“…Possible explanations for the negative results are the small nonrandomized designs [26], or insufficient intensity, frequency (e.g., 15 min per day/6 days per week) [30], or duration of interventions (majority < 6 months) [26,27]. With regard to the second method, exercise training, multiple studies report benefits on physical performance [32][33][34][35][36][37], cognitive functions [12,[38][39][40][41][42][43][44], mood, and behavioral problems [1,2,9,32] in elderly subjects with dementia. Nonetheless, other studies report no benefits of exercise on these outcomes [21,34,35,[43][44][45][46][47][48][49].…”