Dataset Information

Cycling Performance in Short-term Efforts: Laboratory and Field-Based Data in XCO Athletes.

ABSTRACT: Mountain bike cross-country Olympic has an intermittent performance profile, underlining the importance of short-term but high cycling power output. Previous findings indicate that power output during sprint tests differs between laboratory and field-based conditions and that cycling cadence rises with increasing workload. The aim was therefore to examine power output and cadence in short-term efforts under laboratory and field conditions. Twenty-three competitive athletes (17.9±3.7 years) performed a laboratory power profile test and a simulated race within one week. Power output and cadence during the power profile test were compared to corresponding short-term efforts during the race over durations of 10-300s (TT _10-300 ). Differences were TT ₁₀ +8%, TT ₃₀ +7%, TT ₆₀ -15% and TT ₃₀₀ -12% for power output and+10%,+8%,+19%,+21% for cadence respectively. Compared to the race, we found higher power output during the power profile test for the shorter efforts but lower for TT ₆₀ and TT ₃₀₀ . Confirming previous results, cadence was higher during the power profile test compared to the respective intervals of the race and increased with increasing workload or shorter time trial duration. Future research should take into account that compared to the field, a higher cadence is used in laboratory settings to produce similar power output.

SUBMITTER: Schneeweiss P

PROVIDER: S-EPMC7101247 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature

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Cycling Performance in Short-term Efforts: Laboratory and Field-Based Data in XCO Athletes.

Schneeweiss Patrick P Schellhorn Philipp P Haigis Daniel D Niess Andreas A Martus Peter P Krauss Inga I

Sports medicine international open 20200101 1

Mountain bike cross-country Olympic has an intermittent performance profile, underlining the importance of short-term but high cycling power output. Previous findings indicate that power output during sprint tests differs between laboratory and field-based conditions and that cycling cadence rises with increasing workload. The aim was therefore to examine power output and cadence in short-term efforts under laboratory and field conditions. Twenty-three competitive athletes (17.9±3.7 years) perfo ...[more]

PMID: 32232124

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Project description:BACKGROUND:Knowledge of the effect of marine protein hydrolysate (MPH) supplementation to promote recovery after high intensity performance training is scarce. The aim of this study was to examine the effect of MPH supplementation to whey protein (WP) and carbohydrate (CHO): (CHO-WP-MPH), on short-term recovery following high intensity performance, compared to an isoenergetic and isonitrogenous supplement of WP and CHO: (CHO-WP), in male cyclists. METHODS:This was a double-blinded crossover study divided into three phases. Fourteen healthy men participated. In phase I, an incremental bicycle exercise test was performed for establishment of intensities used in phase II and III. In phase II (9-16?days after phase 1), the participants performed first one high intensity performance cycling session, followed by nutrition supplementation (CHO-WP-MPH or CHO-WP) and 4 hours of recovery, before a subsequent high intensity performance cycling session. Phase III (1 week after phase II), was similar to phase II except for the nutrition supplementation, where the participants received the opposite supplementation compared to phase II. Primary outcome was difference in time to exhaustion between the cycling sessions, after nutrition supplementations containing MPH or without MPH. Secondary outcomes were differences in heart rate (HR), respiratory exchange ratio (RER), blood lactate concentration and glucose. RESULTS:The mean age of the participants was 45.6?years (range 40-58). The maximal oxygen uptake (mean?±?SD) measured at baseline was 54.7?±?4.1?ml?min-?1?kg-?1. There were no significant differences between the two nutrition supplementations measured by time to exhaustion at the cycling sessions (meandiff?=?0.85?min, p?=?0.156, 95% confidence interval (CI), -?0.37, 2.06), HR (meandiff?=?0.8 beats pr.min, p?=?0.331, 95% CI, -?0.9, 2.5), RER (meandiff?=?-?0.05, p?=?0.361, 95% CI -0.07 - 0.17), blood lactate concentration (meandiff?=?-?0.24, p?=?0.511, 95% CI, -?1.00, 0.53) and glucose (meandiff?=?0.23, p?=?0.094, 95% CI, -?0.05, 0.51). CONCLUSIONS:A protein supplement with MPH showed no effects on short-term recovery in middle-aged healthy male cyclists compared to a protein supplement without MPH. TRIAL REGISTRATION:The study was registered 02.05.2017 at ClinicalTrials.gov (Protein Supplements to Cyclists, NCT03136133 , https://clinicaltrials.gov/ct2/show/NCT03136133?cond=marine+peptides&rank=1 .

Dataset Information

Cycling Performance in Short-term Efforts: Laboratory and Field-Based Data in XCO Athletes.

Publications

Cycling Performance in Short-term Efforts: Laboratory and Field-Based Data in XCO Athletes.

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