If I know I will not be able to follow this program exactly, would it still benefit me to purchase it. I only work out on average every other day and am in no way close to being in the shape the people in the video are. I am trying to save my muscle since I am close to 50. I probably don't even have all the equipment I need for STS. Will this be a waste of my money. I have all of her other strength training DVDs.