Human capacity for explosive force production: neural and contractile determinants

Scandinavian Journal of Medicine & Science in Sports
J P FollandR Hannah

Abstract

This study assessed the integrative neural and contractile determinants of human knee extension explosive force production. Forty untrained participants performed voluntary and involuntary (supramaximally evoked twitches and octets - eight pulses at 300 Hz that elicit the maximum possible rate of force development) explosive isometric contractions of the knee extensors. Explosive force (F0-150 ms) and sequential rate of force development (RFD, 50-ms epochs) were measured. Surface electromyography (EMG) amplitude was recorded (superficial quadriceps and hamstrings, 50-ms epochs) and normalized (quadriceps to Mmax, hamstrings to EMGmax). Maximum voluntary force (MVF) was also assessed. Multiple linear regressions assessed the significant neural and contractile determinants of absolute and relative (%MVF) explosive force and sequential RFD. Explosive force production exhibited substantial interindividual variability, particularly during the early phase of contraction [F50, 13-fold (absolute); 7.5-fold (relative)]. Multiple regression explained 59-93% (absolute) and 35-60% (relative) of the variance in explosive force production. The primary determinants of explosive force changed during the contraction (F0-50, quadriceps EMG and T...Continue Reading

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Citations

Mar 5, 2016·European Journal of Applied Physiology·Nicola A MaffiulettiJacques Duchateau
Dec 6, 2014·European Journal of Applied Physiology·Ricci HannahClaire Minshull
Dec 17, 2014·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Ricci Hannah, Jonathan P Folland
Oct 16, 2016·Scandinavian Journal of Medicine & Science in Sports·Pavlos E EvangelidisJonathan P Folland
Oct 8, 2016·BMC Musculoskeletal Disorders·Bente Rona JensenBirgit Juul-Kristensen
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Jun 2, 2020·Scandinavian Journal of Medicine & Science in Sports·Juha-Tapio TurpeinenPer Aagaard
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