Straight leg skip ("Pillar skip, forward" Cardiovascular workout)

Stand tall with your arms at your sides.
Lift one knee in front of your body as your opposite arm swings forward.
Fully extended the lifted leg and use your glutes to pull your heel back down towards the ground and generate a double foot contact with your foot, moving your body forward as the other leg and arm swing forward.
Repeat the movement pattern for the full set.