If im 5"2 and 150lbs is that going to matter? No........won't matter at all. You'll learn one-footed strokes at first....so you will easily be able to regulate your weight. When you learn two footed strokes, upper body strength will be important to regulate your weight. I weigh 155 and I've had no problems at all. With this modality.....communication is more important than ever. It is crucial that you establish some guidelines with your client and it is IMPERATIVE that they communicate with you throughout the massage.Lisa