Players lay flat on their back, supported with one leg balanced on a ball.
Then, keeping their hips high, they have to bend and straighten their free leg while the opposite leg stays balanced on the ball.
In this drill the abdominal muscles and leg muscles are strengthened.
This will help build a player's core strength which is needed to develop better balance.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.
As we enter the business end of the competition, we take a look at the remaining eight teams and the key talking points surrounding each side.