Re: Sims 4 bodybuilder challenge-push the limits

Ok so I also have the body building Aspiration and figured out how to "push the limits" while energized. 

You need to wait for your sim to finish a workout and have the "good workout" moodlet. Then after that, any work-out is considered pushing the limits. 

I advise buying a treadmill. Tell your sim to work out until they stop on their own hence giving the "good work-out" mood let. Then go take an energizing (brisk)  shower giving you the energized moodlet then proceed to go back on the treadmill and you will see workout (push the limits)  and this until the quest is complete. 

Hope this helps ^_^