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Several of the individual gains were modest; however, it   therapy. In addition, follow­on evaluations are necessary
              is important to recognize that these patients still had ob­  to determine if the successful results obtained in this se­
              jective improvements with BFR training despite chronic   ries persist in the long term. If this training method ben­
              muscle weakness that was resistant to prior standard re­  efits chronic muscle weakness patients, it offers a new
              habilitation techniques. These strength gains are impor­  therapy to improve the functionality, and thus the inde­
              tant to improve patient functional outcomes.       pendence and lives of our wounded Servicemembers and
                                                                 others with chronic muscle weakness.
              This series demonstrated that BFR training is not only
              effective but also a safe method of improving strength in
              healthy, active individuals, which has been demonstrated   Conclusion
              in prior studies. 2,16,17,19,31–33  No patients in this series expe­  This case series demonstrated that BFR training at low
              rienced any complications associated with the BFR train­  loads is an effective tool when used as part of a reha­
              ing, and all patients were able to complete the 2 weeks   bilitation program in individuals with chronic thigh
              of training. The patients in this case series achieved   weakness.
              strength gains while training with weight that is at 20%
              of their 1RM. This is a much lighter load than what is
              recommended by the ACSM weight­training guidelines   Disclaimers
              for standard resistance training. The lower load training   The view(s) expressed herein are those of the author(s)
              may be beneficial for patients who are unable to toler­  and do not reflect the official policy or position of
              ate heavier loads due to various reasons such as restric­  Brooke Army Medical Center, the US Army Medical De­
              tions in the early postoperative period. Contrary to BFR   partment, the US Army Office of the Surgeon General,
              training, traditional strength­training required loads up   the Department of the Army, Department of Defense, or
              to 80% of the 1RM to affect muscle strength. 10
                                                                 the US government.
              Clinically, the applications for BFR training have con­
              tinued to expand. The majority of studies evaluating   Disclosures
              BFR training have been performed on normal, healthy,   The authors have indicated they have no financial rela­
              active human subjects showing strength improvements   tionships relevant to this article to disclose.
              in individuals both new to a strengthening program  and
                                                         5
              when expanding on a previous intense resistance exer­
              cise regimen. One example of the latter is a study by   References
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