Park J, et al. - Researchers investigated older adults suffering from lower extremity osteoarthritis in an 8-week nonpharmacological pain intervention trial, to assess the baseline frailty level of the participants, to determine if more benefits of such intervention may be seen for baseline frailer older adults vs for their counterparts with less frailty and if the intervention could also modify frailty. In a random manner, they allocated the participants to either chair yoga (CY) or health education program (HEP) groups, and participants were asked to attend twice-weekly 45-minute CY or HEP sessions for 8 weeks. After a standard procedure, a frailty index (FI, 0–1) was developed by utilizing 82 variables. Higher Western Ontario and McMaster Universities (WOMAC) pain and pain interference were noted in relation to each 0.01 increase in baseline FI. Findings revealed that, in this patient population, the intervention effect of CY on pain was modified by frailty. This emphasizes that frailty evaluation is important to improve the management of pain in this population.