Like other have said, improve form. Or u can do an explosive workout. For example, when doing a squat, when you do the upwards motion, explode up ( while keeping it under control) this should help with some strength and improving your fast twitch muscles.

Cool, I´m going to the gym in a bit so I´ll be sure to do that.

You can sprint with leg weights, or buy a parachute and use that, really any form of resistance works. You could even just sprint the same distance over and over again and it will eventually improve. Also work your legs (calves especially) and get them stronger.

Thank you.