Effects of mild calorie restriction and high-intensity interval walking in middle-aged and older overweight Japanese.
We investigated whether a combination of mild calorie restriction (MCR) and high-intensity interval walking (HIW) improved physical fitness more than HIW alone in middle-aged and older overweight Japanese (40-69years old, BMI23.6kg/m(2)). Forty-seven women and 16 men were divided into MCR+HIW and HIW groups. All subjects performed HIW: 5 sets of 3-min low-intensity walking (40% peak aerobic capacity for walking, VO(2peak)) and 3-min high-intensity walking (70% VO(2peak)) per day, 4days per week, for 16weeks while energy expenditure was monitored with a tri-axial accelerometer. The MCR+HIW group consumed meal replacement formula (240kcal): a mixture of low-carbohydrates and -fat and high-protein, for either lunch or dinner everyday and therefore, had approximately 87% of the energy intake of the HIW group during the intervention period. Although the HIW group showed improvements in BMI, blood pressure, and several blood chemicals, the MCR+HIW group had greater improvement. Moreover, the medical expenditure for the 6months including the intervention period was 59% lower in the MCR+HIW group than in the HIW group. Our strategy of a short-term combination of MCR and HIW may thus prevent lifestyle-associated diseases and improve health in middle-aged and older overweight Japanese.
Sawashita
Jinko
J
Departments of Aging Biology, Institute on Aging and Adaptation, Shinshu University Graduate School of Medicine, Matsumoto, Japan. jinkos@shinshu-u.ac.jp
Onitsuka
Sayaka
S
Gen-no
Hirokazu
H
Ishikawa
Shinobu
S
Iino
Fumie
F
Tateishi
Norihiko
N
Murakami
Takeo
T
Seki
Yoichi
Y
Nagaiwa
Toshiyuki
T
Hanaoka
Masaaki
M
Hama
Sumio
S
Nose
Hiroshi
H
Higuchi
Keiichi
K
D000328:Adult; D000368:Aged; D044466:Asian People; D001794:Blood Pressure / Q000502:physiology*; D015992:Body Mass Index; D031204:Caloric Restriction; D002149:Energy Intake / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D050177:Overweight / Q000150:complications / Q000503:physiopathology*; D010809:Physical Fitness / Q000502:physiology*; D016138:Walking / Q000502:physiology*