I cringe when I see P/P/L routine suggested as only a M/W/F split hitting each muscle only once a week. ALL he will be doing is lowering his current overall volume for each muscle. He currently hits chest once a week and prob 4 exercises, now he'll only be doing 2. Sure he MAY gain alil strength due to decrease in volume, but it's only once a week so won't be much. If you lower volume YOU NEED TO INCREASE FREQUENCY. Low volume/frequent workouts allow you to gain strength EVERY SINGLE WORKOUT. The P/P/L is kinda volume but not really, may gain some strength, it won't be able to increase weight every workout, and if u do it's not much and not frequent. It is FAR FROM OPTIMAL. sure people use it but it's not exactly a good choice. Only training M/W/F makes it difficult to create an optimal routine, but if u want a cookie cutter DC is the way to go, or a workout wijth a similar philosophy.