Naofumi Yamamoto
Ehime University
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Publication
Featured researches published by Naofumi Yamamoto.
Journal of Physical Activity and Health | 2015
Naofumi Yamamoto; Mieko Shimada; Naoki Nakagawa; Susumu S. Sawada; Mamoru Nishimuta; Yasuo Kimura; Masaharu Ohashi; Hidenori Asai; Hideo Miyazaki; I-Min Lee; Steven N. Blair; Yutaka Yoshitake
BACKGROUND Tracking refers to the tendency for an individual to maintain their rank within a group over time. This study longitudinally investigated the 8-year tracking of pedometer-determined physical activity among physically independent elderly Japanese people aged 72 to 80 years. METHODS Steps/day were measured when participants were aged 72 and assessed again after 2, 5, and 8 years. The number of participants with a 2-year follow-up (72 to 74 years) was 177 (101 males, 76 females), with a 5-year follow-up (72 to 77 years) was 183 people (110 males, 73 females), and with an 8-year follow-up (72 to 80 years) was 145 people (91 males, 54 females). Step counts were continuously measured for 1 week in January, April, July, and October during each year of assessment. RESULTS A high rank correlation coefficient for steps/day exceeding 0.60 was obtained at the 2-, 5- and 8-year follow-up examinations for both males and females. CONCLUSION This study suggests that the rank within a group of pedometer-determined steps/day remains stable over up to 8 years in healthy Japanese people aged between 72 to 80 years old.
Japanese Journal of Physical Fitness and Sports Medicine | 2007
Naofumi Yamamoto; Yumiko Hagi; Yutaka Yoshitake
The Journal of Physical Fitness and Sports Medicine | 2018
Naofumi Yamamoto; Susumu S. Sawada; I-Min Lee; Yuko Gando; Ryoko Kawakami; Haruka Murakami; Motohiko Miyachi; Yutaka Yoshitake; Hidenori Asai; Takashi Okamoto; Koji Tsukamoto; Steven N. Blair
Medicine and Science in Sports and Exercise | 2018
Mieko Shimada; Scott B. Going; Nobuko Hongu; Naofumi Yamamoto; Yasuo Kimura; Naoki Nakagawa; Yutaka Yoshitake; Hideo Miyazaki
Medicine and Science in Sports and Exercise | 2018
Minoru Kunii; Susumu S. Sawada; Naofumi Yamamoto; Yuko Gando; Hisashi Naito
BMC Public Health | 2018
Naofumi Yamamoto; Hideo Miyazaki; Mieko Shimada; Naoki Nakagawa; Susumu S. Sawada; Mamoru Nishimuta; Yasuo Kimura; Ryoko Kawakami; Hiroshi Nagayama; Hidenori Asai; I-Min Lee; Steven N. Blair; Yutaka Yoshitake
Medicine and Science in Sports and Exercise | 2017
Naofumi Yamamoto; Hideo Miyazaki; Hiroshi Nagayama; Mieko Shimada; Naoki Nakagawa; Susumu S. Sawada; Mamoru Nishimuta; Yasuo Kimura; Ryoko Kawakami; Hidenori Asai; I-Min Lee; Steven N. Blair; Yutaka Yoshitake
Medicine and Science in Sports and Exercise | 2015
Naofumi Yamamoto; Hiroshi Nagayama; Mieko Shimada; Naoki Nakagawa; Suumu S Sawada; Mamoru Nishimuta; Yasuo Kimura; Takahide Matsumoto; Hidenori Asai; Hideo Miyazaki; Yutaka Yoshitake
Medicine and Science in Sports and Exercise | 2014
Naofumi Yamamoto; Hiroshi Nagayama; Mieko Shimada; Naoki Nakagawa; Susumu S. Sawada; Mamoru Nishimuta; Yasuo Kimura; Hidenori Asai; Hideo Miyazaki; Yutaka Yoshitake
Medicine and Science in Sports and Exercise | 2014
Naofumi Yamamoto; Hiroshi Nagayama; Mieko Shimada; Naoki Nakagawa; Susumu S. Sawada; Mamoru Nishimuta; Yasuo Kimura; Hidenori Asai; Hideo Miyazaki; Yutaka Yoshitake