Prevalense

Approximate 50% of individuals diagnosed with a ligament and/or meniscal injuries will have osteoarthritis (OA) 10-20 years later with pain and functional impairment (Lohmander, 2007)

Risberg et al., 2016. found the prevalence of radiographic TibiaFemoral and PatellaFemoral OA was 42% and 21%, respectively 20 years after ACL reconstruction.

Running does not cause OA

In addition, Alentorn-Geli et al. 2017, concluded that recreational runners had a lower occurrence of OA compared with competitive runners and controls. These results indicated that a more sedentary lifestyle or long exposure to high-volume and/or high-intensity running are both associated with hip and/or knee OA. However, it was not possible to determine whether these associations were causative or confounded by other risk factors, such as previous injuries, training volume or if they just push through an injury.

This is supported by Chakravarty et al. who followed 45 runners from 1984 to 2002 and by the end of the study, runners did not have more prevalent OA (20% runners vs 32%, controls) nor more cases of severe OA (2.2% vs 9.4%) and they concluded that Long-distance running among healthy older individuals was not associated with accelerated radiographic OA.

Risk factors 

Skærmbillede 2018-07-07 kl. 07.47.36Excessive abnormal knee joint loading:

The knee adduction moment (KAM) is frequently used as a proxy measure for the amount of loading in the medial knee compartment and the medial knee compartment is most commonly in OA (Miyazaki 2002)

Theoretical, if the ground reaction force (GRF) moves closer to the joint center the KAM decrease the loading on the medial knee compartment and will slow down the progression of OA.

 

What exercise works for OA.

In conclusion more move, sit less

Pain

  • Pain does not equal tissue damage. Pain is allowed as long it remains tolerable 2-5/10 (agerberg 2010) and if the pain increase after exercise it should subside with 24hours

Weight loss

  • 10% weight loss through diet and exercise = 50% reduction in knee pain from OA (Messier et al 2013)
  • Weight loss on 5-10% over 48month shown significant lower cartilage degeneration as assessed with MRI. (Gersing, 2017

     

 

#Osteoarthritis #atrose #training #træning