Ying Lin

The Science Behind Jefit’s Load Progression Engine

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One of the Core Engines Powering Jefit’s New Progressive Overload System Jefit’s new Progressive Overload (PO) System is powered by several intelligence engines working together: Each engine covers a different dimension of progress.The Load Progression Engine is the one you feel every session — the system that decides your next weights and reps based on how you’re actually performing. […]

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The Stimulus Volume Engine

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How Jefit Tracks the Quality and Balance of Your Weekly Training Workload In strength training, volume isn’t just how many sets you do — it’s how much meaningful work your muscles actually perform. The Stimulus Volume Engine is Jefit’s way of translating your logged workouts into a real measure of training stress and adaptation potential.It’s part of

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The Movement Balance Engine

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Why True Progress Requires Balanced Pattern Strength and volume show how much you’re progressing — but balance shows how well. The Movement Balance Engine is the third pillar of Jefit’s Progressive Overload (PO) System and one of the key components behind your NSPI dashboard.It helps you see how evenly your training stimulates all major movement patterns — ensuring your progress stays stable, strong,

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The Strength Engine

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How Jefit Measures and Guides Your Real Progress Building strength isn’t just about lifting heavier — it’s about understanding how your body adapts across every movement pattern. The Strength Engine (powered by Jefit’s Load Progression model) is part of Jefit’s Progressive Overload (PO) System and the foundation of your NSPI dashboard.It helps you see how your strength is changing — pattern by

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The North Star Progress Index (NSPI)

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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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