We don’t suppose we are telling any big secrets here by divulging that researchers at Rensselaer Polytechnic Institute developed a technique last year that uses stop motion video to help the Olympic swim teams. Professor Timothy Wei and team’s Digital Particle Image Velocimetry video-based flow measurement helps trainers analyze how much energy is exerted by a swimmer and how their body affects the water. Whew. Check out the video to see how it’s done.