To develop resistance with a weight-free row, all you need is your very own clenched fist. Generally done with a pinhead, making a tight clenched fist activates the muscle mass of your arm enough to make for a considerable workout.
To do it, bend slightly onward by hinging at the hip. Bend your joints at your sides, as well as draw your arms back without unbending at the elbow joint, producing a rowing motion. This functions biceps as well as triceps muscles in addition to triggering the muscles of your upper back. Repeat for a full minute.
Make certain to maintain your arms near to your sides to optimize the efficiency of this workout.