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Chris Korfist SG Speed School
39 members • $30/m
3 contributions to Chris Korfist SG Speed School
25d •Â
Shoes for Training and Competition
Curious about others opinions on shoes for training and competition. I have a couple of youth athletes for summer track training in Nike Zoom Rival Waffle 6 and competing in Adidas Adizero Prime Sp3. They run the 100, 200 and 400. My hypothesis is that training in the waffles will help strengthen the feet. Open to get others opinions on footwear.
Apr 21 •Â
Questions for Korfist-Kerr Talks
Hi Everyone. Chris and I are recording a talk Thursday. Does anyone have any questions about hips? We've talked upper body, trunk, we're into the hips now! Let us know!
0 likes • Apr 30
Whenever we get to legs and below, can we bring up the optimal block settings based upon the leg length article? Is this methodology implemented for the entire team and how? If not, is this specifically for individuals? For feet, do the 'super spikes' stack with the spring ankle exercises or are the spikes irrelevant due to the spring ankle exercises?
Mar 8 •Â
Block Settings for Starts
I was reviewing the Winning the 1st 10m video series from 2 years ago. The video referenced the Italian study using the leg length for block settings. The article used 60% of the measured length for the front block setting. Coach Korfist mentioned 50% of the length. Can you help me understand the difference between 60 and 50%?
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Active 13d ago
Joined Feb 23, 2026