תזונה ותוספים The Influence of Brisk Walking On Appetite, Energy Intake and Plasma Acylated Ghrelin

[Mike Bikov]

Med Sci Sports Exerc. 2009 Nov 23. [Epub ahead of print]
The Influence of Brisk Walking On Appetite, Energy Intake and Plasma Acylated Ghrelin.

King JA, Wasse LK, Broom DR, Stensel DJ.

1Loughborough University, UK 2Sheffield Hallam University, UK.

PURPOSE:: This study examined the effect of an acute bout of brisk walking on appetite, energy intake and the appetite stimulating hormone - acylated ghrelin. METHODS:: Fourteen healthy young males (age 21.9 +/- 0.5 years, BMI 23.4 +/- 0.5 kg.m, VO2 max 55.9 +/- 0.7 mL.kg.min) completed two eight hour trials (brisk walking and control) in a randomizedcounterbalanced fashion. The brisk walking trial commenced with 60 minutes of subjectively paced brisk walking on a level motorised treadmill after which participants rested for seven hours. Participants rested for the duration of the control trial. Ad Libitum buffet meals were offered twice during main trials (1.5-2 and 5-5.5 h). Appetite (hunger, fullness, satisfaction and prospective food consumption) was assessed at 30 minute intervals throughout. Acylated ghrelin, glucose, insulin and triacylglycerol were determined from plasma. RESULTS:: Sixty minutes of brisk walking (7.0 +/- 0.1 km.hr) yielded a net (exercise minus resting) energy expenditure of 2008 +/- 134 kJ yet did not significantly influence appetite, energy/macronutrient intake or the plasma concentration of acylated ghrelin, either during or after exercise (P > 0.05). Participants did not compensate for energy expended during walking therefore a deficit in energy was induced (1836 kJ, 439 kcal) relative to control. CONCLUSION:: This study demonstrates that despite inducing a moderate energy deficit, an acute bout of subjectively paced brisk walking does not elicit compensatory responses in acylated ghrelin, appetite or energy intake. This finding lends support for a role of brisk walking in weight management.​

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