This exercises is designed to be performed with resistance tubes or bands. Resistance Tube exercises offer a portable solution for full body conditioning and full range-of-motion training.
Start in a forward lunge position with the right leg in front and place the middle of the tube under the right foot.
Grasp one handle with the right hand, resting the elbow on the inside of the knee to target the biceps more deeply. Make sure there is no slack on the portion of the tube between the foot and hand.
With the palm facing away from the knee, curl the tube up towards the shoulder, squeezing biceps at the top. Then, slowly lower back down.