Agreed jacknyc. I was going to post something similar to what you've stated, but I have just been so busy with work. My son's track coach always told him that to be a great 200m sprinter, you have to run 400M in practice. To be a great 100m sprinter, you must run 200M. So, all the 100M sprinters were required to run 400M/200M sprints in practice. I'm quite certain that's what made Boling the 100m/200m sprinter he is today was by running those 400M/800M in middle school and HS practice and at the meets. Also, it's not that anyone is pulling away in the last 30-40 meters in the 100M, it's who can maintain their speed the longest. I believe you reach top speed at the 50/60 meter mark. It's how long you can maintain that top speed before you break down. The 400m gave Boling the strength and stamina to maintain his top speed longer than anyone else in HS. The thing that hurt him is his start. He never trained for that 100M start. He needs to keep training as a 400M guy in practice and at the same time work on his 100M start. I don't know much, but if I were his coach, I would train him like a 400M sprinter, work heavily on his 100M start and only run the 200m and 60M indoor and 200M/100m outdoors, again train by running lots of 400M in practice. Just my opinion.