The effects of work–rest duration on intermittent exercise and subsequent performance
Deutscher übersetzter Titel: | Die Auswirkungen der Dauer von Arbeits-Ruhe-Phasen auf intermittierende Belastung und nachfolgende Leistungsfähigkeit |
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Autor: | Price, Mike; Halabi, Karl |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 23 (2005), 8, S. 835-842, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640410400021971 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201312008889 |
Quelle: | BISp |
Abstract des Autors
This study examined the effects of different work – rest durations during 40 min intermittent treadmill exercise and subsequent running performance. Eight males (mean ± s: age 24.3 ± 2.0 years, body mass 79.4 ± 7.0 kg, height 1.77 ± 0.05 m) undertook intermittent exercise involving repeated sprints at 120% of the speed at which maximal oxygen uptake (v-[Vdot]O2max) was attained with passive recovery between each one. The work – rest ratio was constant at 1:1.5 with trials involving short (6:9 s), medium (12:18 s) or long (24:36 s) work – rest durations. Each trial was followed by a performance run to volitional exhaustion at 150% v-[Vdot]O2max. After 40 min, mean exercise intensity was greater during the long (68.4 ± 9.3%) than the short work – rest trial (54.9 ± 8.1% [Vdot]O2max; P < 0.05). Blood lactate concentration at 10 min was higher in the long and medium than in the short work – rest trial (6.1 ± 0.8, 5.2 ± 0.9, 4.5 ± 1.3 mmol · l−1, respectively; P < 0.05). The respiratory exchange ratio was consistently higher during the long than during the medium and short work – rest trials (P < 0.05). Plasma glucose concentration was higher in the long and medium than in the short work – rest trial after 40 min of exercise (5.6 ± 0.1, 6.6 ± 0.2 and 5.3 ± 0.5 mmol · l−1, respectively; P < 0.05). No differences were observed between trials for performance time (72.7 ± 14.9, 63.2 ± 13.2, 57.6 ± 13.5 s for the short, medium and long work – rest trial, respectively; P = 0.17), although a relationship between performance time and 40 min plasma glucose was observed (P < 0.05). The results show that 40 min of intermittent exercise involving long and medium work – rest durations elicits greater physiological strain and carbohydrate utilization than the same amount of intermittent exercise undertaken with a short work – rest duration. Verf.-Referat