As a result of our work with equestrian and the riders’ need to improve their balance and riding skills, we introduce the Saddle Chair. The Saddle chair is an accessory and is easily mounted on the Vibrosphere®. The seat can be adjusted up and down. It is of course not only riders that can utilize the Saddle Chair. It is a challenging and effective complement both for rehabilitation and training as a mean to improve core stability and to activate the trunk.