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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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Blood Flow Restriction Rehabilitation for Extremity Weakness 55

