The human arm has seven degrees of freedom at its joints, but placing the hand at a point in space requires only six. For every reach, every throw, every gesture, the nervous system must select one solution from a continuum of possibilities — and it does so in milliseconds, without apparent effort. This is the Degrees of Freedom Problem, posed by the Soviet neurophysiologist Nikolai Bernstein in The Co-ordination and Regulation of Movements (1967). Bernstein observed that the problem is not merely computational but fundamentally ill-posed: the equations of motion are underdetermined, and no unique solution follows from the task specification alone. How, then, does the body move at all? The question has generated decades of competing answers. Bernstein himself proposed that the nervous system reduces degrees of freedom by temporarily locking joints into synergies — rigid couplings that simplify control. Later work by John Scholz and Gregor Schöner introduced the Uncontrolled Manifold hypothesis (1999): the nervous system does not eliminate redundancy but exploits it, allowing variability along dimensions that do not affect the task while stabilising those that do. Optimal control theories, drawing on engineering, propose that the brain selects movements by minimising cost functions — effort, jerk, variance. None of these frameworks is complete. The Degrees of Freedom Problem belongs in the Body School because it is the foundational mystery of all embodied play: every physical game is a demonstration of a solution the body has found to a problem neuroscience has not.