1.8kg? Intended more miles but legs strangely wrecked, guess didn't like having no break after XC race

1kg? Legs initially reluctant

2kg? From course to labs, snowing a bit, preferring grass

2kg? To training course, maximising grass to save studs

1kg? Creaky plod, preferring frozen mud/grass paths to save XTalon studs

Preliminary result: alternating 1x770m flying-start laps, 6 laps with each kind of shoe, aiming for steady 145 bpm and with no indication of time or pace... Hyperspeed speed=3.95 +/- 0.03 m/s, aerobic efficiency=986 +/-6 beats/mile @ 145.3 bpm avg; Vaporfly4 speed=3.99 +/- 0.02 m/s, efficiency=974 +/- 5 beats/mile  @144.8 bpm avg. So efficiency was 1.2% better in Vaporflys but standard error was about 0.6% in each number, so on the limit of significance!  Both shoes with my own heel modifications. Now written up as webpage: http://www.wartnaby.org/running/hyperspeed_vs_vaporfly/index.html

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Charlie Wartnaby

HyperSpeed vs VaporFly experiment, then 25xCastle Hill. Last LR before 100K in 7d.

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1.8kg? Intended more miles but legs strangely wrecked, guess didn't like having no break after XC race

1kg? Legs initially reluctant

2kg? From course to labs, snowing a bit, preferring grass

2kg? To training course, maximising grass to save studs

1kg? Creaky plod, preferring frozen mud/grass paths to save XTalon studs

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Daftar Gratis. Pantau kemajuan dan capai target Anda. Bergabunglah dengan 100 juta orang aktif di Strava.

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