title: Associations between sleep parameters and food reward.
abstract: This study examined the effects of acute, isocaloric aerobic and resistance exercise on different sleep parameters, and whether changes in these sleep parameters between sessions were related to next morning food reward. Fourteen men and women (age: 21.9 ± 2.7 years; body mass index: 22.7 ± 1.9 kg m(-) ²) participated in three randomized crossover sessions: aerobic exercise; resistance exercise; and sedentary control. Target exercise energy expenditure was matched at 4 kcal kg(-1) of body weight, and performed at 70% of VO2peak or 70% of 1 repetition-maximal. Sleep was measured (accelerometry) for 22 h following each session. The 'wanting' for visual food cues (validated computer task) was assessed the next morning. There were no differences in sleep parameters and food 'wanting' between conditions. Decreases in sleep duration and earlier wake-times were significantly associated with increased food 'wanting' between sessions (P = 0.001). However, these associations were no longer significant after controlling for elapsed time between wake-time and the food reward task. These findings suggest that shorter sleep durations and earlier wake-times are associated with increased food reward, but these associations are driven by elapsed time between awakening and completion of the food reward task.
authors: Behavioural and Metabolic Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON, Canada.
authors: Jessica
authors: J
authors: McNeil
authors: Behavioural and Metabolic Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON, Canada.
authors: Sébastien
authors: S
authors: Cadieux
authors: BioPsychology Group, Institute of Psychological Sciences, University of Leeds, Leeds, UK.
authors: Graham
authors: G
authors: Finlayson
authors: BioPsychology Group, Institute of Psychological Sciences, University of Leeds, Leeds, UK.
authors: John E
authors: JE
authors: Blundell
authors: Behavioural and Metabolic Research Unit, School of Human Kinetics, University of Ottawa, Ottawa, ON, Canada.
authors: Éric
authors: É
authors: Doucet
mesh_terms: D015992:Body Mass Index; D001835:Body Weight; D018592:Cross-Over Studies; D003463:Cues; D004734:Energy Metabolism / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005260:Female; D005502:Food; D006801:Humans; D006815:Hunger / Q000502:physiology; D008297:Male; D055070:Resistance Training; D012201:Reward; D057185:Sedentary Behavior; D012890:Sleep / Q000502:physiology*; D013997:Time Factors; D014851:Wakefulness / Q000502:physiology; D055815:Young Adult
keywords: exercise modality; food seeking; sleep patterns