Abstract
The current study aims to compare the mechanical propensities between healthy runners and runners with hamstring injuries. Retrospective case-control video analysis was used. A total of 35 (12 male and 23 female) videos of runners with hamstring injuries were compared with videos of sex-, age-, mass-, and height-matched healthy control runners. The main outcome variables were trunk posture angles, overstride angles, and foot strike patterns. An independent t-test and chi-squared tests were employed to analyze the main outcome variables between the runners with hamstring injuries and the healthy control runners. The statistical significance of less than 0.05 (p < 0.05) was used. The runners with hamstring injuries had a 1.6° less forward-trunk posture angles compared with the healthy control runners (p = 0.043). Also, the runners with hamstring injuries demonstrated a 4.9° greater overstride angles compared with the healthy control runners (p = 0.001). Finally, the runners with hamstring injuries had a tendency of rearfoot strike, while the healthy control runners showed a forefoot strike pattern (p = 0.004). In conclusion, the runners with hamstring injuries demonstrated different running mechanical propensities compared with the healthy runners.
Highlights
Running can generate numerous health benefits, including an enhancement in aerobic fitness, metabolic function, and postural balance [1]
The aim of the current study was to identify running mechanical propensity differences, including the trunk, lower leg/shin, and foot positions, in runners with hamstring injuries compared with healthy runners
The runners with hamstring injuries had 1.6◦ less forward trunk posture angles compared with the healthy control runners (p = 0.043; Table 2)
Summary
Running can generate numerous health benefits, including an enhancement in aerobic fitness, metabolic function, and postural balance [1]. As with every sporting activity, running entails a risk of sustaining a musculoskeletal pathology. According to an investigation performed by Taunton et al, hamstring injuries are one of the most common running-related pathologies [2]. Hamstring musculatures consist of semitendinosus, semimembranosus, and biceps femoris [3], and are known to have a high likelihood of recurrence [4,5,6]. A previous review article considered inadequate warm-up, excessive fatigue, lack of flexibility, agonist/antagonist imbalance, age, lower-back pain, sacroiliac-joint dysfunction, and chronic hormone imbalance as possible contributing factors for recurrent hamstring injuries [7]. A few studies have been performed in order to determine the risk factors of hamstring injuries [7,12,13,14,15].
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