Serious about packing on quality muscle size with this killer 15-minute body part workout? Get ready. This is a workout designed for individuals seeking maximal muscular development and leanness by trashing all the critical growth fibers in one insane 43-rep set on the same body part. It's called the 16-12-25 workout. Yikes!

Warning: This is not for anyone with less than one year of consistent weight training experience. Nor is it for anyone not prepared to enter the hurt box, because this workout demands a high level of discomfort, focus and motivation.

How Does The 6-12-25 Workout Program Work?

You will perform one big giant set which combines three different exercises for the same muscle group. A giant set is one set of three different exercises back-to-back-to-back without resting.

You'll do 6 reps with the first exercise for strength gains, then you'll do 12 reps with the second exercise for size gains and then you'll do a third exercise for 25 reps for endurance gains.