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10/09/2017 at 08:58
#20494
Yes, Nathan Heaney did a study on that: https://nathanheaney.files.wordpress.com/2014/03/heaney-williams-lorenzen-kemp-2009-comparison-of-a-yoyo-ir1-test-and-a-vo2max-test-as-determination-of-training-speeds-and-evaluation-of-aerobic-fitness.pdf
But due the design of the YoYo you can’t convert without too much error