English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Purpose:  To provide insights into the energy requirements as well as the physiological adaptations of an experienced 50-year-old ultra-marathon male athlete during the world's most challenging mountain ultra-marathon (MUM).   Methods:  The international race supporting the study was the Tor des Geants®, characterized by 330 km with +24,000 m D+ to be covered within 150 h. Before the MUM, we assessed the peak oxygen uptake (V  ˙    O   2  peak) by means of an incremental graded running test. During the MUM we monitored six ascents (once per race day) with a portable gas analyzer, a GPS and a finger pulse oximeter. We then calculated the net metabolic cost per unit of distance (C), the vertical metabolic cost (C vert ) and the mechanical efficiency of locomotion (Eff mech ) throughout the six uphills monitored. We further monitored the distance covered, speed, altimetry and D+ from the GPS data as well as the pulse oxygen saturation with the finger pulse oximeter.   Results:  Subject'sV  ˙    O   2  peakwas 48.1 mL·kg −1 ·min −1 . Throughout the six uphills investigated the mean exercise intensity was 57.3 ± 6.0%V  ˙    O   2  peakand 68.0 ± 8.7% HR peak . C, C vert  and Eff mech  were 11.4 ± 1.9 J·kg −1 ·m −1 , 57.9 ± 15.2 J·kg −1 ·    m   vert    −  1, and 17.7 ± 4.8%, respectively. The exercise intensity, as well as C, C vert , and Eff mech  did not consistently increase during the MUM.   Conclusions:  For the first time, we described the feasibility of assessing the energy requirements as well as the physiological adaptations of a MUM in ecologically valid environment settings. The present case study shows that, despite the distance performed during the MUM, our participant did not experience a metabolic fatigue state. This is likely due to improvements in locomotor efficiency as the race progressed.

The Energetics during the World's Most Challenging Mountain Ultra-Marathon—A Case Study at the Tor des Geants®