"We all know that “doing core” is important ancillary work for endurance training efforts. However, traditional “ab circuits” (high reps, short rests) actually do very little to prevent injury or provide the stabilizing benefits we are really seeking with “core” work. Furthermore, fitting auxiliary strength work around a busy schedule can prove challenging and may often fall by the wayside. These are some efficient exercises and protocols for runners who want to see specific adaptations to the demands of the sport."