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Biomedical subjects

J Wiklander

Publications and source records attributed to J Wiklander.

2 recordsLinked to original sources
PubMed1987

Simple tests for surveying muscle strength and muscle stiffness in sportsmen.

Thirty-nine elite runners were examined by Cybex II for thigh muscle strength. In addition, the maximal abduction, flexion and extension in the hip, dorsal flexion in the ankle, standing five steps, long and vertical jump, and side and front split were measured. For the latter five tests, an ordinary measuring tape was used. To establish reference values, 111 district level runners and 24 keep-fit joggers were examined by the three jump tests and the side and front split. Twenty randomly selected runners were examined twice to determine the reproducibility. The mean CV% was 1.9 +/- 1.4. There was a statistically significant correlation between the results in the vertical jump, the standing five steps, and long jump and muscle strength (P less than 0.001), in particular as to the values in the higher angle velocity. Furthermore, there was a correlation (P less than 0.001) between the results in side and front split and the hip. There was a covariation between the three ranges of motion, suggesting that stiffness in the hip was a general condition involving all directions of movements. The sensitivity for the jump tests and the side/front splits was 75%-91%. The specificity for the same test varied between 70% and 100%.

Adult↗
PubMedDate not supplied

Injuries in runners.

Sixty runners belonging to two clubs were followed for 1 year with regard to training and injury. There were 55 injuries in 39 athletes. The injury rate per 1,000 hours of training was 2.5 in long-distance/marathon runners and 5.6 to 5.8 in sprinters and middle-distance runners. There were significant differences in the injury rate in different periods of the 12 month study, the highest rates occurring in spring and summer. In marathon runners there was a significant correlation between the injury rate during any 1 month and the distance covered during the preceding month (r = 0.59). In a retrospective analysis of the cause of injury, a training error alone or in combination with other factors was the most common injury-provoking factor (72%). The injury pattern varied among the three groups of runners: hamstring strain and tendinitis were most common in sprinters, backache and hip problems were most common in middle-distance runners, and foot problems were most common in marathon runners.

Adolescent↗