Objective 16

Question 0

What four things need to occur in order for a muscle to return to a maximally functioning resting state?

Answer 0

• Oxygen reserves must be replenished
• Lactic acid must be converted to pyruvic acid
• Glycogen stores must be replaced
• ATP and CP reserves must be resynthesized

Question 1

What is oxygen debt?

Answer 1

When vigorous exercise causes dramatic changes in muscle chemistry
(It is the extra amount of O2 needed for the restorative process to occur)

Question 2

What is muscle fatique?

Answer 2

The physiological inability to contract

Question 3

Describe how muscle fatigue occurs

Answer 3

When ATP production fails to keep pace with ATP use

Question 4

What causes muscle fatigue?

Answer 4

• Muscle fatigue is due to ionic imbalances (Na+-K+ pumps cannot restore ionic balances quickly enough)
• Due to lactic acid accumulation in the muscle

Question 5

Why are “rest days” crucial to allow for SR repair?

Answer 5

Because prolonged exercise damages the SR and interferes with Ca2+ regulation and release