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Int J Sports Med 2017; 38(11): 819-826
DOI: 10.1055/s-0043-112342
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Performance Factors in a Mountain Ultramarathon

Pascal Balducci
1   Univ Lyon – University Claude Bernard Lyon 1, EA 7424 – Inter-university Laboratory of Human Movement Science
,
Michel Clémençon
1   Univ Lyon – University Claude Bernard Lyon 1, EA 7424 – Inter-university Laboratory of Human Movement Science
,
Robin Trama
1   Univ Lyon – University Claude Bernard Lyon 1, EA 7424 – Inter-university Laboratory of Human Movement Science
,
Yoann Blache
1   Univ Lyon – University Claude Bernard Lyon 1, EA 7424 – Inter-university Laboratory of Human Movement Science
,
Christophe Hautier
1   Univ Lyon – University Claude Bernard Lyon 1, EA 7424 – Inter-university Laboratory of Human Movement Science
› Author Affiliations
Further Information

Publication History



accepted 18 May 2017

Publication Date:
10 August 2017 (online)

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Abstract

This study aimed to determine mountain ultra-marathon (MUM) performance factors in a large group of endurance mountain runners. Maximal aerobic speed (MAS) was assessed one week prior to the MUM. The level and graded (10%) energy cost of running, stiffness, knee extensors force (KEf), and jump height on a counter movement jump (CMJ) were measured in 24 male ultra runners before (pre) and immediately after (post) the Interlacs Trail (75 km and 3 930/3 700 m d+/d−). Performance time was correlated with MAS (r=− 0.74, p<0.001), fraction of MAS (FMAS) sustained (r=− 0.89, p<0.001), KEf (r=− 0.51, p<0.05), and KEf loss (r=− 0.51, p<0.05). A multiple regression analysis was performed using performance time in minutes (T) and the calculated individual characteristics, resulting in T=− 11.852×FMAS−37.195×MAS−0.118×KEf+2090.581 (R2=0.98, with 95% confidence interval). Contrary to expectations, performance was neither correlated to the level or uphill energy cost of running nor to the changes of these costs post-MUM. To perform in a MUM, training should take into account muscle strength of the KE, MAS and FMAS.

Key words

trail running - running economy - step frequency - isometric force - energy cost of running
 

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