Intensity is written in terms of repetition maximum (RM), which is the maximum number of repetitions required to reach a point of momentary fatigue with a specific weight. 10RM means that you should use a weight challenging enough to cause momentary fatigue by the 10th rep. If you can do more than 10 reps, add weight. It is more desirable to reach fatigue in fewer reps. If you are exercising at home with only one or two sets of weights, either perform reps until you reach fatigue or perform as many reps as possible in 30 to 45 seconds.Learn more and purchase here.