Effects of a 12-week, short-interval, intermittent, low-intensity, slow-jogging program on skeletal muscle, fat infiltration, and fitness in older adults: Randomized controlled trial - Ikenaga, M; Yamada, Y; Kose, Y; Morimura, K; Higaki, Y; Kiyonaga, A; Tanaka, H (Eur J Appl Physiol, 2017)