Strength training, walking, and social activity improve sleep in nursing home and assisted living residents: randomized controlled trial.
Richards KC, Lambert C, Beck CK, Bliwise DL, Evans WJ, Kalra GK, Kleban MH, Lorenz R, Rose K, Gooneratne NS, Sullivan DH. Strength training, walking, and social activity improve sleep in nursing home and assisted living residents: randomized controlled trial. J Am Geriatr Soc. 2011 Feb; 59(2):214-23.