Increase the intensity.

i was a little skeptical buying this, but the workout I'm doing requires this for about 40% of the workout. so i bought it. the power cable is lined with 3 cables; each with 40 pounds of resistance(more or less depending on the set you buy) that you can easily attach/detach for the desired tension. i usually do 3 sets of 20 reps with each workout. you will definitely feel the burn. also you can buy extra cables if your workout becomes to easy, to increase the intensity of your workout. i highly recommend this product. - Timothy B. Anderson Jr.