Lose a little weight, take load off joints

A US study found that for every 1 kg weight loss there was a 4 kilogram load reduction on the knee joint for every step taken during daily activities.

The benefits are substantial.
Losing weight is the most important modifiable risk factor for the development and progression of osteoarthritis.
Aa 5% weight loss over 18 months resulted in an 18% improvement in function and reduction in pain.