Mudra means "seal" or "gesture" in Sanskrit: a deliberate position of hands, fingers or body used to channel attention and breath during practice and meditation. The most common are hand mudras - like Gyan Mudra, thumb and index finger touching - held comfortably while seated or breathing.
The mechanism is subtle but practical. Hands are densely mapped in the nervous system; giving them a fixed, gentle shape reduces fidgeting, slows the breath and gives the mind a quiet anchor. In meditation traditions mudras are also said to "seal" the energy of a practice - hence the name.
Benefits include steadier meditation posture, finer body-awareness in hands and shoulders, a portable focus tool (a mudra travels anywhere, even to a desk), and a ritual cue that tells the body it is time to settle.
At Zuga Fitness, mudras appear in the seated openings and closings of Hatha and pranayama classes, taught as optional tools for focus, never requirements.