There is no denying that knee pain is common amongst runners. Issues such as patellar tendinopathy, patellafemoral pain as well as iliotibial band syndrome are possibly the most common complaints. Quite often, during rehab from such injuries, runners are advised to run at a slower speed with the aim of reducing load placed on the knee joint during each stride. However, a recent study has shown that slow-speed running actually increases the cumulative load on the knee over the duration of a run.
A recent study collected kinematic and ground reaction force data from 16 recreational runners, during steady-state running with a rear-foot strike pattern at 3 different speeds.
Based on a 1000-m running distance, the cumulative load at the knee was significantly higher at a slow running speed than at a high running speed (relative difference, 80%).
The study concluded that slow-speed running decreases knee joint loads per stride and increases the cumulative load at the knee joint for a given running distance compared to faster running.
The primary reason for the increase in cumulative load at slower speeds is an increase in number of strides needed to cover the same distance.
Results from this study can be applied to your own rehab and your return to running training program.
For the full summary published on Pubmed - click here
From: Petersen et al., J Orthop Sports Phys Ther (2015) (Epub ahead of print). All rights reserved to Journal of Orthopaedic & Sports Physical Therapy.
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Matt Healey
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