@MHathin r/Sprinting • Recommends
On “Marcel jacobs runs on his toes”
[How about every single guy in this past 100m Olympic final 100m, including the guy mentioned inthe OP as not doing so]. If watching on a PC, you can use the period and comma keys to go frame by frame and see everyone's entire foot on the ground. It's a good angle to see them around 2:40 or 2:45 or so.