Trickle Down Physiology
So what’s trickle down physiology?
Basically it means using very short intense workouts (the higher training zones) to build endurance (the lower training zones) — hence the trickle down.
A decade or two ago, it was thought the only way to build endurance was to perform long slow workouts – called LSD, for long slow distance. Many cyclists, runners, and triathletes still rely on these workouts to this day. And in truth, they still have benefit for endurance athletes. Building a strong aerobic engine is key to continued progress in endurance sport.