Oxygen Saturation of Dorsiflexor Muscles during Sustained Isometric Contraction

Sustained isometric contractions of skeletal muscles produce intramuscular pressures that lead to blood flow restriction. Thus, we have the paradox of rising O2 demand due to muscle activity and at the same time reduced blood flow. Aim: To assess muscle oxygenation during sustained isometric low (30%), moderate (60%) and submaximal (90% of maximal voluntary contraction (MVC)) contraction of the dorsiflexor muscle. Experiments were conducted on the dominant (right) leg of 8 male students of Uzbekistan State Institute of Physical Culture (age: 19 ± 2 years, weight: 75 ± 6 kg).

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