1. Regional hypertrophy of muscle cannot be predicted by surface electromyography.
- Author
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Zabaleta-Korta, Aitor, Latorre-Erezuma, Unai, Fernández-Peña, Eneko, Torres-Unda, Jon, and Santos-Concejero, Jordan
- Subjects
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SKELETAL muscle physiology , *MUSCLE fatigue , *MUSCULAR hypertrophy , *T-test (Statistics) , *PREDICTION models , *RESEARCH funding , *EXERCISE therapy , *KINEMATICS , *DESCRIPTIVE statistics , *ELECTROMYOGRAPHY , *STRENGTH training , *ARM exercises , *COMPARATIVE studies , *MUSCLE contraction , *BICEPS brachii - Abstract
BACKGROUND: In the last decades, emerging evidence has shown that muscle growth is not homogeneous along a muscle head. This phenomenon is known as regional muscle hypertrophy and has led to several questions regarding the implications it may have for health and sports performance. OBJECTIVE: The aim of this study was to determine whether regional hypertrophy can be predicted by surface electromyography (sEMG). METHODS: 36 participants performed two arm exercises (preacher curls and inclined curls) in a random order to muscle failure at 70% of the 1 RM of the bicep curl exercise. As every participant performed a different number of repetitions, Peak sEMG and the integral of the sEMG of the last 3 repetitions was analyzed an compared to previously performed maximal voluntary isometric contractions (MVIC). RESULTS: The independent sample t -tests showed no significant differences neither in the peak nor in the integral of the sEMG between exercises for any given region. CONCLUSIONS: sEMG cannot be used to predict regional hypertrophy. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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