If you are a regular walker, are a member of the YMCA or CrossFit – don’t change it! This study doesn’t require you to change the way you exercise unless you want to. There are lots of options for any age in the book in case you don’t have a plan. Maybe you want to just walk or stretch – that’s in there. If you train for marathons and adventure racing – don’t worry, there are even programs in there for you too.