The Scientific 7-Minute Workout from New York Times

Ask your therapist about this. I can't do jumping jacks, no arms above head, can't get my feet off the floor at the same time; no pushups, hand will not stay flat; no high knee running in place, can't get my knees high; triceps dip would fail.
http://well.blogs.nytimes.com/2013/05/09/the-scientific-7-minute-workout/

Explanations at the link.