Meet the Tension Toner: another handy tool that lets you do more with resistance bands. The Tension Toner comes with 3 levels of resistance built in. It can be folded for travel too. The Tension Toner makes you pull against resistance every time to work your muscles harder.
The device works your muscles in 2 directions to kick your butt. Like what you see? You can get one of these for under $80.