Standard postural parameters in EO and EC.

<p>R  =  Runners; C  =  Control Group;</p><p>*p<0.05 compared with PRE;</p><p>p<0.05 compared with MID;</p><p>^# p<0.05,</p><p>^## p<0.01, compared with RUNNERS.</p

Main characteristics of the different groups.

<p>Data are mean ± SD. Training volume was considered for the past trail running season. Mid-: during the run at Donnas, km 148.7. Post-: about 30 minutes after the race, at Courmayeur. Sleep represents the sleeping time accumulated at Mid- and Post-. #: P<0.001 for differences between control and other groups.</p

Main characteristics of the runners and the control group.

<p>***p<0.001 compared with Runners.</p

Amplitude of the potentiated doublet (PS100) prior to (Pre-), in the middle of (Mid-) and after (Post-) the race for knee extensors (KE, panel A) and plantar flexors (PF, panel B).

<p>A two-way repeated measure ANOVA was used complemented by a Bonferroni post-hoc test. Values are mean ± SE.</p

GPS track of the entire run with the three test session locations and the distance scale in km.

<p>GPS track of the entire run with the three test session locations and the distance scale in km.</p

Evolution of Stabilogram-diffusion parameters (EO). A–D.

<p>Medio-lateral direction, <b>E–H.</b> Antero-posterior direction.</p

Decrease in MVC force for UTMB (Ultra-Trail du Mont-Blanc), the TdG (Tor des Geants) and TdG at mid-race (Mid) for the knee extensors (KE, panel A) and the plantar flexors (PF, panel B) and decrease in peak twitch for the UTMB, the TdG and TdG Mid for the knee extensors (panel C) and the plantar flexors (panel D).

<p>Unpaired t-tests were used. Data are given in changes from Pre- values.</p

Graphical evolution of Stabilogram-diffusion in the medio-lateral (ML) and antero-posterior (AP) plane for the two groups of subjects during the three sessions of measurements during the race.

<p>A: EO condition, B: EC condition.</p

Evolution of Stabilogram-diffusion parameters (EC). A–D.

<p>Medio-lateral direction, <b>E–H.</b> Antero-posterior direction.</p

Description of Stabilogram-diffusion slope.

<p>Description of Stabilogram-diffusion slope.</p