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The effects of a single bout of exercise on resting energy expenditure and respiratory exchange ratio.
Jamurtas, Athanasios Z. Koutedakis, Yiannis Paschalis, Vassilis Tofas, T. Yfanti, C. Tsiokanos, A.L. Koukoulis, G. Kouretas, Dimitris Loupos, D.
Jamurtas, Athanasios Z.
Koutedakis, Yiannis
Paschalis, Vassilis
Tofas, T.
Yfanti, C.
Tsiokanos, A.L.
Koukoulis, G.
Kouretas, Dimitris
Loupos, D.
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2004
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Abstract
We investigated the effects of a single bout of aerobic and resistance exercise of similar relative intensity and duration on resting energy expenditure (REE) and substrate utilisation. Ten young healthy males volunteered [age 22 (1.8) years, weight 76 (7.9) kg, height 176 (4.1) cm, percentage body fat 10.5 (4.0)%; mean (SEM)]. They randomly underwent three conditions in which they either lifted weights for 60 min at 70-75% of 1-RM (WL), ran for 60 min at 70-75% of maximal oxygen intake (R) or did not exercise (C). REE and substrate utilisation, determined via respiratory exchange ratio ( R), were measured prior to exercise, and 10, 24, 48 and 72 h post-exercise. It was revealed that REE was significantly elevated ( P<0.05) 10 and 24 h after the end of WL [2,124 (78) and 2,081 (76) kcal, respectively] compared to pre-exercise [1,972 (82) kcal]. REE was also significantly increased ( P<0.05) 10 and 48 h after the completion of R [2,150 (73) and 1,995 (74) kcal, respectively] compared to pre-exercise data [1,862 (70) kcal]. R was lower 10 and 24 h following either WL or R [0.813 (0.043); 0.843 (0.040) and 0.818 (0.021); 0.832 (0.021), respectively] compared to baseline measurements [0.870 (0.025) and 0.876 (0.04), respectively]. Creatine kinase was significantly elevated ( P<0.05) 24 h after both WL and R, whereas delayed onset muscle soreness became significantly elevated ( P<0.05) 24 h after only WL. There were no significant changes for any treatment in thyroid hormones (T(3) and T(4)). These results suggest that a single bout of either WL or R exercise, characterised by the same relative intensity and duration, increase REE and fat oxidation for at least 24 h post-exercise.
Citation
European Journal of Applied Physiology, 92(4-5): 393-398
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PubMed ID
15205961
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Journal article
Language
en
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ISSN
1439-6319