ArticleExtreme physiology & medicine2015
The increase in hydric volume is associated to contractile impairment in the calf after the world's most extreme mountain ultra-marathon.
Article in Extreme physiology & medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 22 citations in OpenAlex.
- Physiology of lived experience: Cruising among the Swiss peaks.Experimental physiology · 2026Article
- Review
- The relationship between lower extremity swelling, quadriceps strength, and functional performance following total knee arthroplasty.The Knee · 2019Observational
- Body Composition Changes During a 24-h Winter Mountain Running Race Under Extremely Cold Conditions.Frontiers in physiology · 2019Article
- Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon.Frontiers in physiology · 2018Article
- Article
- Extreme Mountain Ultra-Marathon Leads to Acute but Transient Increase in Cerebral Water Diffusivity and Plasma Biomarkers Levels Changes.Frontiers in physiology · 2016Article
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundStudies have recently focused on the effect of running a mountain ultra-marathon (MUM) and their results show muscular inflammation, damage and force loss. However, the link between peripheral oedema and muscle force loss is not really established. We tested the hypothesis that, after a MUM, lower leg muscles' swelling could be associated with muscle force loss. The knee extensor (KE) and the plantar flexor (PF) muscles' contractile function was measured by supramaximal electrical stimulations, potentiated low- and high-frequency doublets (PS10 and PS100) of the KE and the PF were measured by transcutaneous electrical nerve stimulation and bioimpedance was used to assess body composition in the runners (n = 11) before (Pre) and after (Post) the MUM and compared with the controls (n = 8).
resultsThe maximal voluntary contraction of the KE and the PF significantly decreased by 20 % Post-MUM in the runners. Hydration of the non-fat mass (NF-Hyd) and extracellular water volume (Ve) were increased by 12 % Post-MUM (p < 0.001) in the runners. Calf circumference (+2 %, p < 0.05) was also increased. Significant relationships were found for percentage increases in Ve and NF-Hyd with percentage decrease in PS10 of the PF (r = -0.68 and r = -0.70, p < 0.05) and with percentage increase of calf circumference (r = 0.72 and r = 0.73, p < 0.05) in the runners.
conclusionsThe present study suggests that increases in circumference and in hydric volume are associated to contractile impairment in the calf in ultra-marathon runners.
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