The Insanity workout is an advanced exercise program. It involves bodyweight exercises and high-intensity interval training. Insanity workouts are performed 20 to 60 minutes at a time, 6 days a week ...

Insanity came by airmail, bound like a prized first edition. The first time I tried it, it didn't seem too bad. A little sore in the thighs maybe, a little weak in the hip flexors, but nothing ...