European Journal of Applied Physiology · 7 authors, 5 centres
This summary was generated by AI from a single paper. It has not been reviewed by a clinician and is not clinical advice. Verify against the source before acting on it.
Twelve recreationally active participants performed work-matched eccentric heel drops at low load (body weight) and high load (body weight + 30%) on separate legs in a randomized within-subject design. Despite increased muscle activity under high load, neither torque loss nor muscle soreness differed between conditions.
Twelve recreationally active participants completed two bouts of eccentric heel drop exercise — one low-load (body weight) and one high-load (body weight + 30% body weight) — on separate legs in a randomized within-subject design. Total mechanical work was matched between conditions. Triceps surae twitch torque, medial gastrocnemius (MG) soreness, active fascicle length, and passive stiffness were measured before, 2 h, and 48 h post-exercise. The high-load condition increased triceps surae muscle activity by 6–9% but reduced MG fascicle stretch, while muscle–tendon unit stretch was similar between conditions. The authors attribute the minimal impact of load on muscle damage to architectural features of the MG, including large pennation angles and high series elastic compliance that buffer fibres against stretch.
