Effect of range of motion in heavy load squatting on muscle and tendon adaptations

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K Bloomquist, Henning Langberg, Stine Karlsen, S Madsgaard, M Boesen, T Raastad

Manipulating joint range of motion during squat training may have differential effects on adaptations to strength training with implications for sports and rehabilitation. Consequently, the purpose of this study was to compare the effects of squat training with a short vs. a long range of motion. Male students (n = 17) were randomly assigned to 12 weeks of progressive squat training (repetition matched, repetition maximum sets) performed as either a) deep squat (0-120° of knee flexion); n = 8 (DS) or (b) shallow squat (0-60 of knee flexion); n = 9 (SS). Strength (1 RM and isometric strength), jump performance, muscle architecture and cross-sectional area (CSA) of the thigh muscles, as well as CSA and collagen synthesis in the patellar tendon, were assessed before and after the intervention. The DS group increased 1 RM in both the SS and DS with ~20 ± 3 %, while the SS group achieved a 36 ± 4 % increase in the SS, and 9 ± 2 % in the DS (P
OriginalsprogEngelsk
TidsskriftJournal of Applied Physiology
Vol/bind113
Udgave nummer8
Sider (fra-til)2133-42
Antal sider10
ISSN0161-7567
DOI
StatusUdgivet - aug. 2013

ID: 98570258