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ULTIMO FASCICOLOTHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport

Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111

Periodicità: Mensile

ISSN 0022-4707

Online ISSN 1827-1928

 

The Journal of Sports Medicine and Physical Fitness 2016 Ottobre;56(10):1103-12

EXERCISE PHYSIOLOGY AND BIOMECHANICS 

 ORIGINAL ARTICLES

Influence of recovery intensity on oxygen demand and repeated sprint performance

Takaki YAMAGISHI, John BABRAJ

Division of Sport and Exercise Sciences, Abertay University, Dundee, Scotland, UK

BACKGROUND: This study aimed to determine effects of recovery intensity (passive, 20%, 30% and 40% V̇O2peak) on oxygen uptake kinetics, performance and blood lactate accumulation during repeated sprints.
METHODS: Seven moderately-trained male participants (V̇O2peak: 48.1±5.1 mL/kg/min) performed four 30-second repeated Wingate tests on four separate occasions.
RESULTS: Recovery of V̇O2 between sprints was prolonged with recovery intensity (time required to reach 50% V̇O2peak: passive: 50±9 s; 20%: 81±17 s; 30%: 130±43 s; 40%: 188±62 s, P<0.001), while V̇O2-to-sprint work ratio was mainly increased by the higher intensities (passive: 138±17 mL/min/kJ; 20%: 149±14 mL/min/kJ; 30%: 159±15 mL/min/kJ; 40%: 158±17 mL/min/kJ, P=0.001). The decline in peak power tended to be greater in the higher intensity conditions during sprint 2 (passive: 7.4±5.4%; 20%: 5.8±7.9%; 30%: 12.7±7.4%; 40%: 12.7±5.5%, P=0.052), whereas average power was less decreased with recovery intensity during sprint 4 (passive: 22.4±8.9%; 20%: 19.9±6.1%; 30%: 18.4±7.3%; 40%: 16.6±6.2%, P=0.036). Blood lactate was not different with recovery intensity (P=0.251).
CONCLUSIONS: The present study demonstrated that while the higher recovery intensities induce prolonged oxygen recovery and impaired peak power restoration during the initial sprints, those intensities provide a greater aerobic contribution to sprint performance, resulting in better power maintenance during the latter sprints.

lingua: Inglese


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