Is there a free heart rate monitor for iPhone 5 that will notify me if I exceed a specific heart rate?
I'm not usually able to look at my phone when I'm working out so I was wondering if there is a heart rate monitor, or heart rate monitor and app combination, that will let me know if I exceed a heart ...
I just started the beginner workout program of You Are Your Own Gym. The first two weeks are described as "low intensity" aimed at "muscular endurance" using "ladders". Is it meaningful to worry ...