We recently ordered a rowing machine which was delivered to our house yesterday. After putting it together ("easy-to-assemble"...yeah, right), I decided to give it a go. I used it for a half-hour and certainly felt like I got quite a bit of exercise afterwards. To any of those who own/use rowing machines, my questions are: 1) What areas of the body does the machine work? 2) Is it a worthwhile machine to continue exercise on? 3) What is a good workout schedule? (ie, with each use, do I try to go another mile, etc.) I should note that I'm trying to improve my upper body here(arms specifically)...and maybe shave a half-inch off my stomach and sides. I also have a home gym as well as some dusty freeweights. To improve the areas I specified, what would you suggest? Do a little of each three, or put emphasis on a certain one? Any help would be greatly appreciated.