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|Title: ||Individual variation in hunger, energy intake and ghrelin responses to acute exercise|
|Authors: ||King, James A.|
Broom, David R.
Wasse, Lucy K.
Douglas, Jessica A.
Burns, Stephen F.
Petherick, Emily S.
Batterham, Rachel L.
Thackray, Alice E.
Yates, Thomas E.
Stensel, David J.
|Keywords: ||Physical activity|
|Issue Date: ||2017|
|Publisher: ||© American College of Sports Medicine (ACSM)|
|Citation: ||KING, J.A. ...et al., 2017. Individual variation in hunger, energy intake and ghrelin responses to acute exercise. Medicine and Science in Sports and Exercise, 49 (6), pp. 1219–1228.|
|Abstract: ||Purpose: To characterise the immediate and extended impact of acute exercise on hunger, energy intake and circulating acylated ghrelin concentrations using a large dataset of homogenous experimental trials; and to describe the variation in responses between individuals. Methods: Data from 17 of our group’s experimental crossover trials were aggregated yielding a total sample of 192 young, healthy, males. In these studies, single bouts of moderate to high-intensity aerobic exercise (69 ± 5% VO2 peak; mean ± SD) were completed with detailed participant assessments occurring during and for several hours post-exercise. Mean hunger ratings were determined during (n = 178) and after (n = 118) exercise from visual analogue scales completed at 30 min intervals whilst ad libitum energy intake was measured within the first hour after exercise (n = 60) and at multiple meals (n = 128) during the remainder of trials. Venous concentrations of acylated ghrelin were determined at strategic time points during (n = 118) and after (n = 89) exercise. Results: At group-level, exercise transiently suppressed hunger (P < 0.010; Cohen’s d = 0.77) but did not affect energy intake. Acylated ghrelin was suppressed during exercise (P < 0.001; Cohen’s d = 0.10) and remained significantly lower than control (no exercise) afterwards (P < 0.024; Cohen’s d = 0.61). Between participants, there were notable differences in responses however a large proportion of this spread lay within the boundaries of normal variation associated with biological and technical assessment error. Conclusion: In young men, acute exercise suppresses hunger and circulating acylated ghrelin concentrations with notable diversity between individuals. Care must be taken to distinguish true inter-individual variation from random differences within normal limits.|
|Description: ||This paper is in closed access until June 2018.|
|Sponsor: ||This research was supported by the National Institute for Health Research (NIHR) Diet, Lifestyle and Physical Activity Biomedical Research Unit based at University Hospitals of Leicester and Loughborough University.|
|Version: ||Accepted for publication|
|Publisher Link: ||https://doi.org/10.1249/MSS.0000000000001220|
|Appears in Collections:||Closed Access (Sport, Exercise and Health Sciences)|
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