The asymmetry of pectoralis muscles is greater in male prepubertal than in professional tennis players |
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| Authors: | Joaquin Sanchis-Moysi Cecilia Dorado Fernando Idoate Juan J González-Henríquez Jose A Serrano-Sanchez Jose A L Calbet |
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| Institution: | 1. Department of Physical Education, University of Las Palmas de Gran Canaria, Canary Island, Spain;2. Radiology Department, Clínica San Miguel, Pamplona, Navarra, Spain;3. Department of Mathematics, University of Las Palmas de Gran Canaria, Canary Island, Spain |
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| Abstract: | It is generally accepted that preadolescents have a limited capacity to develop muscle hypertrophy in response to exercise compared with older populations; however, studies are scarce and conflicting. The main aim of the present study was to assess if playing tennis is associated with the hypertrophy of dominant pectoralis muscles (PM) in professional (PRO) and in prepubescent tennis players (PRE). A secondary aim was to assess if the degree of asymmetry of PM is greater in PRO than PRE. The volume of PM of both sides was determined using magnetic resonance imaging in 8 male PRO (21.9 years), 6 male PRE (11 years, Tanner 1–2) and 12 male non-active controls (6 adults: 23.5 years; and 6 prepubescents: 10.7 years, Tanner 1–2). PRO and PRE had 15 and 30% greater volume, respectively, in the dominant than in the contralateral PM (P?P?=?.34 in adults and 5%, P?=?.17 in children). The degree of side-to-side asymmetry in PM volume was greater in PRE than in PRO (P?
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| Keywords: | Children pectoralis muscle size muscle tennis players asymmetry |
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