Sit up tall with a flat back / engaged core & grab the bar with an underhand grip, pull your elbows back toward your hipbones pinching your shoulder blades together & squeezing your back muscles the whole time. Slowly return to starting position.

Weight Recommendations:
Beginner: 15-25lbs
Intermediate: 35-70lbs
Advanced: 75-100+lbs

*Modification: you can use a seated row machine or do bent over dumbbell rows