Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat
PURPOSE This study aimed to investigate whether endurance and resistance training sequences and circadian rhythms affect muscle hypertrophy and mitochondrial biogenesis-related molecules in obese rats. METHODS Rats were randomly divided into five groups: the obesity control group (OCG), aerobic-resi...
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| Format: | Article |
| Language: | Korean |
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The Korean Society of Exercise Physiology
2023-08-01
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| Series: | 운동과학 |
| Subjects: | |
| Online Access: | http://www.ksep-es.org/upload/pdf/ksep-2023-00367.pdf |
| _version_ | 1797653520922443776 |
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| author | Yeong-Hyun Cho Ji-Young Lee Tae-Beom Seo |
| author_facet | Yeong-Hyun Cho Ji-Young Lee Tae-Beom Seo |
| author_sort | Yeong-Hyun Cho |
| collection | DOAJ |
| description | PURPOSE This study aimed to investigate whether endurance and resistance training sequences and circadian rhythms affect muscle hypertrophy and mitochondrial biogenesis-related molecules in obese rats. METHODS Rats were randomly divided into five groups: the obesity control group (OCG), aerobic-resistance exercise in the morning group (ARMG), resistance-aerobic exercise in the morning group (RAMG), aerobic resistance exercise in the evening group (AREG), and resistance-aerobic exercise in the evening group (RAEG). The exercise groups performed endurance and resistance exercises for 8 weeks according to their circadian rhythms and exercise sequences. RESULTS We evaluated specific muscle hypertrophy and mitochondrial biogenesis markers in the flexor pollicis longus and soleus muscles using western blot and immunofluorescence techniques. The body weight was significantly decreased in the ARMG, RAMG, AREG, RAEG compared to the OCG after intervention. The soleus muscle fiber cross-sectional area and muscle hypertrophy markers p-Akt and p-mTOR were significantly increased in the AREG group compared with those in the OCG, ARMG, RAMG, and RAEG groups after exercise intervention. Most mitochondrial biogenesis-related markers were significantly increased in the RAMG group than in the other groups after exercise intervention. CONCLUSION Our findings provide new evidence that muscle hypertrophy might be upregulated by resistance exercise after evening endurance exercise. In addition, morning resistance exercise followed by aerobic exercise, might promote mitochondrial biogenesis. |
| first_indexed | 2024-03-11T16:45:46Z |
| format | Article |
| id | doaj.art-ea4e48d48a404a74b6130d74eddc4e2a |
| institution | Directory Open Access Journal |
| issn | 1226-1726 2384-0544 |
| language | Korean |
| last_indexed | 2024-03-11T16:45:46Z |
| publishDate | 2023-08-01 |
| publisher | The Korean Society of Exercise Physiology |
| record_format | Article |
| series | 운동과학 |
| spelling | doaj.art-ea4e48d48a404a74b6130d74eddc4e2a2023-10-23T01:04:24ZkorThe Korean Society of Exercise Physiology운동과학1226-17262384-05442023-08-0132334735310.15857/ksep.2023.003671054Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese RatYeong-Hyun Cho0Ji-Young Lee1Tae-Beom Seo2Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, KoreaDepartment of Kinesiology, College of Natural Science, Jeju National University, Jeju, KoreaDepartment of Kinesiology, College of Natural Science, Jeju National University, Jeju, KoreaPURPOSE This study aimed to investigate whether endurance and resistance training sequences and circadian rhythms affect muscle hypertrophy and mitochondrial biogenesis-related molecules in obese rats. METHODS Rats were randomly divided into five groups: the obesity control group (OCG), aerobic-resistance exercise in the morning group (ARMG), resistance-aerobic exercise in the morning group (RAMG), aerobic resistance exercise in the evening group (AREG), and resistance-aerobic exercise in the evening group (RAEG). The exercise groups performed endurance and resistance exercises for 8 weeks according to their circadian rhythms and exercise sequences. RESULTS We evaluated specific muscle hypertrophy and mitochondrial biogenesis markers in the flexor pollicis longus and soleus muscles using western blot and immunofluorescence techniques. The body weight was significantly decreased in the ARMG, RAMG, AREG, RAEG compared to the OCG after intervention. The soleus muscle fiber cross-sectional area and muscle hypertrophy markers p-Akt and p-mTOR were significantly increased in the AREG group compared with those in the OCG, ARMG, RAMG, and RAEG groups after exercise intervention. Most mitochondrial biogenesis-related markers were significantly increased in the RAMG group than in the other groups after exercise intervention. CONCLUSION Our findings provide new evidence that muscle hypertrophy might be upregulated by resistance exercise after evening endurance exercise. In addition, morning resistance exercise followed by aerobic exercise, might promote mitochondrial biogenesis.http://www.ksep-es.org/upload/pdf/ksep-2023-00367.pdfcircadian rhythmsexercise sequencemuscle hypertrophymitochondrial biogenesisinterference effect |
| spellingShingle | Yeong-Hyun Cho Ji-Young Lee Tae-Beom Seo Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat 운동과학 circadian rhythms exercise sequence muscle hypertrophy mitochondrial biogenesis interference effect |
| title | Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat |
| title_full | Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat |
| title_fullStr | Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat |
| title_full_unstemmed | Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat |
| title_short | Effects of Exercise Sequence and Circadian Rhythms on Molecular Mechanisms of Muscle Hypertrophy and Mitochondrial Biogenesis in Obese Rat |
| title_sort | effects of exercise sequence and circadian rhythms on molecular mechanisms of muscle hypertrophy and mitochondrial biogenesis in obese rat |
| topic | circadian rhythms exercise sequence muscle hypertrophy mitochondrial biogenesis interference effect |
| url | http://www.ksep-es.org/upload/pdf/ksep-2023-00367.pdf |
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