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MediumAbout 6 minOn your own
A side-on throw into a wall with a step behind first, like a fielder's footwork into a throw. Moves the weight from the back leg to the front and turns it into speed.
Video: Muscle & Strength
Also: From a still start
Stand side-on to a solid wall a few metres away, ball at your waist.
You need: A medicine ball (2 to 4 kg) and a solid wall
Leave out the step: load and throw from a still start.
A heavier ball.