I'm using the arm bands in the pool. $ laps crawl, 2 laps elementary back, 2 laps side stroke, 2 laps breast stroke and 4 laps crawl. Then I take them off and finish my mile workout. Arms are less tired at the end of the session. The leg bands I use on the treadmill. 20 minutes, the first two times I couldn't continue more than 5 minutes, but today, I was able to do 10 minutes more. I used to do 40 minutes. I haven't seen any information on using in the pool so anything you can send my way ...