After people with severe obesity lose a lot of weight, they tend to walk faster and take longer steps, which means their knees don’t get as much relief as expected — the pressure only goes down by about a third instead of two-thirds, so the knee load drops about as much as the weight they lost.

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Evidence from Studies

Supporting (1)

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Reductions in knee joint forces with weight loss are attenuated by gait adaptations in class III obesity.

Cohort Study

Human

2016 Mar

After major weight loss, people with severe obesity tend to walk faster and take longer steps, which partly cancels out the benefits for knee joint force. The study found exactly what the claim says: the improvement in knee force is cut in half because of these natural changes in walking style.

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No contradicting evidence found

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Source Study

Reductions in knee joint forces with weight loss are attenuated by gait adaptations in class III obesity.

Score: 24

DOI: 10.1016/j.gaitpost.2015.12.040

Similar Assertions

If someone with severe obesity loses about a third of their body weight, their knees experience nearly two times less pressure when walking — meaning their joints get a lot more relief than the weight they lost would suggest.

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When people with severe obesity lose a lot of weight, they start walking differently — taking longer steps and moving faster — and this might actually reduce some of the benefits that weight loss should have on their knees when walking every day.

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