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Physical training induced resting bradycardia and its association with cardiac autonomic nervous activities.
MedLine Citation:
PMID:  22081187     Owner:  NLM     Status:  In-Data-Review    
Regular physical exercise causes resting bradycardia. This exercise-induced resting bradycardia may be associated with exercise-induced changes in Cardiac autonomic nervous activities (CANA). Power Spectral Analysis (PSA) of Heart rate variability (HRV) is one of the most promising new techniques to quantify CANA. Regular physical exercise induced bradycardia is associated with exercise-induced adaptation in CANA. To observe the HRV parameters by frequency domain method (PSA), in male adolescent athletes in order to find out the influence of regular physical exercise on resting heart rate (HR) and CANA. The cross sectional study was carried out on 62 adolescent male athletes aged 12-18 years (group B), in the Department of Physiology, Bangabandhu Sheikh Mujib Medical University from 1st July 2007 to 30th June 2008. For comparison 30 age, sex and socioeconomic condition matched apparently healthy sedentary subjects (group A) were also studied. The study group was selected from the BKSP (Bangladesh Krira Shikka Prothistan, Savar, Dhaka) and the control from a residential school of Dhaka city. HRV parameters were assessed by Polygraph (Polyrite D, version 2.2). For statistical analysis Independent-Samples t-test was done as applicable. Resting mean HR was significantly (p<0.001) lower in the athletes. The mean value of Total (variance), VLF, LF and HF power was significantly (p<0.001) higher in athletes than that of non-athetes. Regular physical exercise-induced resting bradycardia is associated with exercise-induced adaptation in cardiac autonomic nervous activities.
M M Alom; N I Bhuiyan; M M Hossain; M F Hoque; R J Rozario; W Nessa
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Mymensingh medical journal : MMJ     Volume:  20     ISSN:  1022-4742     ISO Abbreviation:  Mymensingh Med J     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-11-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9601799     Medline TA:  Mymensingh Med J     Country:  Bangladesh    
Other Details:
Languages:  eng     Pagination:  665-70     Citation Subset:  IM    
Dr Md Mashudul Alom, Associate Professor and Head, Department of Physiology, Sylhet Women's Medical College, Sylhet, Bangladesh.
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