Pre-exhaust

Pre-exhaust training is essentially isolating a certain muscle before doing a compound exercise straight after, for example with shoulders you could do a set of 15 reps lateral (side) raise which is isolation and then straight into a shoulder press exercise which is a compound movement, with chest you could do fly's and the bench press, legs you could could do leg curl then squat or hamstring curl then straight leg deadlifts...

As compound movements use other muscles you may not always reach muscle failure so using pre exhaustion is a really good method to break boundaries and progress.

Try it, get to know your body, these systems and in-joy the rewards.