According to Cathe's initial information, "Shock Cardio HiiT – High Intensity Interval Training: This DVD contains three workouts between 20 and 25 minutes in length."
I'd love to see a modifier for low impact (but not low intensity). I can do a little high impact but have to start modifying pretty quickly so having someone to follow would be wonderful.
My Door Gym is different than what you describe. Mine just fits over the top and bottom of a door and then has the tubing with different levels of difficulty. It's by Altus. I bought mine at Wal-Mart many years ago and I don't think they have it anymore, but I found it on Amazon...
I have had problems with my elbows (mostly the left) for almost a year now and I think it started when I was doing bicep weight training with weights that were too heavy for me and did them too often (I was trying to push myself). Mine hurts on the inside of the elbow so it's called "Golfer's...