When scientists study a special workout method, they sometimes change how it's done from the original plan, making it hard to compare results and figure out what really works.

Pre-exhaustion training makes your workout sessions about one-third shorter than regular training methods.

When you tire out a muscle with one exercise before doing a bigger workout, you can't do as many reps in the big workout, so you end up doing less overall exercise than if you just did the big workout alone.

When you do exercises back-to-back with little rest (pre-exhaustion training), it feels harder than doing exercises with normal rest breaks (traditional training).

Doing a special warm-up before lifting weights lets you finish your workout faster while still building just as much muscle.

When you do a special workout called pre-exhaustion, you get tired faster and end up lifting less total weight compared to regular workouts.