Research article - (2016)15, 467 - 476
Effects of Different Intensities of Endurance Exercise in Morning and Evening on the Lipid Metabolism Response
Hyeon-Ki Kim1,2,, Karina Ando1, Hiroki Tabata1, Masayuki Konishi3, Masaki Takahashi4, Mio Nishimaki1, Mi Xiang1, Shizuo Sakamoto3
1Graduate School of Sport Sciences, Waseda University, Saitama, Japan
2Research Fellow of the Japan Society for the Promotion of Science, Tokyo, Japan
3Faculty of Sport Sciences, Waseda University, Saitama, Japan
4Faculty of Science and Engineering, Waseda University, Tokyo, Japan

Hyeon-Ki Kim
✉ Graduate School of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
Email: gusrl82@ruri.waseda.jp
Received: 21-12-2016 -- Accepted: 14-06-2016
Published (online): 05-08-2016
ABSTRACT

To study the effects of different exercise intensity performed at different exercise times on lipid metabolism response during prolonged exercise. Nine young men performed endurance exercise at different exercise intensities (60%VO2max or Fatmax) in the morning (9 am to 10 am) or evening (5 pm to 6 pm); blood samples were collected before exercise and immediately and one and two hours after exercise completion. Expired gas was analyzed from the start of exercise until two hours after exercise completion. There were no significant changes in catecholamine (adrenaline and noradrenaline) and free fatty acid levels between morning and evening trials for each endurance exercise intensity. However, the morning and evening trials both exhibited significantly higher lipid oxidation at Fatmax than that at 60%VO2max. These results suggest that exercise at Fatmax offers greater lipid oxidation than that at 60%VO2max, regardless of exercise timing.
Key words: Exercise timing, prolonged exercise, exercise intensity, Fatmax, lipid oxidation, catecholamines

Key Points
  • It is important to consider exercise intensity when evaluating lipid oxidation.
  • Few studies have investigated the effects of the intensity of exercise on lipid oxidation in the morning and evening.
  • Fatmax exhibited greater total lipid oxidation compared to that of 60%VO2max when energy expenditure was equated, but time of day did not affect lipid oxidation in prolonged exercise.








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Effects of Different Intensities of Endurance Exercise in Morning and Evening on the Lipid Metabolism Response
Hyeon-Ki Kim, Karina Ando, Hiroki Tabata, Masayuki Konishi, Masaki Takahashi, Mio Nishimaki, Mi Xiang, Shizuo Sakamoto
2016(15), 467 - 476.
DOI: https://doi.org/