Originally Posted by
ThermionicScott
When I ran cross-country in high school, "LSD" definitely stood for "long slow distance", the idea being that these were the runs for recovery and overall CV fitness -- am I wrong that emphasizing the "steady" part rather than a particular speed is more of a recent thing?
Yup, and it was clear even then that the only thing that LSD was good for was running long distances slowly. Speed work---intervals and fartleck on a golf course---was part of every serious runner's training.