1. Hypertrophy programming should revolve around three factors: volume (total work done), muscle damage and variety of movements
2. Lifting tempo is more critical for hypertrophy than any other phase. Be sure to prescribe lifting tempos and make sure you client sticks to them.
3. Ideal time under tension (total amount of time a set should take) for hypertrophy is 40 to 50 seconds. In fact, try a program where your client performs the movement for that amount of time instead of counting reps.