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Inside the Science of Hybrid Training: New Findings on Muscle and Endurance Growth

Inside the Science of Hybrid Training: New Find...

New review: sprint intervals build mitochondria 3.9x faster per hour than steady endurance, but only endurance work grows capillary density.

Inside the Science of Hybrid Training: New Find...

New review: sprint intervals build mitochondria 3.9x faster per hour than steady endurance, but only endurance work grows capillary density.