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Casado, ArturoAutor (correspondencia)Fernandez-Del-Olmo, MiguelAutor o CoautorJimenez-Reyes, PedroAutor o Coautor

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Maximum aerobic speed, maximum oxygen consumption, and running spatiotemporal parameters during an incremental test among middle- and long-distance runners and endurance non-running athletes

Publicado en:Peerj. 10 e14035- - 2022-10-05 10(), DOI: 10.7717/peerj.14035

Autores: Casado, Arturo; Luis Tuimil, Jose; Iglesias, Xavier; Fernandez-del-Olmo, Miguel; Jimenez-Reyes, Pedro; Martin-Acero, Rafael; Rodriguez, Ferran A

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Background. Maximal aerobic speed (MAS) is a useful parameter to assess aerobic capacity and estimate training intensity in middle- and long-distance runners. However, whether middle- and long-distance runners reach different levels of MAS compared to other endurance athletes with similar VO2max has not been previously studied. Therefore, we aimed to compare VO2max, MAS and spatiotemporal parameters between sub-elite middle- and long-distance runners (n = 6) and endurance non-runners (n = 6). In addition, we aimed to compare the maximal blood lactate concentration [BLa] experienced by participants after conducting these tests. Methods. Telemetric portable respiratory gas analysis, contact and flight time, and stride length and rate were measured using a 5-m contact platform during an incremental test at a synthetic athletics track. VO2, heart rate, respiratory quotient values in any 15 s average period during the test were measured. [BLa] was analyzed after the test. Running spatiotemporal parameters were recorded at the last two steps of each 400mlap. A coefficient of variation (%CV) was calculated for each spatiotemporal variable in each participant from 8 km h(-1) onwards. Results. Whereas runners reported faster MAS (21.0 vs. 18.2 km h(-1)) than nonrunners (p = 0 :0001, ES = 3.0), no differences were found for VO2max and maximum blood lactate concentration during the running tests (p > 0.05). While significant increases in flight time and stride length and frequency (p < 0.001, 0.52 <= eta(2)(p) <= 0.8) were observed throughout the tests, decreases in contact time (p < 0.001, eta(2)(p) = 0 :9) were reported. Runners displayed a greater %CV (p= 0 :015) in stride length than nonrunners. We conclude that middle- and long-distance runners can achieve a faster MAS compared to non-running endurance athletes despite exhibiting a similar VO2max. This superior performance may be associated to a greater mechanical efficiency. Overall, runners displayed a greater ability to modify stride length to achieve fast speeds, which may be related to a more mechanically efficient pattern of spatiotemporal parameters than non-runners.

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