Fast Twitch T-Shirt
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![Fast Twitch T-Shirt Fast Twitch T_Shirt](https://rlv.zcache.com/fast_twitch_t_shirt-r611cbb8187234ab1bf8cb2079c74d346_k21k6_500.jpg)
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Fast twitch or slow twitch? Show the world that you're explosive, that you've got spring in those muscles!
Fast twitch or slow twitch? Show the world that you're explosive, that you've got spring in those muscles!