SSC
Reactive Strength vs Elastic Strength: Key Differences and How to Train Each
Reactive and elastic strength share the stretch-shortening cycle but train differently. Here is how each is measured and trained without stalling it.
Why CMJ Outperforms SJ for Daily Athlete Monitoring: A Neuromuscular Fatigue Comparison
Squat jump misses what countermovement jump catches. CMJ tracks neuromuscular fatigue 2.3x more sensitively, per longitudinal IMU monitoring evidence.
How to Test Leg Spring Stiffness: Hopping and Drop Jump IMU Protocols
Leg spring stiffness (Kleg) is the core SSC efficiency metric. A step-by-step 800Hz IMU protocol for hopping and drop jump testing and interpretation.
Stretch-Shortening Cycle: The Plyometric Foundation
A countermovement jump beats a static jump due to the SSC, but fast and slow SSC need different training. Here's the mechanism and RSI benchmarks.
Tendon Stiffness and Sports Performance: The Elastic Energy Connection
Muscle strength jumps 15-20% in 6 weeks, but tendons need 10-14 weeks to stiffen — a mismatch that raises injury risk. See 3 IMU proxies that track it.
How to Design a Plyometric Program: Science-Based Blueprint
Too many foot contacts too soon causes tendon pain, not power. Get the volume tables, exercise order by phase, and the RSI tracking that keeps it safe.