The North Star Progress Index (NSPI)
How Jefit’s NSPI Measures Your Weekly Training Adaptation Your Window Into How Progress Really Works The North Star Progress Index (NSPI) is the intelligence layer inside Jefit’s new Progressive Overload (PO) System— the part that helps you see how your body is adapting and performing over time. While the PO system drives how your workouts evolve, the NSPI explains why — translating your logged […]
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