In 2003 Penny opened HYD, Sydney's first Shadow Yoga studio. Introduced to yoga by her father (a devotee of Baba Muktananda), she attended regular Iyengar yoga classes from 1989. Her studies with Sundernath (Shándor Remete) started in 1993. Penny continues to train under the guidance of Sundernath and Emma Balnaves, founders of Shadow Yoga. Penny is an approved Shadow Yoga teacher and registered Senior teacher with Yoga Australia.