[Effects of recovery duration and time of day on sprint performance].
Effects of recovery duration (2-3 s, 15 s, 30 s, 1 min, and 2 min) and time of day (9 a.m., 2 p.m., and 6 p.m.) on sprint performance were studied in 9 subjects using a cycle ergometer. The peak power (Ppeak) and the total work performed (W) were determined from changes in instantaneous power, taking into account the inertia of the flywheel. A decrease in Ppeak and W was observed after 15 s and 2-3 s recovery (p < 0.001). A logarithmic relationship (y = 3.92 ln x + 81.5; r = 0.82; n = 9) was found between Ppeak (%Ppeak of the first sprint) and the duration of the recovery (half-time = 14.3 s; SD = 7.6). Data indicated that there was no significant effect of time of day on Ppeak and W, regardless of the duration of recovery. The recovery processes occurred in a very short time and did not seem to be affected by biological rhythms.
Falgairette
Guy
G
Laboratoire d'Ergonomie Sportive et Performance, Université de Toulon Var, BP 132-83 957 La Garde, France.
Billaut
François
F
Ramdani
Sophiane
S
D000328:Adult; D002940:Circadian Rhythm / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D008297:Male; D012420:Running / Q000502:physiology*; D013997:Time Factors