The study in the link you posted was based on performance data at the end of a 6week SKD (strict keto diet)... i recently did 10 days of SKD and i can confirm to you that it will pretty much destroy your ability to do anything athletic..

Most of the weightlifters who are on Keto diets are doing CKD (cyclical keto diet) a 10-14 day SKD followed by weekly Carb-Ups that last 36hrs..

most of the studies involving endurance athletes using Keto were using TKD (targeted keto diet). A normal SKD is maintained- with the addition of carbs 30min pre workout / during long workouts/ and post..

Since i feel track sprinting is i basically a combination of the two- i do my own little hybrid.. I add low doses of carbs pre/during/post workout and do a shortened carb-up.. mine is only 4hours..