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Effect of an acute fast on energy compensation and feeding behaviour in lean men and women

Effect of an acute fast on energy compensation and feeding behaviour in lean men and women
Effect of an acute fast on energy compensation and feeding behaviour in lean men and women
AIM: Humans appear to defend against energy deficit to a greater extent than energy surplus. Severe dietary energy restriction resulting in 5-30% weight loss often leads to hyperphagia and weight regain in lean subjects. However, the period of time over which fasting is often endured in Western society are far shorter, ~1-2 days. This study examined how a 36 h fast effected the subsequent day's energy and nutrient intake in a group of 24 healthy, lean men and women.
METHOD: Subjects underwent two 2 day treatments, termed 'fast' and 'maintenance'. During the 'fast' treatment, subjects were fed a maintenance diet on the day prior to the fast (day -1) to prevent overeating. They then consumed non-energy drinks only, from 20:00 h on day -1 to 08:00 h on day 2 (ad libitum feeding day), thus fasting for 36 h. On the 'maintenance' protocol, subjects received a maintenance diet throughout day 1. Throughout day 2 they had ad libitum access to a range of familiar foods, which were the same for both treatments. Body weight, blood glucose and respiratory quotient were used as compliance checks. Hunger was monitored on day's -1, 1 and 2 for the fast treatment only.
RESULTS: On day 2, average energy intake was 10.2 vs 12.2 MJ/day (s.e.d. 1.0) on the post-maintenance and post-fast periods, respectively (P=0.049). Subjects altered feeding behaviour, in response to the fast, only at breakfast time, selecting a higher-fat meal (P<0.005). Compared to day -1, motivation to eat was elevated during the fast (P<0.05). This continued until breakfast was consumed during the re-feeding period (day 2), when values then returned to baseline.
CONCLUSION: These data suggest that a 36 h fast, which generated a negative energy balance of ~12 MJ, did not induce a powerful, unconditioned stimulus to compensate on the subsequent day.
fasting, hunger, appetite, feeding behaviour, macronutrient selection
1623-1628
Johnstone, A. M.
76fcc7f6-1191-4cab-9b0a-370b9c25cf3e
Faber, P.
9ece510d-6c18-4aaa-8241-fe9990c0f934
Gibney, E. R.
684b69a9-3c68-4ded-96c8-092ef62b6213
Elia, M.
964bf436-e623-46d6-bc3f-5dd04c9ef4c1
Horgan, G.
4fd13009-291f-4337-bf5b-31f2384deeaa
Golden, B. E.
5c150ca6-5cc0-45fe-8e1c-f1fab5a9332f
Stubbs, R. J.
a7099c13-6481-4255-8ab1-3934e5ea1409
Johnstone, A. M.
76fcc7f6-1191-4cab-9b0a-370b9c25cf3e
Faber, P.
9ece510d-6c18-4aaa-8241-fe9990c0f934
Gibney, E. R.
684b69a9-3c68-4ded-96c8-092ef62b6213
Elia, M.
964bf436-e623-46d6-bc3f-5dd04c9ef4c1
Horgan, G.
4fd13009-291f-4337-bf5b-31f2384deeaa
Golden, B. E.
5c150ca6-5cc0-45fe-8e1c-f1fab5a9332f
Stubbs, R. J.
a7099c13-6481-4255-8ab1-3934e5ea1409

Johnstone, A. M., Faber, P., Gibney, E. R., Elia, M., Horgan, G., Golden, B. E. and Stubbs, R. J. (2002) Effect of an acute fast on energy compensation and feeding behaviour in lean men and women. International Journal of Obesity and Related Metabolic Disorders, 26 (12), 1623-1628. (doi:10.1038/sj.ijo.0802151).

Record type: Article

Abstract

AIM: Humans appear to defend against energy deficit to a greater extent than energy surplus. Severe dietary energy restriction resulting in 5-30% weight loss often leads to hyperphagia and weight regain in lean subjects. However, the period of time over which fasting is often endured in Western society are far shorter, ~1-2 days. This study examined how a 36 h fast effected the subsequent day's energy and nutrient intake in a group of 24 healthy, lean men and women.
METHOD: Subjects underwent two 2 day treatments, termed 'fast' and 'maintenance'. During the 'fast' treatment, subjects were fed a maintenance diet on the day prior to the fast (day -1) to prevent overeating. They then consumed non-energy drinks only, from 20:00 h on day -1 to 08:00 h on day 2 (ad libitum feeding day), thus fasting for 36 h. On the 'maintenance' protocol, subjects received a maintenance diet throughout day 1. Throughout day 2 they had ad libitum access to a range of familiar foods, which were the same for both treatments. Body weight, blood glucose and respiratory quotient were used as compliance checks. Hunger was monitored on day's -1, 1 and 2 for the fast treatment only.
RESULTS: On day 2, average energy intake was 10.2 vs 12.2 MJ/day (s.e.d. 1.0) on the post-maintenance and post-fast periods, respectively (P=0.049). Subjects altered feeding behaviour, in response to the fast, only at breakfast time, selecting a higher-fat meal (P<0.005). Compared to day -1, motivation to eat was elevated during the fast (P<0.05). This continued until breakfast was consumed during the re-feeding period (day 2), when values then returned to baseline.
CONCLUSION: These data suggest that a 36 h fast, which generated a negative energy balance of ~12 MJ, did not induce a powerful, unconditioned stimulus to compensate on the subsequent day.

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More information

Published date: 2002
Keywords: fasting, hunger, appetite, feeding behaviour, macronutrient selection

Identifiers

Local EPrints ID: 25672
URI: http://eprints.soton.ac.uk/id/eprint/25672
PURE UUID: 983fdfc3-4a24-4eb7-8d86-bb68931e2112

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Date deposited: 07 Apr 2006
Last modified: 15 Mar 2024 07:04

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Contributors

Author: A. M. Johnstone
Author: P. Faber
Author: E. R. Gibney
Author: M. Elia
Author: G. Horgan
Author: B. E. Golden
Author: R. J. Stubbs

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