• high yield ATP• requires O2 and thus more vascular • increase mitochondria in cells
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A 46-year-old bodybuilder experiences the injury shown in Video V. The type of injury shown in this video most commonly occurs in which phase of muscle contraction?
The eccentric phase of this isometric exercise
The concentric phase of this isometric exercise
The eccentric phase of this isokinetic exercise
The concentric phase of this isotonic exercise
The eccentric phase of this isotonic exercise
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The force generated by a muscle is most highly dependent on its
level of conditioning.
A collegiate football player is hit in the thigh by an opposing player's helmet. Radiographs are unremarkable and a clinical image of the injury is shown in Figure A. Which of the following cells appear first at the site of injury?
While flexing the elbow to perform a biceps curl, what type of muscle contraction is occuring?
Progressive overloading of muscles in adults during exercise leads to which of the following?
Increased muscle fiber length
Decreased musculotendinous junction length
Slowed peak contraction velocity
Muscle fiber hypertrophy
Decreased sarcomere length
The cross-sectional area of a muscle is the factor most responsible for which of the following?
Amount of maximal tension
Speed of contraction
Duration of contraction
Type of contraction
Regarding skeletal muscles, which of the following is true?
Force generated is most dependent on muscle length
Force generated is most dependent on muscle fiber type
Type I muscle is comprised of fast twitch fibrils
Duration and speed of contraction are most dependent on cross-sectional area
Duration and speed of contraction are most dependent on muscle fiber type