The Fartlek - Skater Jumps (45 Degree)

https://vimeo.com/528304157
Off Ice Exercise Tags: 

Place one leg in front of the body with knees & toes in alignment; stabilize the knee upon ground contact & then drive the front leg through the ground finishing with the big toe pressing the heal off the ground; flex the oppositve knee above hip level (bring heel to butt) before repeating the movement on the opposite side.