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You won’t freeze your lungs exercising outdoors this winter, but there are reasons to be cautious about inhaling extremely cold air

As per findings in a recent study published in the eLife journal, scientists have revealed that high-intensity interval training (HIIT) has significant effects on the human skeletal muscle, boosting the total quantity of proteins necessary for contraction of muscles and energy metabolism.

The guys exercised three times each week, riding for four minutes at more than 90% of their maximal heart rate, then resting for two minutes.

Scientists have shed new light on the effects that high-intensity interval training (HIIT) has on human skeletal muscle, according to a study in men published today in