Dr Jean-Marc Sène has warned about the risks of wearing flip-flops for long periods during summer, speaking on the French television programme "Bonjour ! La Matinale TF1".
He explained that when people walk, they naturally strike the ground heel-first as part of a rolling foot motion. Flip-flops, he said, provide no support at all during this process.
Effects on feet and joints
Sène said wearers tense their feet to avoid losing the flip-flop, clenching their toes into a hook shape with no cushioning, which he said produces harmful consequences. He said toes suffer first, with tendinitis and a collapse of the foot's arch among the possible effects. Because there is no proper support, he said, the strain travels up to the knees and hips, causing joint pain. He also noted that a flip-flop can catch on an obstacle such as a cobblestone, which can cause sprains.
A dangerous habit while driving
Sène specifically advised against driving in flip-flops, warning they can become lodged under the accelerator or brake pedal.
He said there was no need to throw them away entirely, since flip-flops remain practical at the beach, in the sand or at the pool. But he said they should not be worn in town, recommending supportive lightweight shoes with good cushioning instead, adding that sandals were a great option.
