Effects of 6 Weeks vascular occlusion Low-Intensity Resistance Exercises on Muscle Hypertrophy and Strength

-, - Effects of 6 Weeks vascular occlusion Low-Intensity Resistance Exercises on Muscle Hypertrophy and Strength. In: First International and Third National Conference in Sport Sciences Innovations, 2,3 May 2019, Ardabil, Iran. (Submitted)

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Abstract

Aim The purpose of this study was to examine the acute and chronic effects of low-intensity concentric or eccentric resistance training with blood flow restriction (BFR) on musclehypertrophy and strength. Methods Eight young women performed 30-40% of concentric one repetition maximal dumbbell curl exercise (three sets) 3 days/week for 6 weeks. One arm was randomly chosen for concentric BFR (CON-BFR) exercise only and the other arm performed eccentric BFR (ECC-BFR) exercise only at the same exercise load. Results During the exercise session, EMG for biceps brachii muscles increased progressively during CON-BFR, which was greater (p<0.05) than that of the ECC-BFR. Immediately after the exercise, muscle thickness (MTH) of the elbow flexors acutely increased (p<0.01) with both CON-BFR and ECC-BFR, but was greater with CON-BFR (11.7%) (p<0.01) than ECC-BFR (3.9%) at 10-cm above the elbow joint Following 6-weeks of training, MRI-measured muscle cross-sectional muscle volume (12.5%) of the elbow flexors were increased (p<0.01) with CON-BFR. Increases in muscle CSA and volume were lower in ECC-BFR (5.1%, 0.8% and 2.9%, respectively) than in the CON-BFR and only muscle CSA at 10-cm position increased significantly (p<0.05) after the training. Maximal voluntary isometric strength of elbow flexors was increased (p<0.05) in CON-BFR (8.6%), but not in ECC (3.8%). Conclusion These results suggest that CON-BFR training leads to pronounced acute changes in muscle size, an index of muscle cell swelling, the response to which may be an important factor for promoting muscle hypertrophy with BFR resistance training

Item Type: Conference or Workshop Item (Poster)
Persian Title: -
Persian Abstract: -
Subjects: Divisions > Conferences > First International and Third National Conference in Sport Sciences Innovations - May 2019
Conferences > First International and Third National Conference in Sport Sciences Innovations - May 2019
Divisions: Conferences > First International and Third National Conference in Sport Sciences Innovations - May 2019
Subjects > Conferences > First International and Third National Conference in Sport Sciences Innovations - May 2019
Date Deposited: 18 Jun 2019 07:29
Last Modified: 18 Jun 2019 07:29
URI: http://repository.uma.ac.ir/id/eprint/7411

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