I have been working out fairly regularly for years (more than 10) Also I just turned 50 if that helps. I do cardio and weight training mostly and am a member of a gym and workout average 3 times a week in the gym and do a lot of walking elsewhere. Other people working out, as well as trainers, have helped me develop different programs over the years and overall I am pleased with what I am doing and the results. However, I have this running argument with a friend and my husband because they say since I don't sweat really good while working out, it is not doing me any good. I think some people just sweat more easily than others and I also find that weight lifting does not necessarily cause you to sweat as much as cardio does as a general rule. What do others think about this issue? Is it necessary to sweat tons in order to gain benefit from exercising? I would love to hear what others think about this topic. P