Crescendo 4×4
Evidence-based Norwegian 4×4 interval timer with an 8-level
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My first try with full Norwegian 4x4 protocol as brutal. Though more people might like an easier way into it.
Evidence-based Norwegian 4×4 interval timer with an 8-level
My first try with full Norwegian 4x4 protocol as brutal. Though more people might like an easier way into it.
