Terena 2018 | Tissue Repair
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Terena SML, Fernandes KPS, Bussadori SK, Brugnera Junior A, de Fátima Teixeira da Silva D, Magalhães EMR, Ferrari RAM. Infrared Laser Improves Collagen Organization in Muscle and Tendon Tissue During the Process of Compensatory Overload. Photomed Laser Surg. 2018 Mar;36(3):130-136.
Animal laboratory study. Methods : 22 Wistar rats were submitted to bilateral partial removal of the synergists - gastrocnemius and soleus - of the plantar muscle, thereby overloading the plantar muscle, and divided in 3 groups: • Control (no hypertrophy, no LLLT) • Hypertrophy program without LLLT • Hypertrophy program + LLLT : 780 nm, 40 mW, 9.6 J/cm2 and 10 s/point, 8 points, total energy 3.2 J, daily
Results : Infrared laser irradiation induces an improvement in collagen organization in tendons, increased space between the muscle fascicles and a reduction in the total area of collagen in muscles during compensatory atrophy following the ablation of synergist muscles, all of which are beneficial to tissue adaptation.
KEY MESSAGE: Better collagen fiber deposition and organization in both muscle and tendon tissue with LLLT during compensatory hypertrophy reflects the better quality in the muscle hypertrophy process that contributes significantly to this tissue in terms of functional performance and protection against recurrence of injury.
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