While regular push-ups with your legs straight [1] are challenging enough, if you really want to get stronger and build muscle in your upper back, arms, and core, this variation is a must do. Grab a pair of light- to medium-weight dumbbells, and add this push-up to your routine.

Dumbbell Push-Up With Renegade Row

• Begin balancing in plank position, shoulders stacked over the wrists, with a dumbbell on the floor in each hand.
• Bend the elbows behind you, and lower the torso into a push-up. Press back up to plank.
• Do a row [2] on the right side, then on the left.
• This counts as one rep.