The Monkey Buddha Archives:
For New Years I was over my brother's house, and his soon-to-be wife had this yoga block with a sacred geometry motif. It has the center circle of the Seed of Life symbol, and is covered by The Flower of Life pattern.
Yoga is a discipline that is intertwined with spirituality, so it's not surprising that this design is incorporated into such equipment.
Incidentally, I am heading with my fiancee to a "Yin-Yang Yoga" class tonight. I have taken yoga classes before, and she found a new place close to where we live so I'm going to check it out.