Add to cart Earthgym Toning with Stones Earthgym Toning with Stones Come tune your muscle tone with Stones! Stones are one of the most powerful magnets for Qi, or vital life energy and information from Nature. When we move with stones, we ignite our muscles and our breath. In this way, we draw in the Earth’s song and qi while cleanings our tissues with air. Come experience the alchemy of Stone!