Performing repetitions until you can no longer lift the weight through the positive part of the movement is called?

Training to Failure

Explanation:

In weight training, when one keeps repeating a particular exercise such as the bench press to an extent that muscles momentarily fails, this process is known as training to failure. At this point, it is no longer possible for the neuromuscular system to produce the force required to overcome that same workload anymore.

Repetition Maximum.

Explanation:

This is a type of exercise  designed to determine the heaviest weight an individual  athlete can lift  when maximum effort is applied   during  a fixed   exercise.It is  used to measure the  isotonic muscle strength of the athlete undergoing  training.  Isotonic muscle tone is  the extent of  contraction of the muscles against the external resistance during weight lifting.

Safety Guides

→The  Athletes should undergo  some  warm up exercises to warm up the muscles  prior   his  first RM starts. This is essential because lifting of heavy weight exposed  muscles  to injuries.Thus a  warm up muscle is less prone to injuries.

→Furthermore,a 24-hrs rest should be observed. prior to the commencement of the  1-RM  for the muscles to rest.

→The support of a spotter is needed in case of any accident that may occur from the heavy wait.

The first repetition maximum is the maximum weight  that can be lifted by an individual  with maximum effort in a single repetitive exercise

i'm pretty sure questions like these aren't allowd.   but, sure.   i can and talk : ))