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Effectiveness of blood flow restriction combined with low load resistance training on quadriceps muscle after knee conditions : systematic review
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Aoun_Elie_56511700Dawe-Coz_Alexander_33981700_2017-2018.pdf
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- Purpose/Background: Quadriceps strengthening is considered as a major key in rehabilitation and in preventive protocol for knee conditions. Blood flow restriction (BFR) is based on brief periods of vascular occlusion which improve muscle strength and increase hypertrophy. The purpose of this review was to show the ef-fectiveness of BFR combined with low-load (LL) resistance training on quadriceps muscle after knee injuries when compared to the conventional protocol using 30% or 70% of one repetition maximum (1RM). Methods: A systematic review was realized to identify relevant studies through the databases PubMed, PEJI0Dro, and ScienceDirect from the earliest record up to March 2017. Data including study selection, clinical population characteristics, and rehabilitation protocol and outcome measures were extracted. Study quality and re-porting was evaluated using the Physiotherapy Evidence Database (PEDro) scale. Results: Six studies were included. Concerning knee extensor strength, two studies detected a significant improvements comparing to the conventional group using 30% of 1RM. According to muscle thickness, no studies showed a significant changes except for one study. Regarding the outcomes measures related to both knee pain and functional capacities, three studies presented improvements compar-ing to the control group. Conclusion: Compared to the conventional protocol using 30% of 1RM, LL-BFR showed the same or some improvements in muscle thickness, muscle strength, knee pain and knee function. LL-BFR protocol is considered as a safety alternative for heavy load resistance training for knee conditions in early rehabilitation.