Most people use the same repetition speeds for all their workouts. Try something different the next time you are working out and speed up your repetitions. By using faster lifting speeds, you can actually target and work out diverse muscle fibres, some, which may not get stimulated as often.
Utilize the rest-pause method in your workouts. This method claims that your muscles usually gain up to 90% of its strength back in just a matter of 10 to 20 seconds. In order to do it effectively, pick a heavy weight that can cause you to go to failure at a particular rep, such as eight to ten reps, and then stop after short couple reps. Rest for around 10 to 20 seconds, and then resume your reps.