Kim Collins is perhaps best known for his longevity, having ran in his first World Championships in 1995 and then running in his last, 23 years later, in 2018 at the World Indoor Championships. Kim has a 100m best of 9.93, run at 40 years old, and has a World 100m gold, a Commonwealth 100m gold and a World 200m bronze, amongst other medals, and featured in three Olympic 100m finals. 

Follow Kim on Instagram @runkim100m and check out his online training program 

http://stride-to-sub-10-with-kim-collins.teachable.com/p/sprinting-made-simple