Possible Clues:

• Slo-mo meditative discipline
• Little thanks to one Greek letter - it exercises the Chinese
• Chinese system of exercise
• Discipline involving slow, steady movement
• Chinese meditative exercises
• Chinese system producing excellent children in time half forgotten
• Chinese system of exercise and self-defence
• Stress-reducing discipline
• Thanks to Wilhelm I, one's formed system of defence
• Exercise system requiring harmony of yin and yang