THE DATA

Mea­sur­ing sleep by more than just winks

Cyclist - - Performance -

Over six weeks, I un­der­took three func­tional thresh­old power (FTP) tests on a Wat­tbike at Fit­ness First (fit­ness­first.co.uk), com­pris­ing 20-minute power and max­i­mum minute power tests. I also did a daily Psy­chomo­tor Vig­i­lance Test (PVT) to mea­sure re­ac­tion times in mil­lisec­onds over two min­utes (go to sleep­dis­or­der­s­florida. com/pvt1.html to have a go), and kept a sleep diary with data logged via a Fit­bit Blaze ac­tiv­ity tracker (£159.99, fit­bit.com). Here are the re­sults.

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