Hoka footwear, known for its thick, ultra-cushioned soles and popular among athletes, healthcare professionals, and a wide range of everyday wearers, is facing scrutiny from some experts who warn of potential long-term health consequences.
Originally designed for trail running with enhanced cushioning to absorb impact over long distances, Hoka shoes feature midsoles typically measuring 30mm to 40mm thick, significantly more than the 15mm to 30mm found in standard running shoes. This design aims to reduce stress on joints like ankles, knees, hips, and the lower back by absorbing impact forces. The cushioning also dampens the sensation of the ground, which can be beneficial on uneven terrain by distributing pressure evenly and preventing localized pain.
However, Dr. Zac Cartun, an orthopedic insole specialist, suggests that for daily walking and standing, these shoes may not be the optimal choice. The increased height of the foot off the ground can create greater rotational force, or torque, around the ankle if the shoe rolls sideways. Cartun noted that while the ankle can manage some rotation, the knee is primarily designed for forward and backward motion, potentially leading to knee pain when subjected to side-to-side twisting forces.
Altered walking mechanics due to the shoes' cushioning could also affect the knees, hips, and lower back. Furthermore, Cartun posits that the reduced sensory feedback from the ground may lead to less engagement from the small muscles that support the foot's arch. Over time, this could weaken these muscles, potentially increasing the risk of conditions like plantar fasciitis and general foot injuries due to a less stable foundation.
Concerns have also been raised regarding balance, particularly for older adults who may already have compromised balance. The reduced ground sensation could diminish their ability to correct for uneven surfaces, potentially increasing fall risks. Additionally, the shoes' typical design with a slightly raised heel can increase pressure on the ball of the foot, potentially leading to metatarsalgia. A consistently elevated heel may also shorten the Achilles tendon, raising the risk of injuries and tendonitis.
For individuals who spend extended periods standing, such as nurses or factory workers, the ultra-cushioned design may exacerbate issues like muscle fatigue and back injuries. Cartun points out that the shoe's structure may prevent the big toe from extending outward, a natural action that provides foot support and helps prevent fatigue. This limitation could be counterproductive for those seeking to reduce foot strain during long hours of standing.
While these concerns are raised, the notes indicate there is currently no definitive evidence proving Hoka shoes directly cause these problems. Some foot specialists maintain that highly cushioned shoes can be beneficial, especially for runners or individuals with existing foot pain. Hoka shoes have been observed on notable figures including former President Joe Biden, Reese Witherspoon, and Natalie Portman.
Cartun suggests that for everyday wear, firmer sneakers with a zero drop and a wider toe box, like Altras, might be a better alternative. For those who wish to continue wearing Hokas, he recommends using a firm orthotic insert that provides sufficient feedback and structural support to mitigate some of the potential downsides.
Dr. Brandon Haghverdian, an orthopedic foot and ankle surgeon, emphasized that the primary goal of footwear should be to enhance comfort, reduce joint loading, and minimize fatigue. He advises matching footwear to specific activities and transitioning gradually when changing shoe types. Persistent discomfort, he added, warrants professional evaluation to determine if a different shoe is more suitable for an individual's biomechanics.