Exercise is for life.
Engaging in any form of physical activity is far preferable to doing nothing at all. I've been very fortunate over the years in remaining relatively injury free & more than anything else have been particularly blessed by having good joints - especially the knees.
That's probably mostly attributable to nothing more than genetics, but I think that daily doses of glucosamine for the past few years have kept my cartilage relatively healthy, and the supplement also appears to have definitely improved the flexibility of my spine.
As a long time ultra runner, I was fortunate to have ten wonderful years of competitive racing in the decade of the 80's. Currently I'm happy just being able to have a daily fitness run with the dog up Vail mountain before breakfast. If a reader has an interest in keeping track of their walking or running mileage, I've attached an Excel file of the type of running log I've used for over 20 years. Users are welcome to download it and use it for this same purpose. Click here to save or open.
Since I still teach skiing in the winter months, like most of us in that business, I use a series of strength and balance exercises to try to maintain a reasonably high level of fitness. In the past I used to vary the workout routine based on the season of the year, but currently it seems to make more sense to do the same program at least five days a week if possible all year around.
After giving up health clubs a few year's back, all my workout routine is done at home with very few mechanical aids. Basically I try to get this complete workout done prior to breakfast each morning.
Here's a description of the routine:
The above routine is not as time consuming as might appear on first examination. The whole series of exercises should require no more than 40-60 minutes to complete.
At the conclusion of the upper body strength work the dog & I head up the mountain for runs varying between 5-20 miles depending time constraints and weather/road surface conditions.
Then we come home and have breakfast.
The skiing balance development device I've been using is a high angle wobble board that seems to be very helpful in strengthening ankles and other lower leg muscles, tendons, etc. It's ideal to work out on when watching TV.