{
  "id": "BL40",
  "name": {
    "en": "Weizhong",
    "gloss": "Bend Middle",
    "zh-Hant": "委中",
    "zh-Hans": "委中"
  },
  "channel": {
    "id": "BL",
    "order": 40,
    "of": 67
  },
  "location": {
    "text": "At the centre of the crease behind the knee, between the two tendons."
  },
  "for": [
    "low back and spine ache",
    "weak legs"
  ],
  "press": {
    "text": "Knee bent, gentle fingertip pressure, about a minute each leg.",
    "seconds": 60,
    "sides": "both"
  },
  "cautions": [
    "Skip over swollen, tender or varicose veins behind the knee."
  ],
  "source": "Lingshu, chapter 2",
  "url": "https://acupoints.com/en/points/bl40",
  "lastReviewed": "2026-08-24"
}