TheĀ FootyFit BlogĀ
Training, Performance & Football FitnessĀ
The FootyFit Blog shares practical insights on strength, speed, running mechanics, conditioning, and injury prevention to help footballers train smarter, build resilience, and maximise performance on the field.
Reactive Strength Index (RSI): The Key to Unlocking Explosive Power in Your Training
Feb 02, 2026
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When it comes to building speed, power, and explosiveness in sports, thereā€™s one key measurement that can help guide and shape your training program: the Reactive Strength Index, or RSI. This metric h...
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