title: Effects of intermittent physical activity on fat utilization over a whole day.
abstract: OBJECTIVE
  We examined whether continuous and intermittent physical activity (PA) differentially influence fat utilization.
  
  
  METHODS
  This was a randomized crossover study. Nine healthy young male participants performed two 39-h (two nights, three days) PA sessions (continuous and intermittent exercise) in a respiratory chamber to measure energy expenditure (EE) and substrate oxidation. Participants used a stationary cycling ergometer continuously for 40 min and then 45 min in the continuous PA trial and for 5 min every 30 min 17 times in the intermittent PA trial. They consumed high-carbohydrate meals corresponding to predicted daily total EE for 3 d before entering the respiratory chamber and four high-fat meals corresponding to predicted total EE in the chamber.
  
  
  RESULTS
  Twenty-three-hour RER adjusted for sleeping RER on the preceding day was significantly lower in the intermittent PA trial than that in the continuous PA trial (P = 0.021). Twenty-three-hour RER adjusted for sleeping RER on the preceding day was correlated with accumulated consecutive minutes of METs ≤ 1.5 (3 min or more, r = 0.477; 5 min or more, r = 0.510; 10 min or more, r = 0.605).
  
  
  CONCLUSIONS
  The intermittent PA trial induced greater fat utilization than the continuous PA trial. The present study, therefore, suggests that intermittent PA has a beneficial effect on 24-h fat oxidation after consumption of a high-fat meal, which may help prevent weight gain over time.
authors: Graduate School of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan.
authors: Takafumi
authors: T
authors: Ando
authors: Chiyoko
authors: C
authors: Usui
authors: Kazunori
authors: K
authors: Ohkawara
authors: Rieko
authors: R
authors: Miyake
authors: Masashi
authors: M
authors: Miyashita
authors: Jonghoon
authors: J
authors: Park
authors: Osamu
authors: O
authors: Ezaki
authors: Mitsuru
authors: M
authors: Higuchi
authors: Shigeho
authors: S
authors: Tanaka
mesh_terms: D061725:Accelerometry; D000328:Adult; D015415:Biomarkers / Q000097:blood; D002153:Calorimetry, Indirect; D018592:Cross-Over Studies; D004040:Dietary Carbohydrates / Q000378:metabolism; D004041:Dietary Fats / Q000378:metabolism*; D004734:Energy Metabolism; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D016014:Linear Models; D008297:Male; D062407:Meals; D010101:Oxygen Consumption; D013997:Time Factors
chemical_list: D015415:Biomarkers; D004040:Dietary Carbohydrates; D004041:Dietary Fats