MICROANATOMY

Detailed explanation-1: -The effect of endurance training on myoglobin concentrations Mitochondria (the powerhouses of the cells) are necessary for creating ATP for energy. Myoglobin, on the other hand brings in the oxygen needed for that process, improving the aerobic capacity of muscles.

Detailed explanation-2: -Endurance exercise can also increase the amount of myoglobin in a cell, as increased aerobic respiration increases the need for oxygen. Myoglobin is found in the sarcoplasm and acts as an oxygen storage supply for the mitochondria.

Detailed explanation-3: -Aerobic exercise is a potent stimulus to increase mitochondrial mass and function in skeletal muscle.

Detailed explanation-4: -Myoglobin facilitates oxygen diffusion. Myoglobin desaturates at the onset of muscle activity, which increases oxygen’s diffusion gradient from the capillaries to the cytoplasm. Myoglobin has also been shown to have enzymatic functions.