"Static stretches" refers to a type of stretching exercise where you hold a position for a certain amount of time to stretch your muscles. Full definition
Anyway, this is, as always, just one study — but probably worth keeping in mind if you do a lot of static stretching before cycling. (sweatscience.com)
It's important to keep safety in mind when you're doing static stretches in particular. (health.com)
Make sure to strength both muscles with static stretches following exercise bouts. (ptinto.com)