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Using Bilateral Fun...
Using Bilateral Functional and Anthropometric Tests to Define Symmetry in Cross-Country Skiers
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- Björklund, Glenn, 1972- (author)
- Mittuniversitetet,Avdelningen för hälsovetenskap,The Swedish Sports Confederation, Stockholm, Sweden,Mid Sweden University;Swedish Sports Confederation
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- Alricsson, Marie (author)
- Mittuniversitetet,Avdelningen för hälsovetenskap,Linnéuniversitetet,Institutionen för idrottsvetenskap (ID),Mid Sweden University
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- Svantesson, Ulla, 1952 (author)
- Mittuniversitetet,Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi,Institute of Neuroscience and Physiology,Avdelningen för hälsovetenskap,Sahlgrenska Akademin, Göteborgs Universitet,Mid Sweden University;University of Gothenburg
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(creator_code:org_t)
- 2017-12-28
- 2017
- English.
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In: Journal of Human Kinetics. - : Walter de Gruyter GmbH. - 1640-5544 .- 1899-7562. ; 60:1, s. 9-18
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Abstract
Subject headings
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- The aim of this study was to evaluate the symmetry of anthropometry and muscle function in cross-country skiers and their association to vertical jumping power. Twenty cross-country skiers were recruited (21.7 +/- 3.8 yrs, 180.6 +/- 7.6 cm, 73.2 +/- 7.6 kg). Anthropometric data was obtained using an iDXA scan. VO2max was determined using the diagonal stride technique on a ski treadmill. Bilateral functional tests for the upper and lower body were the handgrip and standing heel-rise tests. Vertical jump height and power were assessed with a counter movement jump. Percent asymmetry was calculated using a symmetry index and four absolute symmetry index levels. At a group level the upper body was more asymmetrical with regard to lean muscle mass (p = 0.022, d = 0.17) and functional strength (p = 0.019, d = 0.51) than the lower body. At an individual level the expected frequencies for absolute symmetry level indexes showed the largest deviation from zero for the heel-rise test (chi 2 = 16.97, p = 0.001), while the leg lean mass deviated the least (chi 2 = 0.42, p = 0.517). No relationships were observed between absolute symmetry level indexes of the lower body and counter movement jump performance (p > 0.05). As a group the skiers display a more asymmetrical upper body than lower body regarding muscle mass and strength. Interestingly at the individual level, despite symmetrical lean leg muscle mass the heel-rise test showed the largest asymmetry. This finding indicates a mismatch in muscle function for the lower body.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Keyword
- physical fitness
- body composition
- hand strength
- heel-rise test
- muscle fatigue
- jump performance
- triceps surae
- strength
- asymmetry
- biomechanics
- parameters
- exercise
- energy
- Sport Sciences
- Physical fitness
- Idrottsvetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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