Sheena Gawler has published the results on falls reduction in a low risk population of older adults after a 6 month PSI intervention and a 6 month OEP intervention.
Conclusions:
Community-dwelling older adults who joined an exercise intervention (FaME) aimed at increasing MVPA did not fall more during the intervention period, fell less and had fewer injurious falls in the 12 months after cessation of the intervention. However, 24 months after cessation of exercise, the beneficial effects of FaME on falls reduction ceased, except in those who maintained higher levels of MVPA. OEP exercise appears less effective at reducing falls in this functionally more able population of older adults.
You can download the paper to read Gawler et al_ProAct65 Falls_AGG_2016.