I buy these to start the p90x program . not be very athletic , I think the 3-24 pound weight would be enough . they be solid and well design . change weight be a snap . although they be fine start out , I realize that I would quickly outgrow these weight as I progress through the workout series . 24 pound seem like a lot of weight if you have not be lifit before but after a few week you will wish you have more resistance on some exercise . I return these and get the Powerblock Sport 5.0 that cover 5-50 pound instead . they be both great product , vastly superior to the rubber band for p90x -lrb- which be ok as a last resort , but free weight be much more challenging and provide a better workout -rrb- . if you plan on do less weight and more rep , then the 3-24 pound set may be appropriate .