I read an interesting article on jumps. According to Yasuo Ikegami, Prof of Sports Biomechanics at Nagoya Univ (a top-tier research univ in Japan), the hangtime of Mao's 3A in the air is 0.45 sec in comparison to Miki's quad, 0.58 sec, and Yukari's 3A, 0.55 sec. A 10% increase in body height results in a 20% more difficulty in rotating a jump. Mao has grown 20 cm since she was 13 yrs old. Her hangtime was 0.55 at that time. So it has decreased by 0.1 second since then. Her personal trainer says she now compensates the decrease in hangtime by physical training to rotate faster.