Fatigue and recovery from dynamic contractions in men and women differ for arm and leg muscles. Issue 3 (27th July 2013)

• Record Type: Journal Article
• Authors: Senefeld, Jonathon; Yoon, Tejin; Bement, Marie Hoeger; Hunter, Sandra K.
• Is Part Of: Muscle & nerve. Volume 48:Issue 3(2013:Sep.)
• Page Start: 436
• Page End: 439
• Publication Date: 2013-07-27
• Subjects: Neuromuscular diseases -- Periodicals; Muscles -- Periodicals; Nerves -- Periodicals; 616.74
• DOI: 10.1002/mus.23836
• Languages: English
• ISSNs: 0148-639X

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p> <italic>Introduction</italic>: Whether there is a gender difference in fatigue and recovery from maximal velocity fatiguing contractions and across muscles is not understood. <italic>Methods</italic>: Sixteen men and 19 women performed 90 isotonic contractions at maximal voluntary shortening velocity (maximal velocity concentric contractions, MVCC) with the elbow flexor and knee extensor muscles (separate days) at a load equivalent to 20% maximal voluntary isometric contraction (MVIC). <italic>Results</italic>: Power (from MVCCs) decreased similarly for men and women for both muscles (<italic>P</italic> &gt; 0.05). Men and women had similar declines in MVIC of elbow flexors, but men had greater reductions in knee extensor MVIC force and MVIC electromyogram activity than women (<italic>P</italic> &lt; 0.05). The decline in MVIC and power was greater, and force recovery was slower for the elbow flexors compared with knee extensors. <italic>Conclusions</italic>: The gender difference in muscle fatigue often observed during isometric tasks was diminished during fast dynamic contractions for upper and lower limb muscles. <italic>Muscle Nerve</italic><bold>48</bold>: 436–439, 2013</p> </abstract>