Buy a heart monitor. Get a grandchild to find one on the internet for you if necessary. Don’t fight me on this one. It is vital that you work out at a level that is safe and appropriate for you. The best way to keep track of that is with a heart monitor. One glance at your heart rate will tell you if you need to back off or turn up your effort.
You want to be working out at 60-75% of your total capacity. This isn’t something you can check out while you are huffing and puffing on the stationary bike. The process goes something like this:
Before you can find your appropriate aerobic range you need to find your total capacity. To do that, subtract your age from 220. If I were 70, for example, that would be
220
-70
150 = my maximum capacity.
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