Progression in Running Intensity or Running Volume and the Development of Specific Injuries in Recreational Runners: Run Clever, a Randomized Trial Using Competing Risks

Daniel Ramskov, Sten Rasmussen, Henrik Sørensen, Erik Parner, Martin Lind, Rasmus Østergaard Nielsen

Publikation: Bidrag til tidsskriftTidsskriftsartikelForskningpeer review



It has been proposed that training intensity and training volume are associated with specific running-related injuries. If such an association exists, secondary preventive measures could be initiated by clinicians, based on symptoms of a specific injury diagnosis.

To test the following hypotheses: (1) a running schedule focusing on running intensity (S-I) would increase the risk of sustaining Achilles tendinopathy, gastrocnemius injuries, and plantar fasciitis compared with hypothesized volume-related injuries; and (2) a running schedule focusing on running volume (S-V) would increase the risk of sustaining patellofemoral pain syndrome, iliotibial band syndrome, and patellar tendinopathy compared with hypothesized intensity-related injuries.

In this randomized clinical trial and etiology study, healthy recreational runners were included in a 24-week follow-up, divided into 8-week preconditioning and 16-week specific-focus training periods. Participants were randomized to 1 of 2 running schedules: S-I or S-V. The S-I group progressed the amount of high-intensity running (88% maximal oxygen consumption [VO2max] or greater) each week, and the S-V group progressed total weekly running volume. A global positioning system watch or smartphone collected data on running. Running-related injuries were diagnosed based on a clinical examination. Estimates were reported as risk difference and 95% confidence interval (CI).

Of 447 runners, a total of 80 sustained an injury (S-I, n = 36; S-V, n = 44). Risk differences (95% CIs) of intensity injuries in the S-I group were −0.8% (−5.0%, 3.4%) at 2 weeks, −0.8% (−6.7%, 5.1%) at 4 weeks, −2.0% (−9.2%, 5.2%) at 8 weeks, and −5.1% (−16.5%, 6.3%) at 16 weeks. Risk differences (95% CIs) of volume injuries in the S-V group were −0.9% (−5.0%, 3.2%) at 2 weeks, −2.0% (−7.5%, 3.5%) at 4 weeks, −3.2% (−9.1%, 2.7%) at 8 weeks, and −3.4% (13.2%, 6.2%) at 16 weeks.

No difference in risk of hypothesized intensity- and volume-specific running-related injuries exists between the 2 running schedules focused on progression in either running intensity or volume.
TidsskriftJournal of Orthopaedic and Sports Physical Therapy
Udgave nummer10
Sider (fra-til)740-748
Antal sider9
StatusUdgivet - 2018


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