Home › Authors › Declan Condron 👤 Declan Condron 6 books Books by Declan Condron Back strengthening for health Back strengthening for health & fitness 2008 Pilates to strengthen & tone your body 2008 Swiss ball for core strength 2008 Yoga for strength & flexibility 2008 Swiss Ball Core Training w/DVD 2007 Swiss Ball Core Workout 2007