The second half of the program is all about maximizing size with slightly higher reps and an emphasis on intensity. Rep ranges move up to 10-12 for most exercises, which is ideal for promoting muscle hypertrophy (growth). Overall volume increases slightly during these two weeks, mainly due to the addition of isolation exercises that you’ll perform before compound movements for your chest, back, shoulders and legs. Called pre-exhaustion, this technique dramatically increases workout intensity. You fatigue the main target muscle with an isolation exercise, then hit it in this fatigued state with a compound move, which if done right will lead to your main muscle failing before assistance muscles give out. (For example, for chest the dumbbell flye hits the pecs directly, so your triceps shouldn’t end up being the weak link and cause the termination of the set during the bench press).
Plasma and muscle glutamine levels are decreased post workout and it can take hours before they are restored (Rowbottom, 1996). A study examining the effect of free-form glutamine and glutamine peptide ingestion on muscle glycogen resynthesis found that plasma glutamine was decreased by 20% post workout with the ingestion of glucose only (control), showed no change with ingestion of whey protein or wheat protein hydrolysate plus glucose drinks, and a 200% increase with ingestion of free-form glutamine plus glucose drink (VanHall, 2000). Free-form glutamine supplementation was needed to elevate plasma glutamine levels post workout.