Tendinous Tissue Adaptation to Explosive- vs. Sustained-Contraction Strength Training

Frontiers in Physiology
G J MasseyJ P Folland

Abstract

The effect of different strength training regimes, and in particular training utilizing brief explosive contractions, on tendinous tissue properties is poorly understood. This study compared the efficacy of 12 weeks of knee extensor explosive-contraction (ECT; n = 14) vs. sustained-contraction (SCT; n = 15) strength training vs. a non-training control (n = 13) to induce changes in patellar tendon and knee extensor tendon-aponeurosis stiffness and size (patellar tendon, vastus-lateralis aponeurosis, quadriceps femoris muscle) in healthy young men. Training involved 40 isometric knee extension contractions (three times/week): gradually increasing to 75% of maximum voluntary torque (MVT) before holding for 3 s (SCT), or briefly contracting as fast as possible to ∼80% MVT (ECT). Changes in patellar tendon stiffness and Young's modulus, tendon-aponeurosis complex stiffness, as well as quadriceps femoris muscle volume, vastus-lateralis aponeurosis area and patellar tendon cross-sectional area were quantified with ultrasonography, dynamometry, and magnetic resonance imaging. ECT and SCT similarly increased patellar tendon stiffness (20% vs. 16%, both p < 0.05 vs. control) and Young's modulus (22% vs. 16%, both p < 0.05 vs. control). T...Continue Reading

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Citations

Mar 6, 2021·Sports Biomechanics·Dustin J OranchukJohn B Cronin
Oct 4, 2020·Medicine and Science in Sports and Exercise·Robert MillerJonathan P Folland
Mar 30, 2021·PeerJ·Miyuki NakataniYohei Takai
May 4, 2021·Medicine and Science in Sports and Exercise·Thomas G BalshawJonathan P Folland
Dec 5, 2021·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Tuba Selcuk CanBehice Kaniye Yilmaz

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