Rotatable seat cradle

A combination, including:

• a chair base sitting on the ground;
• a rotatable seat cradle in which a user is to be seated, said seat cradle being held by said chair base above the ground and comprising a back at a first end thereof against which the seated user's back is received, a front at the opposite end upon which the user's legs are laid, an intermediate pelvic support bucket lying between said back and said front within which the user's pelvis is received, and a pair of sides spaced from and lying opposite one another, the front of said seat cradle lying above the bottom of said pelvic support bucket such that the user leaning forward in the seat cradle causes the user's legs to apply a pushing force against said front by which to correspondingly cause said seat cradle to rotate and thereby unload the user's upper body weight from his pelvic sacroiliac joints so as to induce pelvic tilt and lumbar lordosis;
• and
• a yoke connected to said chair base, said rotatable seat cradle pivotally connected to said yoke so that said seat cradle is rotatable relative to said yoke and the chair base to which said yoke is connected.