Mark of Fitness Exercise Monitor

While not as exciting as a homemade Spiderman web-shooter it so fetchingly resembles, the MF-180 allows you to monitor your workout intensity without the chest strap. It displays several readings and, most exciting, has an out-of-zone alert, which lets you know you're exercising too hard. I have been waiting for a device that undoes the years of programming from coaches yelling at me that I'm a lazy-ass.

By: anh ta