I'm a little concerned about the amount of time my workout sessions last. Most days my workouts don't last much longer than 30 minutes. If the weight room isn't too crowded I can be done faster than that. I don't rush, but I keep a steady pace. I don't rest much between sets, and I work out alone. I'm currently doing WBB Routine 1 except I substituted Leg Press for Hack Squats because Hacks hurt my knee. Should my sessions be lasting longer? Should I add sets/reps/exercises?