Training past your Fatigue Threshold.

Forced Reps: a method of weight-training in which a trainer helps you to continue training beyond the normal limit of fatigue. When you have completed the number of repetitions that causes fatigue, the trainer physically assists you in performing more repetitions (usually 3–5 more).

Forced reps are used to get you past the Fatigue Threshold on the eccentric portion of the exercise, break through training plateaus, and creates more intensity in your workout.

Tips for reaching your Fatigue Threshold:
1. Be prepared to follow your trainers instructions especially at the very end of your set when it gets difficult.
2. Properly fuel your body with the appropriate nutrients before your workout.
3. Drink plenty of water! (half your body weight in ounces).
4. Be consistent in your workout routine and continue to push past mental fatigue.

Momentary Muscular Failure: the point where the neuromuscular system can no longer produce adequate force to overcome a specific workload.

Read more about reaching your maximum effort, here.