The squat is a fundamental exercise in any person that is doing weight trainings routine and rightly so, It is a great exercise to engage several muscle groups and provide all round strength.
The benefits of the squat are not lost on those that are rehabilitating joints that have been degenereated by arthritis and any exercise that can strengthen so many muscle groups in the legs can only be good.
The main difference between the two different versions of the squat are obvoiusly the fact that the pilates version does this without weight, the strength is gained by doing the exercise so slowly that it works the muscles for longer over their full length – Perfect for arthritis sufferers.