Effect of Exercise Combined with Natural Stimulation on Korean College Students' Concentration and Positive Psychological Capital: A Pilot Study.

This study aimed to investigate the effects of short-term exercise, within the natural environment or by applying similar visual stimulation, on concentration and positive psychological capital among Korean college students. Participants were 175 male college students—selected by non-probabilistic sampling—from the Korean National Police University in Asan-si, Republic of Korea, in March 2021. Participants were divided into three condition groups: the natural environmental exposure with outdoor exercise (n = 57), visual stimulation with indoor exercise (n = 58), and indoor exercise (control group; n = 60).