300 Workout Challenge Instructions: br br 10 exercises, 10 repetitions. Rest for 30 seconds to 1 minute. Repeat for a total of 3 rounds for 300 repetition challenge. br br 1. Bulgarian Squats br 2. Close Grip Pushups br 3. Forward Lunges br 4. Recline Rows (Overhand rows) br 5. Decline Pushups br 6. Vertical Jumps br 7. Chin Ups br 8. Mountain Climbers br 9. Prisoner Squat br 10.