One piece of advice I didn't see for those who used to exercise, stopped and then resume when over 50.

I worked out regularly through my 30s, then gained weight and let exercise routine go during my 40s, when I returned to grad school.

I started up again at 50, and loved it - felt more energetic, all the things talked about in t his article.

The one thing it's important to keep in mind (I noticed it around the time I turned 60, 10 years ago; it might be earlier or later for you, just be aware)

It takes a LOT longer to recover from injuries. This is particularly important to notice if you have been active and athletic most of your life. At 60, having improved my diet and workout routine dramatically beyond even what it was 30 years prior, I felt better than I felt in my 20s.

The problem was, my 60 year old body couldn't handle the same exercise intensity as it did in my 20s. So you have to be careful you don't overdo it, and you may not be aware of it, so be extra cautious. Because the same pulled muscle that might have gotten better in a month might take you 6 months to recover.

but PLEASE don't let that stop you from exercising. Now that I'm almost 70, I notice if I miss just a day or two of working out, my energy is definitely less, and overall mood is not as positive.

Finally remember: "The best exercise is the one you'll actually DO!"