Hey LIz and Robin!
I know that you both will LOVE Turbo Jam!

Be sure to do "Learn and Burn" for awhile so that you really get the right form for each of the exercises, then you will get the most benefit from them. I go back to "Learn and Burn" every so often just to make sure that my form is good.
My oldest son is a Tae Kwon Do Black Belt, and he says that form is REALLY important to effective kicks and punches! By doing them powerfully and doing them CORRECTLY, you get AMAZING RESULTS! ( Chalene Johnson of Turbo Jam has background in Tae Kwon Do also.)
Don't worry if you can't kick as high as the people in the video! Stretch deeply and hold the stretches. Your flexibility WILL improve! I began yoga a couple years ago AT AGE 53! Trust me, flexibility CAN improve even at an older age! Yoga is a GREAT compliment to Turbo Jam!
Have water handy! You WILL sweat!
Cheryl