Resistance training with interval blood flow restriction effectively enhances intramuscular metabolic stress with less ischemic duration and discomfort
| العنوان: | Resistance training with interval blood flow restriction effectively enhances intramuscular metabolic stress with less ischemic duration and discomfort |
|---|---|
| المؤلفون: | Koichi Okita, Noriteru Morita, Kagami Hirabayashi, Takashi Yokota, Shingo Takada, Masashige Takahashi, Shintaro Kinugawa |
| المصدر: | Applied Physiology, Nutrition, and Metabolism. 44:759-764 |
| بيانات النشر: | Canadian Science Publishing, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Male, medicine.medical_specialty, Magnetic Resonance Spectroscopy, Muscle size, Phosphocreatine, Physiology, Endocrinology, Diabetes and Metabolism, Blood Pressure, 030204 cardiovascular system & hematology, Blood flow restriction, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Ischemia, Stress, Physiological, Physiology (medical), Internal medicine, medicine, Humans, Metabolic Stress, Muscle, Skeletal, Nutrition and Dietetics, business.industry, Muscle adaptation, Resistance training, Resistance Training, 030229 sport sciences, General Medicine, Hydrogen-Ion Concentration, High resistance, Regional Blood Flow, Duration (music), Cardiology, Interval (graph theory), business |
| الوصف: | Increases in muscle size and strength similar to those obtained with high resistance load can be achieved by combining lower loads with continuous blood flow restriction (BFR). However, high ratings for distress have been reported for continuous BFR. Therefore, we investigated the efficacy (metabolic stress) of BFR applied only during intervals in resistance exercise. Seven healthy men performed three 1-min sets of plantar flexion (30 reps/min) with 1-min rest intervals under 4 conditions: low-load resistance exercise (L, 20% 1-repetition maximum (1RM)) without BFR (L-noBFR), L with BFR during exercise sets (L-exBFR), L with BFR during rest intervals (L-intBFR), and L with continuous BFR during both exercise and rest intervals (L-conBFR). Based on the results of the first experiment, we performed additional protocols using a moderate load (M, 40% 1RM) with intermittent (exercise or rest intervals) BFR (M-exBFR and M-intBFR). Intramuscular metabolic stress, defined as decreases in phosphocreatine and intramuscular pH, was evaluated by 31P magnetic resonance spectroscopy. Rated perceived exertion (RPE) was also assessed. At the end of exercise, total decreases in phosphocreatine and intramuscular pH were similar among L-noBFR, L-intBFR, and L-exBFR and significantly less than those in L-conBFR (p < 0.05). In contrast, changes in these variables in M-intBFR but not in M-exBFR were similar to those in L-conBFR. Nevertheless, RPE was lower in M-intBFR than in both M-exBFR and L-conBFR (p < 0.05). The effect of intermittent BFR during exercise might be insufficient to induce metabolic stress when using a low load. However, effective metabolic stress for muscle adaptation could be obtained by moderate-load resistance exercise with BFR during intervals with less ischemic duration and discomfort. |
| تدمد: | 1715-5320 1715-5312 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7af298b56707dbb32f3f5b16f8ecbe84 https://doi.org/10.1139/apnm-2018-0321 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....7af298b56707dbb32f3f5b16f8ecbe84 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17155320 17155312 |
|---|