If you are looking for a way to combine your exercise time and devotional time, I have the book for you! In Praying with the Body not only you will learn how to implement praying the psalms while doing yoga type poses you will also be able to keep three of the Liturgical prayer hours. This is a beautifully written and designed book. You may want to also check out the other books in the Active Prayer Series.
Praying with the Body: Bringing the Psalms to Life (Paraclete Press, 2009)