Changes in single skinfold thickness in 100 km ultramarathoners

BACKGROUND: Changes in single skinfold thickness and body fat have been investigated in ultraswimmers and ultracyclists, but not in ultrarunners. The present study investigated the changes in single skinfold thickness during a 100 km ultramarathon. METHODS: Firstly, we investigated associations betw...

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Autores principales: Knechtle, Beat, Baumgartner, Sabrina, Knechtle, Patrizia, Rüst, Christoph Alexander, Rosemann, Thomas, Bescós, Raúl
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Dove Medical Press 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3781909/
https://www.ncbi.nlm.nih.gov/pubmed/24198597
http://dx.doi.org/10.2147/OAJSM.S37035
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author Knechtle, Beat
Baumgartner, Sabrina
Knechtle, Patrizia
Rüst, Christoph Alexander
Rosemann, Thomas
Bescós, Raúl
author_facet Knechtle, Beat
Baumgartner, Sabrina
Knechtle, Patrizia
Rüst, Christoph Alexander
Rosemann, Thomas
Bescós, Raúl
author_sort Knechtle, Beat
collection PubMed
description BACKGROUND: Changes in single skinfold thickness and body fat have been investigated in ultraswimmers and ultracyclists, but not in ultrarunners. The present study investigated the changes in single skinfold thickness during a 100 km ultramarathon. METHODS: Firstly, we investigated associations between prerace preparation and prerace body composition and, secondly, changes in single skinfold thickness during a 100 km ultramarathon in 219 male ultramarathoners. Changes in fat mass and skeletal muscle were estimated using anthropometric methods. RESULTS: Kilometers run weekly prerace and running speed during training were negatively associated with all skinfold thicknesses (P < 0.05) except for the front thigh skinfold. During the race, skinfold thickness at the pectoral (−0.1%), suprailiac (−1.8%), and calf (−0.8%) sites decreased (P < 0.05). The subjects lost 1.9 ± 1.4 kg of body mass (P < 0.001), 0.7 ± 1.0 kg of estimated skeletal muscle mass (P < 0.001), and 0.2 ± 1.3 kg of estimated fat mass (P < 0.05). The decrease in body mass was positively related to the decrease in both estimated skeletal muscle mass (r = 0.21, P = 0.0017) and estimated fat mass (r = 0.41, P < 0.0001). CONCLUSION: Firstly, prerace fat mass and prerace skinfold thickness were associated with both volume and speed in running training. Secondly, during the ultramarathon, skinfold thickness decreased at the pectoral, suprailiac, and calf sites, but not at the thigh site. Percent decreases in skinfold thickness for ultrarunners was lower than the percent decreases in skinfold thickness reported for ultraswimmers and ultracyclists.
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spelling pubmed-37819092013-11-06 Changes in single skinfold thickness in 100 km ultramarathoners Knechtle, Beat Baumgartner, Sabrina Knechtle, Patrizia Rüst, Christoph Alexander Rosemann, Thomas Bescós, Raúl Open Access J Sports Med Original Research BACKGROUND: Changes in single skinfold thickness and body fat have been investigated in ultraswimmers and ultracyclists, but not in ultrarunners. The present study investigated the changes in single skinfold thickness during a 100 km ultramarathon. METHODS: Firstly, we investigated associations between prerace preparation and prerace body composition and, secondly, changes in single skinfold thickness during a 100 km ultramarathon in 219 male ultramarathoners. Changes in fat mass and skeletal muscle were estimated using anthropometric methods. RESULTS: Kilometers run weekly prerace and running speed during training were negatively associated with all skinfold thicknesses (P < 0.05) except for the front thigh skinfold. During the race, skinfold thickness at the pectoral (−0.1%), suprailiac (−1.8%), and calf (−0.8%) sites decreased (P < 0.05). The subjects lost 1.9 ± 1.4 kg of body mass (P < 0.001), 0.7 ± 1.0 kg of estimated skeletal muscle mass (P < 0.001), and 0.2 ± 1.3 kg of estimated fat mass (P < 0.05). The decrease in body mass was positively related to the decrease in both estimated skeletal muscle mass (r = 0.21, P = 0.0017) and estimated fat mass (r = 0.41, P < 0.0001). CONCLUSION: Firstly, prerace fat mass and prerace skinfold thickness were associated with both volume and speed in running training. Secondly, during the ultramarathon, skinfold thickness decreased at the pectoral, suprailiac, and calf sites, but not at the thigh site. Percent decreases in skinfold thickness for ultrarunners was lower than the percent decreases in skinfold thickness reported for ultraswimmers and ultracyclists. Dove Medical Press 2012-10-25 /pmc/articles/PMC3781909/ /pubmed/24198597 http://dx.doi.org/10.2147/OAJSM.S37035 Text en © 2012 Knechtle et al, publisher and licensee Dove Medical Press Ltd This is an Open Access article which permits unrestricted noncommercial use, provided the original work is properly cited.
spellingShingle Original Research
Knechtle, Beat
Baumgartner, Sabrina
Knechtle, Patrizia
Rüst, Christoph Alexander
Rosemann, Thomas
Bescós, Raúl
Changes in single skinfold thickness in 100 km ultramarathoners
title Changes in single skinfold thickness in 100 km ultramarathoners
title_full Changes in single skinfold thickness in 100 km ultramarathoners
title_fullStr Changes in single skinfold thickness in 100 km ultramarathoners
title_full_unstemmed Changes in single skinfold thickness in 100 km ultramarathoners
title_short Changes in single skinfold thickness in 100 km ultramarathoners
title_sort changes in single skinfold thickness in 100 km ultramarathoners
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3781909/
https://www.ncbi.nlm.nih.gov/pubmed/24198597
http://dx.doi.org/10.2147/OAJSM.S37035
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