Step up and press (contralateral) with knee raise ("Step up and through" Hip/knee extension strengthening - pressing opposite arm overhead, with dumbbell)

Stand up straight facing a step.
Place one leg on the step and hold a weight in the opposite hand.
Bend your elbow so that the weight rest just in front of your shoulder.
Ensuring your knee travels directly forwards over your toes, step up while simultaneously straightening the arm with the weight directly up towards the ceiling.
Bend your elevated leg through, bringing your knee up in front.
Keep your gaze ahead and your abdominals strong throughout.
Control the movement as you lower back down to the floor, leaving the same leg on the step.
Repeat this movement.