The intrinsic muscles of the hand are largely neglected in training, mainly because certain biomechanical principles must be applied in order for these muscles to be involved in hand exercises. A system of stretching and isometric exercises was developed. Men (12) exercised for 4 wk, 3 times daily. Significant improvement in 7 out of 12 strength measurements was noted. Exercise seemed to affect just the metacarpophalangeal joints range of motion, while distal and proximal interphalangeal joints remained largely unaffected.