At the 1932 Los Angeles Olympics, the men’s 100m freestyle reflected swimming’s early era, with basic training methods, minimal technology, and slower times. Japan’s rise in the event highlighted technique improvements, but races still emphasized endurance and raw athleticism. By Tokyo 2020, the event had transformed into a showcase of speed science and precision. Advanced training, biomechanics, nutrition, and pool design pushed performances to historic lows, with explosive starts and underwate