Please do the following exercises.
1 – Tennis ball plank. ( Do as many as years you are old on each arm )
Focus on tightening your core muscles with straight back. Scoop the ball back in an upwards motion. Balance pads used in this video are optional.
2 – Move ball side to side. ( Do as many as years you are old on each arm )
For a core movement, this can be done as per below but without the push ups ( Although no one would complain if you did ) Use a normal ball if you don’t have a medicine ball, which this goalkeeper is using.
3 – One leg balance to “T” ( Do as many as years you are old in each leg.)
Focus on straight back and extending your leg out behind you as straight as possible.
4 – Superman’s ( 10 second hold ) x 3
Legs and straight arms off the ground.