Increased Patellar Tendon Microcirculation and Reduction of Tendon Stiffness Following Knee Extension Eccentric Exercises
| Autor: | Wen-Shiang Chen, Ying-Tai Wu, Tiffany Ting-Fang Shih, Hsing-Kuo Wang, Nai-Hao Yin, Christer Rolf |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Adult
Male musculoskeletal diseases medicine.medical_specialty Knee Joint medicine.medical_treatment Physical Therapy Sports Therapy and Rehabilitation Knee extension Microcirculation Hemoglobins Young Adult Oxygen Consumption Physical medicine and rehabilitation Patellar Ligament Humans Medicine Eccentric Exercise Reduction (orthopedic surgery) Blood Volume business.industry Stiffness General Medicine musculoskeletal system medicine.disease Patellar tendon Tendon Oxygen medicine.anatomical_structure Tennis Physical therapy medicine.symptom Tendinopathy business |
| Zdroj: | Journal of Orthopaedic & Sports Physical Therapy. 44:304-312 |
| ISSN: | 1938-1344 0190-6011 |
| DOI: | 10.2519/jospt.2014.4872 |
| Popis: | Controlled laboratory study.To measure and compare patellar tendon stiffness and microcirculation in college tennis players and nonathletic students when performing eccentric knee extension exercises that do and do not reduce tendon stiffness.Previous studies suggest that tendon microcirculation response during exercises may vary based on the tendon's plastic properties. Methods The study included 3 groups of college-age male students: tennis players who performed 4 sets of either 40 (n = 12) or 80 (n = 13) repetitions of eccentric knee extension exercise and nonathletic students (n = 14) who performed 4 sets of 40 repetitions. Tendon stiffness was measured before and after exercise completion. Changes in total hemoglobin and oxygen saturation (OSat) were analyzed while performing the 4 sets. Comparisons were made within and between the groups. The level of association between tendon microcirculation and stiffness reduction was assessed.The 2 groups (player/4 × 80 and student/4 × 40) exhibiting patellar tendon stiffness reductions (P.008) showed higher total hemoglobin and OSat levels, above the pre-exercise levels, in the fourth set compared to the first set of exercises (P.004). The tennis players who performed 4 sets of 40 repetitions exhibited higher OSat levels in the fourth set than in the first set (P = .004) but had no reduction in tendon stiffness. Changes in OSat levels in the fourth set were correlated with patellar tendon stiffness reductions (r = -0.381, P = .02).We conclude that there was increased patellar tendon microcirculation after performing knee extension eccentric exercises that resulted in a reduction in tendon stiffness. |
| Databáze: | OpenAIRE |
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