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Effect of time of day on aerobic and anaerobic responses to high-intensity exercise.
Can J Sport Sci 1992; 17(4):316-9CJ

Abstract

This study evaluated the effect of time of day on performance of high-intensity, constant-power cycle ergometry by both men and women. Subjects performed all-out cycle ergometer tests in the morning and in the afternoon in randomized order. For all tests, work rate was a constant 5.0 W.kg-1 (women, n = 6) or 6.0 W.kg-1 (men, n = 8). Total work performed was 9.6% greater in the afternoon (mean +/- SE, 348.8 +/- 40.6 J.kg-1) compared to the morning (318.2 +/- 39.5 J.kg-1). The greater amount of work in the afternoon was associated with a 5.1% higher aerobic power and a 5.6% larger anaerobic contribution. There was no interaction between gender and the effect of time of day on the aerobic or anaerobic contributions. These results provide evidence of a circadian rhythm in aerobic and anaerobic responses to high-intensity short-duration exercise, in women as well as in men.

Authors+Show Affiliations

Department of Kinesiology, University of North Texas, Denton 76203-3857.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

1330271

Citation

Hill, D W., et al. "Effect of Time of Day On Aerobic and Anaerobic Responses to High-intensity Exercise." Canadian Journal of Sport Sciences = Journal Canadien Des Sciences Du Sport, vol. 17, no. 4, 1992, pp. 316-9.
Hill DW, Borden DO, Darnaby KM, et al. Effect of time of day on aerobic and anaerobic responses to high-intensity exercise. Can J Sport Sci. 1992;17(4):316-9.
Hill, D. W., Borden, D. O., Darnaby, K. M., Hendricks, D. N., & Hill, C. M. (1992). Effect of time of day on aerobic and anaerobic responses to high-intensity exercise. Canadian Journal of Sport Sciences = Journal Canadien Des Sciences Du Sport, 17(4), pp. 316-9.
Hill DW, et al. Effect of Time of Day On Aerobic and Anaerobic Responses to High-intensity Exercise. Can J Sport Sci. 1992;17(4):316-9. PubMed PMID: 1330271.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of time of day on aerobic and anaerobic responses to high-intensity exercise. AU - Hill,D W, AU - Borden,D O, AU - Darnaby,K M, AU - Hendricks,D N, AU - Hill,C M, PY - 1992/12/1/pubmed PY - 1992/12/1/medline PY - 1992/12/1/entrez SP - 316 EP - 9 JF - Canadian journal of sport sciences = Journal canadien des sciences du sport JO - Can J Sport Sci VL - 17 IS - 4 N2 - This study evaluated the effect of time of day on performance of high-intensity, constant-power cycle ergometry by both men and women. Subjects performed all-out cycle ergometer tests in the morning and in the afternoon in randomized order. For all tests, work rate was a constant 5.0 W.kg-1 (women, n = 6) or 6.0 W.kg-1 (men, n = 8). Total work performed was 9.6% greater in the afternoon (mean +/- SE, 348.8 +/- 40.6 J.kg-1) compared to the morning (318.2 +/- 39.5 J.kg-1). The greater amount of work in the afternoon was associated with a 5.1% higher aerobic power and a 5.6% larger anaerobic contribution. There was no interaction between gender and the effect of time of day on the aerobic or anaerobic contributions. These results provide evidence of a circadian rhythm in aerobic and anaerobic responses to high-intensity short-duration exercise, in women as well as in men. SN - 0833-1235 UR - https://www.unboundmedicine.com/medline/citation/1330271/Effect_of_time_of_day_on_aerobic_and_anaerobic_responses_to_high_intensity_exercise_ DB - PRIME DP - Unbound Medicine ER -