Has anyone tried this? It's a basic HIIT workout, requiring nothing but body-weight, a chair and a wall.

You to 30 seconds of exercise, with 10 seconds of rest in-between. The order of exercise is:

Jumping jacks
Wall sit
Push-up
Abdominal crunch
Step-up onto chair
Squat
Triceps dip on chair
Plank
High knees/running in place
Lunge
Push-up and rotation
Side plank

My wife and I have been doing these for about a week and a half now. I JUST got up to 3 reps of this circuit. She's up to two now. Maybe I'm old and out of shape, but I had no idea how hard this shit would be when I started, but less than two weeks in, I'm already seeing results.

I think I'm going to just do this, basketball and running, and cut out all weight training for the foreseeable future, unless, of course, this becomes too easy.