Yu J, Park D, Lee G. Effect of Eccentric Strengthening on Pain, Muscle Strength, Endurance, and Functional Fitness Factors in Male Patients with Achilles Tendinopathy. Am J Phys Med Rehabil. 2012 Oct 5.

I risultati dello studio confermano che il rinforzo eccentrico è più efficace del rinforzo concentrico nel ridurre il dolore, aumentare la forza e la resistenza e migliorare la funzionalità nei pazienti con tendinopatia achillea. Di conseguenza, l’esecuzione costante di esercizi eccentrici è importante nel setting clinico.
I meccanismi responsabili della diminuzione del dolore determinata dall’esercizio eccentrico non possono essere comunque spiegati con certezza.
Abstract
Objective: The aim of this study was to investigate the effect of eccentric strengthening on pain, muscle strength, endurance, and functional fitness factors in Achilles tendinopathy patients.
Design: Thirty-two male patients with Achilles tendinopathy were assigned to either the experimental group that performed eccentric strengthening or the control group that performed concentric strengthening (n = 16, both groups) for 8 wks (50 mins per day, three times per week). A visual analog scale, an isokinetic muscle testing equipment, the side-step test, and the Sargent jump test were used to assess pain, muscle strength, endurance, and functional fitness factors before and after the intervention.
Results: In comparison with the control group, the experimental group showed significant improvement in pain, ankle dorsiflexion endurance, total balance index, and agility after the intervention. However, there was no significant difference in dexterity between the two groups.
Conclusions: Eccentric strengthening was more effective than concentric strengthening in reducing pain and improving function in patients with Achilles tendinopathy; therefore, regular eccentric strengthening is important for patients in a clinical setting.

3 commenti

  • Samuele Passigli Reply

    Studio interessante, con ottimi spunti di riflessione per migliorare il decision making in soggetti con tendinopatia achillea, con l’obiettivo di indagare l’influenza della posizione del calcagno sul piano frontale sulla distribuzione di forze a livello del tendine:
    Lersch C, Grötsch A, Segesser B, Koebke J, Brüggemann GP, Potthast W.
    Influence of calcaneus angle and muscle forces on strain distribution in the
    human Achilles tendon. Clin Biomech (Bristol, Avon). 2012 Nov;27(9):955-61. doi:
    10.1016/j.clinbiomech.2012.07.001. Epub 2012 Aug 9. PubMed PMID: 22883073.
    http://www.ncbi.nlm.nih.gov/pubmed/22883073

    • Samuele Passigli Reply

      3 x 15 repetitions twice per day with extended knee, and another 3 x 15 repetitions twice per day with a flexed knee.
      All exercises were 7 days per week. Patients were told to continue to exercise with pain unless it became disabling.
      Patients were allowed to jog during their 12?week rehabilitation so long as it caused only mild discomfort.
      From an upright body position and standing with all body weight on the forefoot and the ankle joint in plantar flexion lifted by the non?injured leg, the calf muscle was loaded eccentrically by having the patient lower the heel with the knee straight and with the knee bent. Once the eccentric loads were performed at body weight without any discomfort, subjects were given a backpack that was successively loaded with weight. In this way their eccentric loading was gradually increased. If very high weights ended up becoming needed then the subject used a weight machine.

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