THE DAVID GREY REHAB PODCAST #15 Daniel Back on Jump Science, Fast Eccentrics & Hip vs Knee Dominance
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Mar 17, 2022 Daniel Back, athletic development coach and founder of Jump Science, breaks down jump and sprint training with science-based clarity. He covers why sprinting helps jumping, classifying hip versus knee dominance, heel-elevated work and ankle stiffness, fast eccentric methods and practical plyometric choices. Short, sharp takes on training specificity, rest management and tools to fill athletes’ physical gaps.
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Prefer Deload Weeks Over Complete Rest
- Use planned easy weeks or reduced-frequency training rather than total rest to preserve adaptations while recovering.
- For in-season or overloaded athletes do two short sessions per week instead of complete layoff to maintain fitness with less stress.
Less Ankle Mobility Can Benefit Elastic Speed
- Ankle dorsiflexion isn't always beneficial for top-speed athletes; Daniel purposely uses heel-elevated work to reduce ankle mobility.
- He observed elite elastic sprinters often have relatively immobile ankles and avoids excessive deep dorsiflexion for them.
Hip Versus Knee Dominance Explained By Bar Path
- 'Hip versus knee dominant' describes bar path and loading, not aesthetics; hip-dominant squats create larger hip moments while upright squats bias quads.
- True extreme knee-dominance is rare and often appears in young athletes with underdeveloped glutes.