What you do is not that important. It is important to do something at least once a week. Any endurance sport is fine. Cycling, swimming, running, rowing or cano

What you do is not that important. It is important to do something at least once a week. Any endurance sport is fine. Cycling, swimming, running, rowing or canoeing are good options. But depending on where you live, you need a plan for wintertimes / rainy seasons. Some things to consider: * doing things in a group / with a partner helps to train consistently * your body gets older. Look for something that you can do for the rest of your life. * find something that you like and stick to it * do something that does not stress your joints too much For me, cycling (on my own) and rowing (in a club) work very well. Gyms - not so much. We have active rowers that are older than 80 years. Not sure if there are many cyclists in that age.