Complexity of Daily Physical Activity Is More Sensitive Than Conventional Metrics to Assess Functional Change in Younger Older Adults. - Wei Zhang 091; Michael Schwenk; Sabato Mellone; Anisoara Paraschiv-Ionescu; Beatrix Vereijken; Mirjam Pijnappels; A. Stefanie Mikolaizak; Elisabeth Boulton; Nini H. Jonkman; Andrea B. Maier; Jochen Klenk; Jorunn L. Helbostad; et al. (Sensors, 2018)