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Weight Gain And Knee Pain – A ‘Big’ Link

By April 20, 2018June 12th, 2019Physiotherapy, Running, Sports Physiotherapy

Over the last decade Australia’s health has continued to worsen and burden our economy and health care system. In 2014/15 almost 2 in 3 adults and 1 in 4 children (aged 2-17) were overweight or obese in Australia. In 2011, 5 % of the burden of disease was attributed to individuals being overweight and obese.

It is widely accepted that obesity and being overweight have a link with the development and exacerbation of Osteoarthritis (OA). In 2014/15, 1 in 11 Australians (9%) had OA, approximately 2.1 million people, and 1 in 4 people with OA self-reported fair or poor health, twice as much as those without the condition. There has also been a 38% rise in the rate of Total Knee Replacements for OA from 2005/6 to 2015/16.

Weight reduction is one of the key modifiable factors in preventing and managing knee pain and osteoarthritis.  Weight management and exercise go hand in hand and but all exercises are not equal when is comes to knee load.

Forces transmitted across the knee joint during normal walking range between 2 and 3 times body weight. Therefore the net effect of each additional kilogram in body weight is multiplied by 2 or 3 times at the knee. Below is a list of normal activities and exercises and the load on the knee (tibia) x Body weight. (BW)


Activity Peak tibial force x BW
Treadmill Walking  (2-5 km/hr)2.5-2.8
Power Walking (6.5kn/hr)2.1 ± 0.2
Treadmill Jogging (8km/hr)2.8 ± 0.4
Stationary Bike Level 1-5 (60-90rpm)1.0 -1.5
Golf (lead knee)4.4 ± 0.1
Golf (trailing knee)3.0 ± 0.2
Tennis Serve4.2 ± 0.1
StairMaster Level 12.4 ± 0.1
StairMaster Level 33.3 ± 0.3
Elliptical Level 12.3 ± 0.2
Elliptical Level 112.2 ± 0.2
Leg Press2.8 ± 0.1
Rowing Machine0.9 ± 0.1


From the table above you can see that various activities have a higher or lower force on your knee joints. For those with knee pain or arthritis some lower load alternatives may be stationary bike or rowing.

A positive piece of information to take away is that any small reduction in weight can have a significant impact on knee load and knee pain. A reduction of 1kg could reduce the force by up to 3kg during walking and a reduction of 5kg could reduce the force by up to 15kg during walking.

If you are experiencing knee pain book in to see us at Bend + Mend in Sydney’s CBD. We are happy to give you advice on suitable exercises and modifications!



D’Lima, D., Fregly, B., Patil, S., Steklov, N., & Colwell, C. (2012). Knee joint forces: prediction, measurement, and significance. Proceedings Of The Institution Of Mechanical Engineers, Part H: Journal Of Engineering In Medicine226(2), 95-102. 
Overweight & obesity Overview – Australian Institute of Health and Welfare. (2018). Australian Institute of Health and Welfare. Retrieved 18 April 2018.
Osteoarthritis, Who gets osteoarthritis? – Australian Institute of Health and Welfare. (2018). Australian Institute of Health and Welfare. Retrieved 18 April 2018. 

Bend + Mend

Bend + Mend has been providing Sydney’s CBD with Physiotherapy and Pilates services since 2003. We have 4 great locations in Martin Place, Barangaroo, Darling Park and Circular Quay, all with private rooms and specialised one-on-one care. We also have Sydney CBD’s best-loved Physios who have helped over 10,000 people recover from pain and injury.

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