Tip: Keep your back straight throughout the exercise to avoid injuries. 4. TRX-Assisted Squats The TRX helps you perform squats with less impact on your knees: How to do it: Grab the TRX handles ...
or even TRX strap (if you feel daring), which turns it into a glute and quad powerhouse. Bulgarian split squats deliver results along with the soreness. They're great for improving your balance ...