Fitness trainer and expert, Marzia Prince, uses a suspension training system to do TRX crunches. These will have your abs humming in minutes. You can also use TRX suspension training to work your upper body, lower body, core, and even do cardio.
Fitness trainer and expert, Marzia Prince, uses a suspension training system to do TRX crunches. These will have your abs humming in minutes. You can also use TRX suspension training to work your upper body, lower body, core, and even do cardio.
