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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mendham, Amy E. Duffield, Rob Coutts, Aaron J. Marino, Frank E. Boyko, Andriy McAinch, Andrew J. Bishop, David John |
| Description | Author Affiliation: Mendham AE ( University of Cape Town amymendham21@gmail.com.); Duffield R ( University of Technology Sydney.); Coutts AJ ( Carton Football Club, Carlton, AUSTRALIA.); Marino FE ( Charles Sturt University.); Boyko A ( University of Technology Sydney.); McAinch AJ ( Victoria University.); Bishop DJ ( Victoria University.) |
| Abstract | PURPOSE: This study assessed the mitochondrial related signaling responses to a single bout of non-contact, modified football (touch rugby), played as small-sided games (SSG), or cycling (CYC) exercise in sedentary, obese, middle-aged men. METHOD: In a randomized, cross-over design, nine middle-aged, sedentary, obese men completed two, 40-min exercise conditions (CYC and SSG) separated by a 21-d recovery period. Heart rate (HR) and Ratings of Perceived Exertion were collected during each bout. Needle biopsy from the m. vastus lateralis were collected at rest, 30 and 240min post-exercise for analysis of protein content and phosphorylation (PGC-1 , SIRT1, p53, p53 , AMPK, AMPK , CAMKII, CAMKII , p38MAPK and p38MAPK ) and mRNA expression (PGC-1 , p53, NRF1, NRF2, Tfam and cytochrome-c). RESULTS: A main effect of time effect for both conditions was evident for HR, RPE and blood lactate (P<0.05), with no condition by time interaction (P>0.05). Both conditions increased PGC1- protein and mRNA expression at 240min (P<0.05). AMPK increased 30min post CYC (P<0.05), with no change in SSG (P>0.05). CYC increased p53 protein content at 240min to a greater extent than SSG (P<0.05). mRNA expression of NRF2 decreased in both conditions (P<0.05). No condition x time interactions were evident for mRNA expression of Tfam, NRF1, cytochrome-c and p53. CONCLUSIONS: The similar PGC-1 response between intensity-matched conditions suggests both conditions are of similar benefit for stimulating mitochondrial biogenesis. Differences between conditions regarding fluctuation in exercise intensity and type of muscle contraction may explain the increase of p53 and AMPK within CYC and not SSG (non-contact, modified football). |
| File Format | HTM / HTML |
| ISSN | 87507587 |
| e-ISSN | 15221601 |
| Journal | Journal of Applied Physiology |
| Language | English |
| Publisher | American Physiological Society |
| Publisher Date | 2016-10-14 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Applied Physiology Molecular Biology Biochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Sports Science |
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