Jason Poston's Timed Shoulder Shaper

At first glance, this workout looks pretty mellow: Seven exercises with a 2.5-minute rest period between each one. Piece of cake! But then you start the first set, and that cold feeling starts to creep up your spine. "What have I gotten myself into?"

If you're looking for a workout that will force shoulder growth, IFBB pro Jason Poston has created just the thing. There are a modest number of exercises—nothing crazy—and you do get a lot of rest in between them, but the way he structures the sets will have you begging for mercy.

Poston kicks off the workout with timed sets of 3 minutes, then 90 seconds, then 60 seconds, and finishes up with some standard sets and reps—but with a twist. As you battle through these exercises, pay attention to form, but feel free to cheat just the tiniest bit to get in all the reps you can.

Once you finish your first time through this workout, you might agree with Poston that this isn't something you want to do every week. He suggests that you...

Source: Jason Poston's Timed Shoulder Shaper