Overuse injuries correlated to hours of training

NewsBot · Sep 13, 2008

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Acute and overuse injuries correlated to hours of training in master running athletes.
Knobloch K, Yoon U, Vogt PM.
Foot Ankle Int. 2008 Jul;29(7):671-6.

BACKGROUND: The goal of the study was to determine the rate of running-associated tendinopathy in light of the amount of time training and other risk factors.

MATERIALS AND METHODS: 291 elite runners (average age 42 +/- 9 years) who ran an average of 65.2 +/- 28.3 km/week were included with an overall distance of 9,980,852 km (34,416 km/athlete). Descriptive statistics with Chi2-Test, Fisher-Exact-Test and Mann-Whitney-Test were used to calculate relative risks (RR).

RESULTS: The overall injury rate was 0.08/1000 km (2.93/athlete). Overuse injuries (0.07/1000 km) were more frequent than acute injuries (0.01/1000 km). Achilles tendinopathy was the predominant injury (0.02/1000 km) followed by anterior knee pain (0.01/1000 km), and shin splints (0.01/1000 km). Achilles tendon rupture was rarely encountered (0.001/1000 km). At some time, 56.6% of the athletes had an Achilles tendon overuse injury, 46.4% anterior knee pain, 35.7% shin splints, and 12.7% had plantar fasciitis. Mid-portion Achilles tendinopathy was more common (0.01/1000 km) than insertional (0.005/1000 km). An asphalt running surface decreased mid-portion tendinopathy risk (RR 0.47, p = 0.02). In contrast, sand increased the relative risk for mid-portion Achilles tendinopathy tenfold (RR 10, CI 1.12 to 92.8, p = 0.01). Runners with more than 10 years experience had an increased risk (RR 1.6, p = 0.04) for Achilles tendinopathy.

CONCLUSION: Achilles tendinopathy is the most common running-associated tendinopathy followed by runner's knee and shin splints.
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DaVinci · Sep 13, 2008

The title of this article was:

NewsBot said: ↑

Acute and overuse injuries correlated to hours of training in master running athletes.
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Yet in the abstract, there is nothing on the 'title' (ie the correlation of hours of training:

RESULTS: The overall injury rate was 0.08/1000 km (2.93/athlete). Overuse injuries (0.07/1000 km) were more frequent than acute injuries (0.01/1000 km). Achilles tendinopathy was the predominant injury (0.02/1000 km) followed by anterior knee pain (0.01/1000 km), and shin splints (0.01/1000 km). Achilles tendon rupture was rarely encountered (0.001/1000 km). At some time, 56.6% of the athletes had an Achilles tendon overuse injury, 46.4% anterior knee pain, 35.7% shin splints, and 12.7% had plantar fasciitis. Mid-portion Achilles tendinopathy was more common (0.01/1000 km) than insertional (0.005/1000 km). An asphalt running surface decreased mid-portion tendinopathy risk (RR 0.47, p = 0.02). In contrast, sand increased the relative risk for mid-portion Achilles tendinopathy tenfold (RR 10, CI 1.12 to 92.8, p = 0.01). Runners with more than 10 years experience had an increased risk (RR 1.6, p = 0.04) for Achilles tendinopathy.
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:confused::confused::confused: What was the author and journal editors thinking?

Admin2 · Sep 13, 2008

Related threads:
Does "too much too soon" really cause injury
Other achilles tendon threads
Other overuse injury threads

Craig Payne · Sep 13, 2008

I have not had a chance to read the full paper yet, but Davinci's observation of the abstract appears correct. The editor must have been asleep on the job to let this slip through (the reviewers ahould also have been on it as well).

Of course injury is related to the volume of training. We all know that. BUT, there is not a lot of data to support that, so I was eager to get this publication when I came across the title - it could have been a nice piece of work to quote when talking about the subject .... but from the abstract it does not appear to be on the subject!

NewsBot · Mar 11, 2014

IMPACT OF TRAINING CHARACTERISTICS ON RUNNING-RELATED INJURIES IN RECREATIONAL RUNNERS
L Malisoux, A Urhausen, D Theisen
Br J Sports Med 2014;48:631-632 doi:10.1136/bjsports-2014-093494.194 (Abstracts from the IOC World Conference on Prevention of Injury & Illness in Sport, Monaco 2014)

Background: Most running-related injuries (RRI) are attributed to training errors.
Objective: This study investigated which running training characteristics are potential risk factors for RRI.
Design: Prospective cohort study.
Setting: Recreational distance runners.
Participants: A total of 267 participants accepted to upload weekly all information about running training characteristics, other sport participation and injuries on a dedicated internet platform.
Risk factor assessment: This 9-month follow-up investigated if the risk for RRI was influenced by some of the following running training characteristics: weekly volume (hours/week), weekly frequency (session/week), self-reported session intensity (CR10-Borg Scale), week-to-week absolute change in distance (km/week) and the concomitant use of different pairs of shoes (parallel use of a minimum of 2 different pairs of running shoes).
Main outcome measurements: The primary outcome measure was total volume (hours) of running training and competitions (exposure) until the first RRI (Cox regression analyses). A RRI was defined as any physical complaint located at the lower limbs or lower back region, sustained during or as a result of running practice and impeding planned running activity for at least 1 day.
Results: Overall, 89 participants (33%) recorded an RRI. The total incidence was 6.05 injuries per 1000h of exposure. The adjusted Cox regression analysis revealed that participants who practiced more than 2 hours/week were at a lower risk of RRI (Hazard ratio (HR): 0.539; 95% Confident interval (CI): 0.295-0.986) even when controlling for running experience and training regularity during the previous 12 months. The parallel use of more than one pair of running shoes (HR=0.600; 95% CI=0.369–0.975) and the week-to-week absolute change in distance (HR: 0.882; 68% CI: 0.836–0.931) were also protective factors, while previous injury was a risk factor (HR=1.841; 95% CI=1.185–2.860).
Conclusions: This study identified training characteristics which are related to RRI risk.
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