COMPARISON OF CLINICAL FATIGUE PROTOCOLS TO DECREASE SINGLE-LEG FORWARD HOP PERFORMANCE IN HEALTHY INDIVIDUALS
| Autor: | Dimitrios Katsavelis, Jennifer J. Bagwell, Brooke Farmer, Terry L. Grindstaff, Chelsea J. Klemetson, Allison K. White |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
education.field_of_study
medicine.medical_specialty Rehabilitation Anterior cruciate ligament reconstruction business.industry medicine.medical_treatment Healthy population Population Return to activity 030229 sport sciences Test (assessment) Hop (networking) 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Healthy individuals medicine education business 030217 neurology & neurosurgery |
| Zdroj: | International Journal of Sports Physical Therapy. 13:143-151 |
| ISSN: | 2159-2896 |
| Popis: | Background Return to activity decisions after anterior cruciate ligament reconstruction (ACL-R) are limited by functional performance tests often performed in a non-fatigued state. Fatigue can improve test sensitivity, but current methods to induce fatigue are typically bilateral tasks or focus on the quadriceps muscle in isolation. Hypothesis/Purpose To determine the effects of a two-minute lateral step-down fatigue test compared to a 30-second side-hop test on single-leg forward hop distance in healthy individuals. It was hypothesized that participants would demonstrate decreased hop distance with both tests, but the two-minute lateral step-down fatigue test would result in greater deficits in single-leg forward hop distance. Study Design Randomized crossover. Methods Twenty healthy participants (16 females, 4 males; age = 23.7±3.0 years, height = 153.8±36.2 cm; mass = 64.4±12.8 kg; Tegner = 6.8±1.2) were asked to perform single-leg forward hop for distance pre- and post-fatigue. Participants were randomly assigned to one of the two fatigue tests, 30-second side-hop or 2-minute lateral step-down test, during the first visit. They returned within a week and performed the same sequence of tests but underwent whichever fatigue test was not assigned at the prior visit. Results There was a significant decrease (p < 0.001) in single-leg forward hop distance following the 30-second side-hop test (pre = 134.1±23.7 cm, post = 126.2±24.4 cm) and the two-minute lateral step-down test (pre = 135.0±26.1 cm, post = 122.7±27.4 cm). The decrease in hop distance was significantly greater (p < 0.001) for the two-minute lateral step-down test compared to the 30-second side-hop test. Conclusion The two-minute lateral step-down test resulted in a greater decrease in hop performance compared to the 30-second side-hop test. The results establish a threshold for expected changes that occur in a healthy population and that can then be compared with an injured athlete population. The two-minute lateral step-down exercise may be an effective method of inducing fatigue to better mimic performance in a sports environment to inform return-to-sport decisions. Level of Evidence Level 1b- Therapy. |
| Databáze: | OpenAIRE |
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