The progressive ladder is the strongest part because it addresses the gap between knowing the protocol and actually being able to complete it. The screen-locked audio coaching also feels well matched to the reality of doing intervals rather than watching a timer.
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My first try with full Norwegian 4x4 protocol as brutal. Though more people might like an easier way into it.
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The progressive ladder is the strongest part because it addresses the gap between knowing the protocol and actually being able to complete it. The screen-locked audio coaching also feels well matched to the reality of doing intervals rather than watching a timer.