ArticleEuropean journal of applied physiology2026
Oxygen uptake on-kinetics during horizontal and uphill treadmill running in moderate- and severe-intensity domains.
Article in European journal of applied physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo compare pulmonary oxygen uptake ([Formula: see text]) on-kinetics during level and uphill treadmill running performed within moderate- and severe-intensity domains in trained trail runners.
methodsThirteen trail runners completed: (I) a traditional 3 min stage treadmill incremental test and (II) an incremental test at a fixed treadmill speed (50% of participant's peak speed from the first test) with a 2% gradient increase every 3 min to determine the first lactate threshold (LT
resultsDuring moderate exercise, τp and time delay did not differ between level and uphill running, whereas the primary [Formula: see text] amplitude and post-exercise [La] were higher during uphill running (p < 0.05). In the severe domain, no differences were observed between conditions for τp, time delay, primary amplitude, or [Formula: see text] amplitude. Peak [Formula: see text] during severe exercise was higher in uphill compared with level running (p < 0.05), but values were similar to those obtained during the respective incremental tests.
conclusionsWhen exercise intensity domains are defined using slope-specific incremental testing, [Formula: see text] on-kinetics are similar between level and uphill running in trail runners. These findings support the validity of incline-based testing for physiological normalization and training prescription in uphill running contexts.
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