For me, the following worked — but you should consult with your medical team before undertaking new exercise activities….

Goals:  in my case, I needed about 3 hours of aerobic exercise per day. That’s higher than some, but as I mentioned, it appears that my cancer cells didn’t like all my exercise, so I will continue to disappoint “my little friends”. Therefore, I swim about 1-1/3 hours every day and also 2 hours on the treadmill or hiking. That allows me to keep my heart in the aerobics range for the time that I need.

Interestingly, I found that my swimming became more efficient using TI swimming, so that my speed increased, my distance/hour also increased, but my heart rate dropped as my heart / cardiovascular system became stronger. When I started [back in 2017], my resting pulse was 75; now it’s 45. So — my target pulse for exercise has also dropped [guidance from my cardiologist]. Initially my cardio target was 163. Now, it’s in the upper 130’s.

My goal: HOW HARD [exercise output] for HOW LONG [duration] ….
rather than how far/ how fast ….

Equipment

• I’ve been using an Apple watch for all my exercise monitoring. It’s been a great tool: keeps track of my meds, hydration, sleep, exercise, has a phone, provides entertainment when running/walking outdoors, maps for routing, weather for safety. Once I established the time desired for my workout, I swim at a rate measured in MIN:SEC per 100 yds that is consistent — and provides my heart rate will be in my target zone.