| A bundle of muscle fibers is the __ |
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Definition
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Term
| What changes in the muscle produce soreness? (3 things) |
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Definition
Increased fluid in muscle
decreased z-line integrity
decreased titin filament integrity |
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Term
| Parts in a sarcomere (7 things) |
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Definition
| actin,myosin,m-bridge, h-zone, z-line, a-band, i-band |
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Term
| 4 phases of muscular contraction |
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Definition
| resting, contraction, recharge, relaxation |
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Term
| this is responsible for the shortening of the muscle fiber |
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Definition
| the z-lines are pulled toward the center of the sarcomere |
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Term
| this type of muscle fiber has high aerobic enzyme activity and dense capillary contraction |
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Definition
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Term
| Which type of muscle fibers develop greater force |
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Definition
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