The upper extremity of the professional tennis player: muscle volumes, fiber-type distribution and muscle strength
The effects of professional tennis participation on dominant and non‐dominant upper extremity muscle volumes, and on fiber types of triceps brachii (lateral head) and vastus lateralis muscles were assessed in 15 professional tennis players. Magnetic resonance imaging (MRI, n=8) examination and dual‐...
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Published in | Scandinavian journal of medicine & science in sports Vol. 20; no. 3; pp. 524 - 534 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Blackwell Publishing Ltd
01.06.2010
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Subjects | |
Online Access | Get full text |
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Summary: | The effects of professional tennis participation on dominant and non‐dominant upper extremity muscle volumes, and on fiber types of triceps brachii (lateral head) and vastus lateralis muscles were assessed in 15 professional tennis players. Magnetic resonance imaging (MRI, n=8) examination and dual‐energy x‐ray absorptiometry (DXA, n=7) were used to assess muscle volumes and lean body mass. Muscle fiber‐type distribution assessed by biopsy sampling was similar in both triceps brachii (2/3 were type 2 and 1/3 type 1 fibers). The VL was composed of 1/3 of type 2 and 2/3 of type 1 fibers. The dominant had 12–15% higher lean mass (DXA/MRI) than the non‐dominant (P<0.05). Type 1, 2a and 2x muscle fibers of the dominant were hypertrophied compared with the non‐dominant by 20%, 22% and 34% (all P<0.01), respectively. The deltoid, triceps brachii, arm flexors and forearm superficial flexor muscles of the dominant were hypertrophied (MRI) compared with the non‐dominant by 11–15%. These muscles represented a similar fraction of the whole muscle volume in both upper extremities. Dominant muscle volume was correlated with 1RM on the one‐arm cable triceps pushdown exercise (r=0.84, P<0.05). Peak power during vertical jump correlated with VL muscle fibers's cross‐sectional area (r=0.82–0.95, P<0.05). |
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Bibliography: | ark:/67375/WNG-XD8H83V3-B istex:488315DA640F1E539A0F14CB92950CF95EE2CCEC ArticleID:SMS969 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0905-7188 1600-0838 |
DOI: | 10.1111/j.1600-0838.2009.00969.x |