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Effects of high-intensity blood flow restriction exercise on muscle fatigue.

Neto GR, Santos HH, Sousa JB, Júnior AT, Araújo JP, Aniceto RR, Sousa MS - J Hum Kinet (2014)

Bottom Line: Strength training combined with blood flow restriction (BFR) have been used to improve the levels of muscle adaptation.The average frequency showed significant reductions in the WFR group for the vastus lateralis and vastus medialis muscles, and intergroup only for the vastus medialis.In conclusion, a set of squats at high intensity with BFR could compromise muscle strength immediately after exercise, however, differences were not significant between groups.

View Article: PubMed Central - PubMed

Affiliation: Kinanthropometry and Human Development Laboratory - LABOCINE -UFPB, João Pessoa / PB, Brazil. ; Federal University of Rio de Janeiro. Physical Education - Graduate Program. Rio de Janeiro, RJ - Brazil.

ABSTRACT
Strength training combined with blood flow restriction (BFR) have been used to improve the levels of muscle adaptation. The aim of this paper was to investigate the acute effect of high intensity squats with and without blood flow restriction on muscular fatigue levels. Twelve athletes (aged 25.95 ± 0.84 years) were randomized into two groups: without Blood Flow Restriction (NFR, n = 6) and With Blood Flow Restriction (WFR, n = 6) that performed a series of free weight squats with 80% 1-RM until concentric failure. The strength of the quadriceps extensors was assessed in a maximum voluntary isometric contraction integrated to signals from the surface electromyogram. The average frequency showed significant reductions in the WFR group for the vastus lateralis and vastus medialis muscles, and intergroup only for the vastus medialis. In conclusion, a set of squats at high intensity with BFR could compromise muscle strength immediately after exercise, however, differences were not significant between groups.

No MeSH data available.


Related in: MedlinePlus

Percentage changes in maximum isometric torque (pre × post-exercise) for WFR and NFR groups NFR = without Blood Flow Restriction; WFR = With Blood Flow Restriction Average values and standard error
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f1-jhk-41-163: Percentage changes in maximum isometric torque (pre × post-exercise) for WFR and NFR groups NFR = without Blood Flow Restriction; WFR = With Blood Flow Restriction Average values and standard error

Mentions: Isometric torque values were significantly reduced during a MVIC immediately after exercise when compared to the pre-exercise condition (Table 1), both for NFR (p = 0.001) and WFR (p = 0.014) groups. It was found in the intergroup analysis (Figure 1), that negative percentage changes that occurred in isometric torque as a result of the series of exercise were similar in NFR and WFR (p > 0.05).


Effects of high-intensity blood flow restriction exercise on muscle fatigue.

Neto GR, Santos HH, Sousa JB, Júnior AT, Araújo JP, Aniceto RR, Sousa MS - J Hum Kinet (2014)

Percentage changes in maximum isometric torque (pre × post-exercise) for WFR and NFR groups NFR = without Blood Flow Restriction; WFR = With Blood Flow Restriction Average values and standard error
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4120450&req=5

f1-jhk-41-163: Percentage changes in maximum isometric torque (pre × post-exercise) for WFR and NFR groups NFR = without Blood Flow Restriction; WFR = With Blood Flow Restriction Average values and standard error
Mentions: Isometric torque values were significantly reduced during a MVIC immediately after exercise when compared to the pre-exercise condition (Table 1), both for NFR (p = 0.001) and WFR (p = 0.014) groups. It was found in the intergroup analysis (Figure 1), that negative percentage changes that occurred in isometric torque as a result of the series of exercise were similar in NFR and WFR (p > 0.05).

Bottom Line: Strength training combined with blood flow restriction (BFR) have been used to improve the levels of muscle adaptation.The average frequency showed significant reductions in the WFR group for the vastus lateralis and vastus medialis muscles, and intergroup only for the vastus medialis.In conclusion, a set of squats at high intensity with BFR could compromise muscle strength immediately after exercise, however, differences were not significant between groups.

View Article: PubMed Central - PubMed

Affiliation: Kinanthropometry and Human Development Laboratory - LABOCINE -UFPB, João Pessoa / PB, Brazil. ; Federal University of Rio de Janeiro. Physical Education - Graduate Program. Rio de Janeiro, RJ - Brazil.

ABSTRACT
Strength training combined with blood flow restriction (BFR) have been used to improve the levels of muscle adaptation. The aim of this paper was to investigate the acute effect of high intensity squats with and without blood flow restriction on muscular fatigue levels. Twelve athletes (aged 25.95 ± 0.84 years) were randomized into two groups: without Blood Flow Restriction (NFR, n = 6) and With Blood Flow Restriction (WFR, n = 6) that performed a series of free weight squats with 80% 1-RM until concentric failure. The strength of the quadriceps extensors was assessed in a maximum voluntary isometric contraction integrated to signals from the surface electromyogram. The average frequency showed significant reductions in the WFR group for the vastus lateralis and vastus medialis muscles, and intergroup only for the vastus medialis. In conclusion, a set of squats at high intensity with BFR could compromise muscle strength immediately after exercise, however, differences were not significant between groups.

No MeSH data available.


Related in: MedlinePlus