Monitor your heart rate on your chest, arm or wrist. Three times the motivation and three times the fun, with a light indicator and built-in memory so you can see your zone without a phone, and up to six months battery life on one charge.
If you have fun while you workout, is it really working out? I like to think of it as having a great time while making my body stronger, leaner and fitter and my headspace MUCH happier! Try it with me and you'll see!