I was chatting with a friend on facebook earlier today, and she mentioned that she had some issues with her back, and was doing a low impact workout in the evenings. This is awesome news for her, the workout that is and not the back problems. I did want to mention this since it is a concern about many programs. I am currently working with the P90X program and the "X" is said to stand for Extreme. Trust me it can be very extreme. To me the extreme is more about attitude than pushing yourself past your limits. I have reviewed several other Beachbody programs and have found that almost all of them (at least the intense ones) have a low impact option. This is true with P90X as well as TurboFire (a High Intensity Cardio Program). The one that I have not seen any low impact modifications for is INSANITY. It is very intense and high impact. On all programs there is the legal caution concerning health issues, and there are safety tips throughout. The key is to always work up to the level you want to be. If you have a bad back or bad knees don't jump right into the high impact version. Follow the modified routine until your muscles get stronger. We all have limitations. The key is do they control you, or do you control them.
With that said, be active, be safe and Bring It. One reminder that Tony Horton always gives is for everyone to "Do your best, and forget the rest." You are out to meet your goals, not mine, or Tony's or anyone else's.