@article{201120070279, title={The Effects of a Group-based Walking Program on Daily Physical Activity in Middle-aged and Older Adults}, author={Noriko Takeda and Koichiro Oka and Kensuke Sakai and Masaya Itakura and Yoshio Nakamura}, journal={International Journal of Sport and Health Science}, volume={9}, number={ }, pages={39-48}, year={2011}, doi={10.5432/ijshs.20070279} }