The problem is people refuse to believe this and will insist on the marathon workouts anyway

The problem is people refuse to believe this and will insist on the marathon workouts anyway https://medicalxpress.com/news/2025-06-muscle-gain-strength-smarter-longer.html

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I heard a similar study for flexibility - stretching more often for far shorter amounts than you think will increase flexibility more than holding stretches for a long time.