Appetite, energy intake, and PYY sub(3-36) responses to energy-matched continuous exercise and submaximal high-intensity exercise

• Published in: Applied physiology, nutrition, and metabolism Vol. 38; no. 9; pp. 947 - 952
• Main Authors: Deighton, Kevin, Karra, Efthimia, Batterham, Rachel Louise, Stensel, David John
• Format: Journal Article
• Language: English
• Published: 01.01.2013
• ISSN: 1715-5312; 1715-5320
• DOI: 10.1139/apnm-2012-0484

High-intensity intermittent exercise induces physiological adaptations similar to energy-matched continuous exercise, but the comparative appetite and energy balance responses are unknown. Twelve healthy males (mean plus or minus SD: age, 22 plus or minus 3 years; body mass index, 23.7 plus or minus 3.0 kg.m super(-2); maximum oxygen uptake, 52.4 plus or minus 7.1 mL.kg super(-1).min super(-1)) completed three 8 h trials (control, steady-state exercise (SSE), high-intensity intermittent exercise (HIIE)) separated by 1 week. Trials commenced upon completion of a standardized breakfast. Exercise was performed from hour 2 to hour 3. In SSE, 60 min of cycling at 59.5% plus or minus 1.6% of maximum oxygen uptake was performed. In HIIE, ten 4-min cycling intervals were completed at 85.8% plus or minus 4.0% of maximum oxygen uptake, with a 2-min rest between each interval. A standardized lunch and an ad libitum afternoon meal were provided at hours 3.75 and 7, respectively. Appetite ratings and peptide YY sub(3-36) concentrations were measured throughout each trial. Appetite was acutely suppressed during exercise, but more so during HIIE (p < 0.05). Peptide YY sub(3-36) concentrations increased significantly upon cessation of exercise in SSE (p = 0.002), but were highest in the hours after exercise in HIIE (p = 0.05). Exercise energy expenditure was not different between HIIE and SSE (p = 0.649), but perceived exertion was higher in HIIE (p < 0.0005). Ad libitum energy intake did not differ between trials (p = 0.833). Therefore, relative energy intake (energy intake minus the net energy expenditure of exercise) was lower in the SSE and HIIE trials than in the control trial (control, 4759 plus or minus 1268 kJ; SSE, 2362 plus or minus 1224 kJ; HIIE, 2523 plus or minus 1402 kJ; p < 0.0005). An acute bout of energy-matched continuous exercise and HIIE were equally effective at inducing an energy deficit without stimulating compensatory increases in appetite.Original Abstract: Un exercice intermittent de forte intensite suscite des adaptations physiologiques similaires a un exercice continu sollicitant la meme depense energetique, mais on ne sait rien sur les adaptations de l'appetit et de l'equilibre energetique. Douze hommes en bonne sante (moyenne plus or minus e-t : age, 22 plus or minus 3 ans, IMC, 23,7 plus or minus 3,0 kg.m super(-2), consommation maximale d'oxygene, 52,4 plus or minus 7,1 mL.kg super(-1).min super(-1)) participent a 3 essais d'une duree de 8 h chacun (controle, exercice en regime stable (SSE), exercice intermittent de forte intensite (HIIE)) et intercales chacun d'une semaine. Les essais commencent apres un petit dejeuner standard. Les seances d'exercice sont effectuees de la 2 super(e) heure a la 3 super(e) heure. Dans la condition SSE, les sujets effectuent 60 min de pedalage a une intensite sollicitant 59,5 plus or minus 1,6% du consommation maximale d'oxygene max. Dans la condition HIIE, les sujets effectuent 10 4 min de pedalage a une intensite sollicitant 85,8 plus or minus 4,0% du consommation maximale d'oxygene en s'accordant 2 min de repos entre chaque effort. On leur apporte un repas standard a la 3,75 heure et, en apres-midi a la 7 super(e) h, un repas ad libitum. Tout au long de l'essai, on evalue la sensation de faim et la concentration de peptide YY sub(3-36). L'exercice cause une suppression marquee de l'appetit mais davantage dans la condition HIIE (p < 0,05). La concentration du YY sub(3-36) augmente significativement des la cessation de l'effort dans la condition SSE (p = 0,002); elle est la plus elevee dans les heures suivant l'exercice dans la condition HIIE (p = 0,05). La depense d'energie a l'effort ne varie pas entre HIIE et SSE (p = 0,649), mais l'intensite de l'effort percue est plus elevee au cours de HIIE (p < 0,0005). L'apport d'energie ad libitum ne varie pas d'un essai a l'autre (p = 0,833). Par consequent, l'apport d'energie relatif (apport moins depense nette) est plus faible en SSE et en HIIE que dans la condition de controle (p < 0,0005; controle 4759 plus or minus 1268 kJ; SSE 2362 plus or minus 1224 kJ, HIIE 2523 plus or minus 1402 kJ). Une seule seance d'exercice continu ou par intervalle de forte intensite, mais sollicitant la meme depense d'energie est aussi efficace pour creer un deficit energetique sans favoriser une augmentation compensatoire de l'appetit. [Traduit par la Redaction]