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This week’s guest is JB Morin, a French researcher doing some of the best, and most applied work in the world in regards to sprinting and jumping. JB has produced, and been involved with, some landmark studies that are helping track and speed coaches to understand more about what makes elite athletes so fast, and how we can train this type of athleticism. Today, we’re going to talk about some awesome research and application on speed, acceleration, and vertical jump training.   Topics include: Force-Velocity profiling in jumping Over-speed jumping Training the ankles for jumping and sprinting Acceleration efficiency Heavy sled sprints And more! There were a few cool pieces that I picked up in this interview that I actually went and used myself immediately in the week following this podcast recording.  One of the things I did some heavy sled training in the weight room, combined with the Freelap BLE timing system, and found an instant and noticeable improvement in my sprint acceleration ability 2 days later.  I am most definitely an athlete who lacks force in my acceleration, and if you listen to the interview, you’ll know why this is just the ticket for so many athletes. Giving the CNS what it needs, when you do it right, has instant ramifications. View more podcast episodes at the podcast homepage. Today’s episode is brought to you by SimpliFaster, supplier of high-end athletic development tools, such as the Freelap timing system, kBox, Sprint 1080, and more. Key Points: Force/velocity profiles and jumping ability, as well as training recommendations for imbalance correction How research has shown that overspeed jumping is a necessity for many athletes to improve their maximal jump Optimal rates of force development in overspeed jumping Upcoming app technology that will help coaches easily assess jumping and jump stiffness/force production What makes the fastest sprints as good as they are in terms of horizontal and vertical force production Ideas on the balance on ankle stiffness, and hip extension power in producing athletic speed Ways athletes can approach training stiffness in the ankles and lower legs JB’s work on the ratio of forces in acceleration and top-end speed How efficient athletes can accelerate faster than their stronger counterparts How ratio of force in sprinting can help coaches determine which way athletes need to train to improve speed JB’s thoughts on weightlifting for sprinters Heavy sled training as a viable acceleration training tool “Jump height increased in all subjects of the experimental group (which trained athletes based on their force/velocity need), and it only increased in half of the subjects of the control group (which trained all athletes in a cookie cutter program)” “If you need to improve your (jump) velocity, squat jump is not fast enough, you need assisted jumps” “If you train athletes all the same, for some of them, you miss the point” “30% faster lower limb extension compared to squat jump is very important in overspeed jump training” “Before you want to run fast, you need to generate that speed” “To increase acceleration, you need to produce high amounts of horizontal force onto the ground” “Once you reach top end speed, then yes, the horizontally directed force onto the ground helps you to handle that speed” “I see things as generating power, and then transmitting it effectively onto the ground” “If you have an imbalance, if you are able to transmit very well forces onto the ground because of ankle strength, but you don’t generate power, then you have something missing”,  “If you are able to generate a huge power with the hip extensors, but the transmission of the foot is weak, then it is useless as well” “The higher an athletes power, the more difficult it is to transmit it (to the ground)” “What’s interesting is to work on single leg stance (in ankle strength...