Running form/economy/efficiency at speed. Whatever you want to call it.
Improving running form is underrated on these forums as a means to improving performance. Often when the subject is raised, the dogmatic advice is to “just run more miles and your form will take care of itself”. This is bad advice. Improving running form, all else being equal, will improve your performance more than any other lever provided you are training at a reasonable level.
How to improve running form? You have to re-train fundamental movement patterns. Strength training might help but is not enough on its own. Drills might help but are not enough on their own. You have to practice running differently. Forward lean, powerful push off, strong engagement of the hamstrings and glutes, superb hip extension, elbows back, landing under your COM. These are fundamental characteristics of elites’ running style.
Discus.