For me there is no greater endorphin rush than listening to some really good bassey music and really pushing myself on a cardio machine
Rum & bass + rowing machine really got the adrenaline going for me, was actually comparable to being high for a period of time
Lifting weights is different but feels very good to see yourself in the mirror lifting something heavier than you’ve ever done before and you get addicted to chasing that feeling
I think part of the mindset is getting yourself to embrace the physical punishment and actively seek it out, couldn’t tell you exactly how to do that but for me a lot of the time knowing it’s going to be difficult will get me more excited now