Chas Stumpfel is a research physicist (retired) with a background that includes various high speed imaging applications. He is a recreational player who has been interested in tennis stroke techniques since the 1970s, especially those for the serve. In 2011, he was surprised and fascinated to learn of research of that showed the racket head speed for the serve was largely powered by a joint motion that was not well known in tennis.
Chas Stumpfel
Biomechanics
External followed by internal shoulder rotation—but how are they created and enhanced? In part one of this series, (Click Here) we looked in detail at the critical role of upper arm rotation in high performance serving. We saw how internal...
Biomechanics
After playing tennis for over 40 years, I made a sudden and unexpected discovery about the serve. In the 1980s, I had played league tennis at the 3.5 to 4.0 level and for two years had won the championship of...