When young adults do intense workout bursts, take a 3-month break, then start again, their muscles' energy factories improve more the second time—even if their overall fitness doesn’t get much...

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Evidence from Studies

Supporting (1)

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Human skeletal muscle possesses an epigenetic memory of high intensity interval training affecting mitochondrial function

Cohort Study

Human

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Source Study

Human skeletal muscle possesses an epigenetic memory of high intensity interval training affecting mitochondrial function

Score: 39

DOI: 10.1152/physiol.2023.38.s1.5734999

Similar Assertions

For people who aren't super fit to start with, different types of workouts—like steady cardio, intense interval training, and short sprints—boost the energy powerhouses in their muscles by about the same amount, around 23–27%.

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Lifting weights twice a week for six weeks—whether doing fewer heavy reps or more lighter ones—can help young guys' muscles use oxygen better, which means their muscles may get more efficient at producing energy.

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Sprint workouts might boost your muscle energy factories way faster per minute than other types of exercise — about 2-4 times more efficiently than harder or longer workouts, especially if you're just starting out or somewhat active.

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