Ankle Sprains and Aging Pains

My father recently took it upon himself to buy a shiny new jump rope because he read online that aerobic exercise is great for your heart and what better way to get the heart pumping then by rope jumping? However, keep in mind he has never jumped rope before in his life. And is 67. And was wearing sandals. And was on uneven concrete. And did I mention he was going on an overseas vacation in a week? So, of course, his first attempted double-under criss-cross turned into a trip, fall, sprain ankle move.