The Effect of Resistance Exercise Priming in the Morning on Afternoon Sprint Cross-Country Skiing Performance
| Autor: | Thomas Losnegard, Even B. Dahl, Bjarne Rud, Gøran Paulsen, Eivind Øygard |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Male
business.industry VO2 max Resistance Training Physical Therapy Sports Therapy and Rehabilitation Squat Isometric exercise Athletic Performance Sitting Confidence interval Oxygen Consumption Sprint Skiing Anesthesia Exercise Test Humans Medicine Orthopedics and Sports Medicine Treadmill business Exercise Morning |
| Zdroj: | International Journal of Sports Physiology and Performance. 16:1786-1793 |
| ISSN: | 1555-0273 1555-0265 |
| DOI: | 10.1123/ijspp.2020-0881 |
| Popis: | Purpose: We tested whether a single session of heavy-load resistance priming conducted in the morning improved double-poling (DP) performance in the afternoon. Methods: Eight national-level male cross-country skiers (mean [SD]: 23 [3] y, 184 [6] cm, 73 [7] kg, maximum oxygen consumption = 69 [6] mL·kg−1·min−1) carried out 2 days of afternoon performance tests. In the morning, 5 hours before tests, subjects were counterbalanced to either a session of 3 × 3 repetitions (approximately 85%–90% 1-repetition maximum) of squat and sitting pullover exercises or no exercise. The performance was evaluated in DP as time to exhaustion (TTE) (approximately 3 min) on a treadmill and 30-m indoor sprints before and after TTE (30-m DP pre/post). Furthermore, submaximal DP oxygen cost, countermovement jump, and isometric knee-extension force during electrical stimulation were conducted. Participants reported perceived readiness on test days. Results: Resistance exercise session versus no exercise did not differ for TTE (approximately 3 min above) (mean ± 95% confidence interval = 3.6% ± 6.0%; P = .29; effect size [ES], Cohen d = 0.27), 30-m DP pre (−0.56% ± 0.80%; P = .21; ES = 0.20), 30-m DP post (−0.18% ± 1.13%; P = .76; ES = 0.03), countermovement jump (−2.0% ± 2.8%; P = .21; ES = 0.12), DP oxygen cost (−0.13% ± 2.04%; P = .91; ES = 0.02), or perceived readiness (P ≥ .11). Electrical stimulation force was not different in contraction or relaxation time but revealed low-frequency fatigue in the afternoon for the resistance exercise session only (−12% [7%]; P = .01; ES = 1.3). Conclusion: A single session of heavy-load, low-volume resistance exercise in the morning did not increase afternoon DP performance of short duration in high-level skiers. However, leg low-frequency fatigue after resistance priming, together with the presence of small positive effects in 2 out of 3 DP tests, may indicate that the preconditioning was too strenuous. |
| Databáze: | OpenAIRE |
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