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Research article
Tsukasa Tanaka
Juntendo University - Sakura Campus: Juntendo Daigaku - Sakura Campus
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9751-4929
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This work is licensed under a CC BY 4.0 License. Read Full License
Background: The present study investigated the effects of different timings of BFR during HIT on muscle hypertrophy, muscle strength, and pain during exercise.
Methods: The study included 14 limbs from seven heathy males. Participants were divided into three groups: BFR during exercise (EX); BFR during rest (RE), and training only (CON). Participants performed elbow flexion exercises by BIODEX, two days / week for eight weeks. BFR was set at 120 mmHg pressure. Elbow flexor peak torque, and muscle cross-sectional area were measured, before and after the training period. The pain during exercise were measured during training.
Results: The peak torque was significantly increased the RE and CON (p < 0.05), but no increase was observed in the EX. Exercise repetitions the RE (set 1, 26.5 ± 8.7 reps; set 2, 15.2 ± 8.0 reps; set 3, 13.1 ± 4.7 reps; set 4, 13.8 ± 6.3 reps) decreased two sets earlier than the CON (set 1, 28.0 ± 8.6 reps; set 2, 25.6 ± 7.5 reps; set 3, 24.4 ± 8.2 reps; and set 4, 23.8 ± 7.2 reps) (p < 0.01). The numerical rating scale was higher in the EX during exercise and in the RE during rest compared with the CON. However, the RE did not show exacerbated pain during exercise (p < 0.01).
Conclusions: This present study showed that BFR during rest can lead to muscle hypertrophy and muscle strength with fewer exercise repetitions than training only. BFR during rest showed the greatest decreases in peak torque during exercise and did not exacerbate pain during exercise.
Keywords
vascular occlusion, resistance training, resistance exercise, BIODEX, muscle pain
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This preprint is under consideration at BMC Sports Science, Medicine and Rehabilitation. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Tsukasa Tanaka
Juntendo University - Sakura Campus: Juntendo Daigaku - Sakura Campus
Corresponding Author
ORCiD: https://orcid.org/0000-0001-9751-4929
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 13 May, 2021
No community comments so far
Editor assigned
On 09 May, 2021
Submission checks complete
On 09 May, 2021
Editor invited
On 09 May, 2021
First submitted
On 01 May, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background: The present study investigated the effects of different timings of BFR during HIT on muscle hypertrophy, muscle strength, and pain during exercise.
Methods: The study included 14 limbs from seven heathy males. Participants were divided into three groups: BFR during exercise (EX); BFR during rest (RE), and training only (CON). Participants performed elbow flexion exercises by BIODEX, two days / week for eight weeks. BFR was set at 120 mmHg pressure. Elbow flexor peak torque, and muscle cross-sectional area were measured, before and after the training period. The pain during exercise were measured during training.
Results: The peak torque was significantly increased the RE and CON (p < 0.05), but no increase was observed in the EX. Exercise repetitions the RE (set 1, 26.5 ± 8.7 reps; set 2, 15.2 ± 8.0 reps; set 3, 13.1 ± 4.7 reps; set 4, 13.8 ± 6.3 reps) decreased two sets earlier than the CON (set 1, 28.0 ± 8.6 reps; set 2, 25.6 ± 7.5 reps; set 3, 24.4 ± 8.2 reps; and set 4, 23.8 ± 7.2 reps) (p < 0.01). The numerical rating scale was higher in the EX during exercise and in the RE during rest compared with the CON. However, the RE did not show exacerbated pain during exercise (p < 0.01).
Conclusions: This present study showed that BFR during rest can lead to muscle hypertrophy and muscle strength with fewer exercise repetitions than training only. BFR during rest showed the greatest decreases in peak torque during exercise and did not exacerbate pain during exercise.
Figure 1
Figure 2
Figure 3
This is a list of supplementary files associated with this preprint. Click to download.
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