Yes, at 83 I do a regular series of strength training using a variety of resistance items. I put together my own set that I do every two to three days. This includes dips on a dip bar, some weights, heavy bands, push-ups, 1.5 to 3 minute planks, unweighted squats, etc. I lost my Pull-Ups due to a shoulder injury 3 years ago but I'm slowly working on getting them back. I also do 20 minutes of daily stretching, primarily of my lower body and back, due to having a cantankerous back. Add in swimming 40 minutes four times a week, indoor trainer 30 minutes daily, and walking.