But while the Sritattvanidhi extends the written history of the asanas a hundred years further back than has previously been documented, it does not support the popular myth of a monolithic, unchanging tradition of yoga poses. Rather, Sjoman says that the yoga section of the Sritattvanidhiis itself clearly a compilation, drawing on techniques from a wide range of disparate traditions. In addition to variations on poses from earlier yogic texts, it includes such things as the rope exercises used by Indian wrestlers and the danda push-ups developed at the vyayamasalas, the indigenous Indian gymnasiums. (In the twentieth century, these push-ups begin to show up as Chaturanga Dandasana, part of the Sun Salutation). In the Sritattvanidhi, these physical techniques are for the first time given yogic names and symbolism and incorporated into the body of yogic knowledge. The text reflects a practice tradition that is dynamic, creative, and syncretistic, rather than fixed and static. It does not limit itself to the asana systems described in more ancient texts: Instead, it builds on them.
Excerpt from Yoga Journal Article by Anne Cushman