By using the method of literature review, this paper introduces the popular theoretical models which have shown to better explain physical activity behaviors at a certain degree, summarizes the dominating theoretical models in the studies of physical activity behaviors of the elderly in China. In addition, shortcomings and future prospects are pointed out at the end.

A poly(pyridine–pyrrole) foldamer binding isolated water molecules were designed, synthesized and characterized.

C14H39Cl3N6O13Zn2, monoclinic, P121/m1 (No. 11), a = 7.802(2) Å, b = 12.121(3) Å, c = 15.662(3)Å, β = 104.29(2)°, V = 1435.3 Å3, Z=2, Rgt(F) = 0.055, wRref(F2) = 0.152, T = 293 K.