Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Lie face down on a bench, legs extended, dumbbell secured between your feet. Hips pressed into the bench, core engaged. Curl the dumbbell upward by bending your knees, heels towards your glutes. Pause, squeeze hamstrings. Lower slowly.
Securely hold the dumbbell. Use slow, controlled movements. Maintain hip contact with the bench. Engage your core. Avoid knee lockout to maintain hamstring tension. Start with a lighter weight.
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