Sprinter muscles in Running Posted August 16, 2010 I was wondering if 100 meters sprinters do any weight lifting or if they just run ? They're quite massive... The muscles they gain by running as fast as they can is the muscle they need, but lean mass gained in the gym could be just extra weight to carry, no ? I wanna add this to my training, just sprinting for a minute, and then 1 minute walking, then sprinting again, etc... To see if there's any change on the body. I guess it has to do with explosivity, like for martial artists, or lions, tigers, etc... Those are pics from haitian Bruny Surin who won many competitions for Canada.