Navigation Links
Mass. General study shows how exercise changes structure and function of heart
Date:4/22/2008

For the first time researchers are beginning to understand exactly how various forms of exercise impact the heart. Massachusetts General Hospital (MGH) investigators, in collaboration with the Harvard University Health Services, have found that 90 days of vigorous athletic training produces significant changes in cardiac structure and function and that the type of change varies with the type of exercise performed. Their study appears in the April Journal of Applied Physiology.

Most of what we know about cardiac changes in athletes and other physically active people comes from snapshots, taken at one specific point in time. What we did in this first-of-a-kind study was to follow athletes over several months to determine how the training process actually causes change to occur, says Aaron Baggish, MD, a fellow in the MGH Cardiology Division and lead author of the study.

To investigate how exercise affects the heart over time, the MGH researchers enrolled two groups of Harvard University student athletes at the beginning of the fall 2006 semester. One group was comprised of endurance athletes 20 male and 20 female rowers and the other, strength athletes 35 male football players. Student athletes were studied while participating their normal team training, with emphasis on how the heart adapts to a typical season of competitive athletics.

Echocardiography studies ultrasound examination of the hearts structure and function were taken at the beginning and end of the 90-day study period. Participants followed the normal training regimens developed by their coaches and trainers, and weekly training activity was recorded. Endurance training included one- to three-hour sessions of on-water practice or use of indoor rowing equipment. The strength athletes took part in skill-focused drills, exercises designed to improve muscle strength and reaction time, and supervised weight training. Participants also were questioned confidentially about the use of steroids, and any who reported such use were excluded from the study.

At the end of the 90-day study period, both groups had significant overall increases in the size of their hearts. For endurance athletes, the left and right ventricles the chambers that send blood into the aorta and to the lungs, respectively expanded. In contrast, the heart muscle of the strength athletes tended to thicken, a phenomenon that appeared to be confined to the left ventricle. The most significant functional differences related to the relaxation of the heart muscle between beats which increased in the endurance athletes but decreased in strength athletes, while still remaining within normal ranges.

We were quite surprised by both the magnitude of changes over a relatively short period and by how great the differences were between the two groups of athletes, Baggish says. The functional differences raise questions about the potential impact of long-term training, which should be followed up in future studies.

While this study looks at young athletes with healthy hearts, the information it provides may someday benefit heart disease patients. The take-home message is that, just as not all heart disease is equal, not all exercise prescriptions are equal, Baggish explains. This should start us thinking about whether we should tailor the type of exercise patients should do to their specific type of heart disease. The concept will need to be studied in heart disease patients before we can make any definitive recommendations.


'/>"/>

Contact: Sue McGreevey
smcgreevey@partners.org
617-724-2764
Massachusetts General Hospital
Source:Eurekalert

Related biology news :

1. American Society for Microbiology 108th General Meeting
2. Remarks Prepared for Delivery By Attorney General Michael B. Mukasey At the Ministerial Press Conference
3. In nature -- and maybe the corner office -- scientists find that generalists can thrive
4. Generalist bacteria discovered in coastal waters may be more flexible than known before
5. Society for General Microbiology 161st Meeting, University of Edinburgh
6. Analysis of RNA role in spreading disease advances study of damaging plant infections
7. Arctic ice more vulnerable to sunny weather, new study shows
8. Three Dimensional Visualization of Right Ventricle Provides Important Information for Treatment of Patients with Tetralogy of Fallot, According to a Study in The American Journal of Cardiology
9. New study predicts where corals can thrive
10. Sudden Oak Death pathogen is evolving, says new study that reconstructs the epidemic
11. Fishing throws targeted species off balance, Scripps study shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/25/2017)... 25, 2017 The Elements of Enterprise Information ... is comprised of a comprehensive set of business ... maintaining digital identities and providing a secured and ... are significant number of programs opted by enterprises ... by optimizing processes and changing policies. However, there ...
(Date:1/21/2017)... DUBLIN , Jan 20, 2017 Research ... Recognition Biometrics Market 2017-2021" report to their offering. ... The global voice recognition ... period 2017-2021. The report covers the present scenario ... for 2017-2021. To calculate the market size, the report considers the ...
(Date:1/18/2017)... MINNETONKA, Minn. , Jan. 18, 2017 /PRNewswire/ ... eClinical technology company that supports the entire spectrum ... 2016 has been another record-breaking year for the ... and market interest in MedNet,s eClinical products and ... to the tremendous marketplace success of ...
Breaking Biology News(10 mins):
(Date:2/22/2017)... 22, 2017  Aratana Therapeutics, Inc. (NASDAQ: PETX), a pet ... innovative biopharmaceutical products for companion animals, will host a live ... ET to discuss financial results from the fourth quarter and ... participants and investors may access the audio webcast ... ...
(Date:2/22/2017)... ... , ... Park Systems , a leader in Atomic Force Microscopy (AFM) ... attendees and Park customers on Feb. 27, 2017 from 12-2pm at Morton’s The ... The luncheon will feature a talk on Automated AFM for Small-Scale and Large-Scale ...
(Date:2/22/2017)... Feb. 22, 2017 Scientists propose in ... organ damage in Gaucher and maybe other lysosomal storage ... lower costs than current therapies. An international ... Center , which also included investigators from the University ... their data Feb. 22. The study was conducted in ...
(Date:2/22/2017)... ... 22, 2017 , ... ProMIS Neurosciences (“ProMIS” or the “Company”), ... today announced it has issued a scientific white paper entitled “Results from recent ... of commentaries from ProMIS’s scientific team offering insight into the Company’s product portfolio ...
Breaking Biology Technology: