Physiological factors determining downhill vs uphill running endurance performance

Recent studies investigated the determinants of trail running performance (i.e., combining uphill (UR) and downhill running sections (DR)), while the possible specific physiological factors specifically determining UR vs DR performances (i.e., isolating UR and DR) remain presently unknown. This stud...

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Published in:Journal of science and medicine in sport Vol. 24; no. 1; pp. 85 - 91
Main Authors: Lemire, Marcel, Hureau, Thomas J., Favret, Fabrice, Geny, Bernard, Kouassi, Blah Y.L., Boukhari, Mourad, Lonsdorfer, Evelyne, Remetter, Romain, Dufour, Stéphane P.
Format: Journal Article
Language:English
Published: Australia Elsevier Ltd 01.01.2021
Elsevier Limited
Elsevier
Subjects:
Ability tests
Adult
Athletes
Athletic Performance - physiology
Carbon dioxide
Carbon Dioxide - metabolism
Eccentric exercise
Elasticity - physiology
Endurance
Exercise
Heart rate
Humans
Lactic Acid - blood
Leg - physiology
Life Sciences
Male
Oxygen consumption
Oxygen Consumption - physiology
Physical Endurance - physiology
Physical fitness
Physiology
Respiratory Rate - physiology
Running
Running - physiology
Tidal Volume - physiology
Time Factors
Time-trial
Track and field
Trails
Training
Velocity
Ventilation
Warm up (exercise)
Italy
Germany
Heart rate
Oxygen consumption
Ventilation
Track and field
Eccentric exercise
Time-trial
ISSN:1440-2440, 1878-1861, 1878-1861
Online Access:Get full text
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Summary:Recent studies investigated the determinants of trail running performance (i.e., combining uphill (UR) and downhill running sections (DR)), while the possible specific physiological factors specifically determining UR vs DR performances (i.e., isolating UR and DR) remain presently unknown. This study aims to determine the cardiorespiratory responses to outdoor DR vs UR time-trial and explore the determinants of DR and UR performance in highly trained runners. Randomized controlled trial. Ten male highly-trained endurance athletes completed 5-km DR and UR time-trials (average grade: ±8%) and were tested for maximal oxygen uptake, lower limb extensor maximal strength, local muscle endurance, leg musculotendinous stiffness, vertical jump ability, explosivity/agility and sprint velocity. Predictors of DR and UR performance were investigated using correlation and commonality regression analyses. Running velocity was higher in DR vs UR time-trial (20.4±1.0 vs 12.0±0.5km·h−1, p<0.05) with similar average heart rate (95±2% vs 94±2% maximal heart rate; p>0.05) despite lower average V̇O2 (85±8% vs 89±7% V̇O2max; p<0.05). Velocity at V̇O2max (vV̇O2max) body mass index (BMI) and maximal extensor strength were significant predictors of UR performance (r2=0.94) whereas vV̇O2max, leg musculotendinous stiffness and maximal extensor strength were significant predictors of DR performance (r2=0.84). Five-km UR and DR running performances are both well explained by three independent predictors. If two predictors are shared between UR and DR performances (vV̇O2max and maximal strength), their relative contribution is different and, importantly, the third predictor appears very specific to the exercise modality (BMI for UR vs leg musculotendinous stiffness for DR).
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ISSN:1440-2440
1878-1861
1878-1861
DOI:10.1016/j.jsams.2020.06.004