Katy Bowman of Aligned and Well & the Restorative Exercise Institute -- Open Toes, Open Hearts
Because a flip-flop upper is so minimal, you have to assist keeping the shoe on by gripping your toes. After awhile this motor pattern leads to shortened toe muscles which can affect balance, foot arch strength and lead to toe contractures and “hammer toes.” If you are gripping to keep your shoe on, this also creates a new, less natural gait pattern.
Kelly Starrett of the Mobility WOD -- Athletes Don’t Wear Flip-Flops
I know where you live it’s ‘Hot’. I know you like to look ‘cute’. But you are destroying your feet mechanics and setting up serious problem for your heel cords and calf. Best defense, no be there. You know I’m right. Take the flip-flop/slipper challenge. See if you can walk/run in your flips without clinching your big toe.
Roland Denzel of this blog -- It's National Flip Flop Day
People walk funny in them and they only think they are lookin' good. You can usually hear them coming from a mile away. Shuffling through Starbucks is no way to go through life, and if you're shuffling now, just see how much you shuffle in a few years. Besides, isn't it a little cold in sbux to be wearing flops?
Better choices are a shoe that's as open as you like, but stays on without forcing you to grip your toes.