Dear J Geen
I am a chartered physio who uses the swiss ball on a daily basis both in clinical practice & exercise.
I feel that it is possible to achieve TrA/multifidus contraction when sitting on the ball as long as the patient has been shown how to find lsp neutral & providing that the ball is the correct size. Prof Janda has stated that the multifidus is very difficult to activate voluntarily, which means that the swiss ball is the ideal tool to achieve this as it is unstable. Swiss ball training & spinal stability is of special interest to me & I have been having very good results with using it on a variety of patients. I am hoping at some stage to do some research on the ball as there has been very little done to date. I have sold 5 balls for use as chairs for patients with lbp & each one has shown a huge improvement. I also feel that the ball is great when used prophalacticly,as Janda also states that if stability is increased by 50% it would reduce orthopaedic injuries by 80%