Complex sentence: He has completed the Yoga Works basic Hatha Yoga instructor program; is presently studying Pentjak Silat (an Indonesian fighting system) with Guru Stevan Plinck, and Ashtanga Yoga (an aerobic form of yoga).
Split into simpler sentences: He has completed the Yoga Works basic Hatha Yoga instructor program. He is presently studying Pentjak Silat (an Indonesian fighting system) with Guru Stevan Plinck, and Ashtanga Yoga (an aerobic form of yoga).