When starting, lower your head, lower your center of gravity, and quickly push your legs to the back of your body in small steps. If your thigh muscles are strong enough, you can push the ground diagonally backwards with fewer steps. Then slowly raise your head, raise your center of gravity, increase your stride, and feel that your center of gravity is probably above your waist. Try to push your ankles back, try to accelerate or maintain the highest acceleration speed.
(Tip: Everyone's arms and legs are in harmony when running, so the greater the swing arm amplitude, the faster the swing arm speed, the greater the leg stride, and the faster the frequency of alternating legs. In other words, you should do swing arm exercises with dumbbells! )