myleftfoot1978
Striker
well studies have shown anything from 1.8-6 percent gain on peoples times, I will just say 4% of my pb best would be would take 44.5 seconds of taking me to a 17.45pb and that's around what people I know who are usuing them are taking off there times, anyhows I will never know as I don't have 200 knicker to spend on trainers, has anyone read up on them as I have and it defiantly is knocking them times offI would buy 2 of them and be 8% faster.
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