Triang Mukhaekapada Paschimattanasana – One foot transversely facing back intense west stretch (Triang means transverse, Mukha means face, Eka means one, pada means leg or foot, paschima means west, Uttana means intense.)
This is another forward bending posture –with one leg folded back alongside the thigh. This is NOT the “hurdlers stretch” as that stretch is contraindicated in the field of sports medicine (except for hurdlers!) due to the strain it places on the inner ligaments (medial collateral) of the knee.
Some precautionary work may be necessary. If you are very tilted in this posture you may need to practice Virasana or knee sitting to get the ankles, knees, and/or thighs enough range of motion to do the full posture. Sitting on your heels with feet and knees together is the easiest position, progress by moving your feet apart (keep your knees together) and your sitting bones toward the floor. When you are able to sit with your sitting bones on the floor you will be comfortable in triang mukhaekapada paschimattanasana. To make virasana more comfortable you can roll your calf out as you tuck your thigh in—although some would call this movement a fidget that requires too much thinking! Keep in mind if you are practicing virasana in place of the full posture, you are working externally on the body, and you will not be receiving the benefits of Triang Mukhaekapada paschimattanasana, so be careful not to let yourself get “stuck’ in virasana, but try the full posture regularly.
In general if you feel knee pain while in Virasana you should lift your hips up and either come forward onto your hands and knees or just lower your hips to the point of no pain. If you feel work or stretch in the ankles and tops of feet—you need this posture!
This pose cures a number of afflictions including body fat, water retention, swollen thighs, piles, and sciatica. It is reminded by Pattabhi Jois that these benefits come with consistent practice over a long period of time! In yoga terms this would be called durga kala (very long time) and nairantarya (without break).