I wondered if I would be able to even minimally keep up with the class. I hadn't much of an idea of what I could actually do physically since my prior activity for many years was just walking. I was concerned that I would not have the stamina, or endurance to push myself physically in a way that was so much more demanding than my usual day to day life. I worried that my commitment to the program would break down and I would give up. Maybe the biggest question was not knowing how much to push myself - how was I to know what my body could actually take, without causing physical damage. TriForce has helped me a great deal with all the concerns that I had in the beginning. Since the coaches are continually suggesting and demonstrating alternative exercises for each set of exercises, it provided me with more of an idea of my own physical limits. This was great since some movements were beyond what I could do. And when those days come when one feels 'less than their best', there is no pressure to push it beyond what one is comfortable with at the time. As far as commitment is concerned, the atmosphere is so enjoyable and easy, (and it's both the coaches and the participants that make this what it is). When my Fitness day comes, I just get up and go. My first goal was to, at least, 'maintain' or not lose what muscle mass I had. The 2nd goal was to 'improve on muscle mass and improve my overall physical condition. The 3rd was to lose some weight, if possible. I believe that I have slowed down or stopped muscle loss to a degree . I haven't challenged any 'ironman' to an arm wrestle or anything, but my Doctor finds that I have improved arm strength and she says that my range in movement and stretch has improved and is better than hers. I also feel in better condition and - someone at Tai Chi said that he noticed that I was building muscle , so my TriForce program must be working! The weight loss, well, I would have to give up a few goodies that prevent me having that Christy Brinkley body and that hasn't happened yet.