Is 70 the age to stop towing

I am almost 71, and run with many folks about the same age. Most of our buddies are fit, run, bike, swim, and work out----so why shouldn't we head out and have fun? We have our own weight set and gym here at the house to stay in shape.
Some people use the term "elderly" or words demeaning seniors when that doesn't hold up any longer. 70 is the new 50! Let's git out there.