While walking, hiking or doing other cardiovascular exercise, you might focus on your breathing or heart rate to gauge how hard you’re working. That’s a perfectly good approach, but it won’t tell you ...

Sit on a chair, arms crossed, and count how many full stands you can do in 30 seconds, instructs Bains. “Double digits is a good baseline for most over 60s. Retest monthly and try to add one or two ...