The eccentric muscle loading influences the pacing strategies during repeated downhill sprint intervals.
The purpose was to compare self-chosen pace during ten repetitions of 60 m running sprints performed on a level surface (SPL), or when running uphill (SPU) or downhill (SPD) on a 4.7% slope. When expressed as percent of maximal running speed for corresponding condition, SPD was lower than SPL (95.28 +/- 1.93 vs. 97.31 +/- 1.29%; P = 0.044), which was lower than SPU (97.31 +/- 1.29 vs. 98.09 +/- 0.74%; P = 0.026). Heart rates, blood lactate concentrations and general perceived exertion were lower during SPD (163.8 +/- 8.3 bpm, 11.66 +/- 1.24 mmol L( -1), and 4.1 +/- 1.0) than SPL (169.8 +/- 7.8 bpm, 13.69 +/- 0.33 mmol L(-1), and 5.8 +/- 0.6), which were lower than SPU (174.9 +/- 8.7 bpm, 15.27 +/- 0.02, mmol L(-1), and 6.3 +/- 0.5) (P < 0.05 for all analyzes). Results show that the level of eccentric muscle loading influences the pacing strategy.
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Faculté des Sciences de l'Homme et de l'Environnement, Département STAPS, Centre Universitaire de Recherches en Activités Physiques et Sportives, Université de La Réunion, 117, Le Tampon, France. bertrand.baron@univ-reunion.fr
Deruelle
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Moullan
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Dalleau
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Verkindt
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Noakes
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D000328:Adult; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008465:Mechanoreceptors / Q000378:metabolism; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D005082:Physical Exertion; D012420:Running / Q000502:physiology*