En av de första studierna av effekterna av Vaporfly på motionärer, litet n och begränsad uppföljningstid i en cross-over design men också en jämförelse med Saucony Endorphin "racing flat" (Pro?) eller egen sko.
Vad man fann? Att Vaporfly minskade syreförbrukningen med, tada... 4%.
https://www.sciencedirect.com/science/article/pii/S2095254620301630"Results: Oxygen consumption (mL/kg·min) was lesser in VP4 (from 4.3% to 4.4%, p ≤ 0.002) and FLAT (from 2.7% to 3.4%, p ≤ 0.092) vs. OWN across intensities, with a non-significant difference between VP4 and FLAT (1.0%–1.7%, p ≥ 0.292). Findings related to energy cost
(W/kg) and energetics cost of transport (J/kg·m) were comparable. VP4 3-km TT performance (11:07.6 ± 0:56.6 mm:ss) was enhanced vs. OWN by 16.6 s (2.4%, p = 0.005) and FLAT by 13.0 s (1.8%, p = 0.032). Times between OWN and FLAT (0.5%, p = 0.747) were similar. Most runners (n = 11, 61%) ran their fastest TT in VP4.
Conclusions: Overall, VP4 improved laboratory-based RE measures in male recreational runners at relative speeds compared to OWN, but improvements in VP4 were not significant vs. FLAT. More runners exhibited better treadmill TT performances in VP4 (61%) vs. FLAT
(22%) and OWN (17%). The variability in RE (–10.3% to 13.3%) and TT (–4.7% to 9.3%) improvements suggests that responses to different types of shoes are individualised and warrant further investigation."
