2 Minute of Sit-Ups: Week of September 21, 2014 September 21, 2014/0 Comments/in Blog, Fitness, Weekly Workout Challenge /by Dr. Austin Cohen Workout Details Date: September 21, 2014 Workout: 2 minutes of sit-ups Standards You can use an abmat. Feet must stay on ground. Hands must touch behind head when coming back. Hands must touch toes when coming forward. #2minchallenge on Instagram or Facebook to challenge your friends.