Control Your Breathing.
When you perform an ab exercise such as the crunch, exhale when you reach the finish or top position. This is important because it helps you better contract your abs. Holding the position for a second or two will maximize muscle-fiber involvement. (This video is showing in fast motion so we can fit everything in 15 seconds)
1 Up Nutrition Athlete Jonas incorporates #1upnutrition Products into his workouts and daily routine to maximize his Gainz!!