A strong core is the key to success. The problem is that many runners don't do core work at all. When they think about it, they tend to prefer the movements such as sit ups and bicycles, which are mainly aimed at the superficial core muscles (such as rectus abdominis and oblique muscles), while ignoring the deep core muscles that do most of the work in running and daily life.
runners must have strong feet and ankles as well. Methods: stand up straight. If you're new to running, you may want to face the wall or lean back in your chair to keep your balance. Push your belly and land on your feet.
then bend the knee a few inches. Stop before you straighten your legs and keep your heels up. Finally, put your heels back on the floor with straight legs. Repeat 10 times, and then repeat 10 times: bend the knees, lift the heels, straighten the legs, bend the legs, lower the heels, straighten the legs.