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ORIGINAL ARTICLE EXERCISE PHYSIOLOGY AND BIOMECHANICS
The Journal of Sports Medicine and Physical Fitness 2021 May;61(5):625-35
DOI: 10.23736/S0022-4707.20.11131-9
Copyright © 2020 EDIZIONI MINERVA MEDICA
language: English
Modifications of viscoelastic properties and physiological parameters after performing uphill and downhill running trials
Pablo J. BASCUAS, Ana V. BATALLER-CERVERO ✉, Héctor GUTIERREZ, César BERZOSA
San Jorge University, Campus Universitario, Villanueva de Gállego, Spain
BACKGROUND: Trail running performance depends on many factors, including energy cost of running, biomechanical parameters and stiffness. The aim of this study was to examine the influence of different positive and negative slopes on metabolic cost, tight hemoglobin saturation, viscoelastic properties, and vertical peak impacts in physically active young runners.
METHODS: Nine healthy male volunteers (26±5 years) performed two separate uphill and downhill sessions on an instrumented treadmill; both sessions were completed in a random order at a constant running speed with variable slopes from 0% to ±20%. Oxygen uptake (V̇O
RESULTS: During downhill running, V̇O
CONCLUSIONS: Metabolic demand increased proportionally with the uphill slope and showed a linear negative relationship with a light and moderate downhill slope. Vertical impacts of high G-forces increased during downhill running, data that indicate the importance of our ability to attenuate impacts. Finally, muscle tone and stiffness remained stable at all times, results that demonstrated their acute adaptation to running in the absence of extreme fatigue.
KEY WORDS: Muscles; Running; Sports