完整指南（英文）
Meaning and tradition
Prithvi is Sanskrit for earth, and the gesture is also called the Mudra of Earth. It belongs to the hasta mudra systems popularized in modern yoga and Ayurveda-influenced hand-gesture manuals and is not a gesture from the classical hatha yoga texts. Prithvi is also the name of the earth goddess in Vedic literature, which gives the name its grounding sense.
By the finger map, thumb is fire, index is air, middle is space, ring is earth, little is water. Joining the ring finger (earth) to the thumb (fire) is read in these systems as strengthening the earth element.
How to practice
Sit in Easy Pose with the spine tall, or stand in Mountain Pose or Tree Pose with the hands relaxed at your sides. Turn the palms up (on the thighs when sitting). Touch the ring fingertip to the thumb tip, with the other fingers straight but soft.
Pair it with Dirga Breath or the even count of Sama Vritti. Hold for 10 to 20 minutes, imagining weight settling into the seat, then release.
If you practice standing, let the arms hang naturally and keep the knees soft, so the shape stays effortless. When sitting, a cushion under the hips helps the spine stay tall for the full length of the hold.
Tips and common mistakes
Use feather-light contact. The tips touch; they do not press or pinch.
Mind which fingertip touches. Unlike Gyan Mudra, where the index meets the thumb, here it is the ring finger. Unlike Varun Mudra, where the little finger touches the thumb, here the little finger stays extended. Unlike Akash Mudra, where the middle finger meets the thumb, here the middle stays extended. Unlike Surya Mudra, the ring finger is not folded down and covered by the thumb; its tip meets the thumb tip.
Keep the shoulders down, both hands identical and the palms up.
Do not splay the extended fingers rigidly; let them rest naturally.
Tradition vs. evidence
Claims that this gesture strengthens the body, helps skin or hair, or treats weakness are traditional and unsupported by clinical research. What is defensible is the steady hand shape as an attention anchor and its pairing with slow breath. The grounding feeling is real for many people, but it comes from sitting still and focusing.