PHYSIOLOGY
MUSCLE ENERGETICS ATP AND CP
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ventilation rate increases
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Pain levels increase
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Blood lactate levels decrease
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Fatigue sets in
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Detailed explanation-1: -Lactate inflection point (LIP), is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly. It is often expressed as 85% of maximum heart rate or 75% of maximum oxygen intake.
Detailed explanation-2: -Lactate threshold intensity is associated with several factors including the proportion of slow twitch muscle fibres, mitochondrial size and density, muscle capillary density, efficient fatty acid metabolism and body mass.
Detailed explanation-3: -The concentration of blood lactate is usually 1-2 mmol/L at rest, but can rise to greater than 20 mmol/L during intense exertion. Blood lactate levels essentially serve as an indirect marker for biochemical events such as fatigue within exercising muscle.