Question: what should i do before exercise?
Answer: Prioritize getting enough good quality sleep. ... 
Hydrate, hydrate, hydrate. ... 
Grab a snack. ... 
Make sure you're wearing the right clothes and footwear for the workout you're doing. ... 
Work in a dynamic warm-up. ... 
Stretch it out. ... 
And use a foam roller. ... 
Refuel with post-workout nutrition.