Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Walking often and far reduces risks in heart patients

13.05.2009
Study highlights:
  • Walking longer at a slower pace improved heart health much more effectively than standard cardiac rehabilitation of walking a shorter distance at a brisker pace in overweight patients with coronary heart disease.
  • In this study, moderate-pace walking for 45–60 minutes on five to six days was considered high-calorie-burning exercise.
  • Researchers said it’s necessary to modify traditional rehabilitation because more heart patients are overweight.

An exercise program that burns a lot of calories reduced cardiac risk factors better than standard cardiac rehabilitation in overweight coronary patients, researchers report in Circulation: Journal of the American Heart Association.

“The higher-caloric exercise, consisting of almost daily long-distance walking, resulted in double the weight loss and a greater fat mass loss than standard cardiac rehabilitation exercise,” said Philip A. Ades, M.D., lead author of the study and professor of medicine and director of cardiac rehabilitation and prevention at the University of Vermont College of Medicine in Burlington. “And probably most importantly, these patients improved their insulin sensitivity to a greater degree.”

The high-calorie expenditure regime was not more intensive than rehabilitation, but longer duration at lower intensity on more days.

In a first-of-its-kind study, researchers randomized 74 overweight cardiac rehabilitation patients (average age 64, 20 percent women) to either a high-caloric expenditure exercise regimen intended to burn 3,000 to 3,500 calories a week or a standard rehab therapy burning 700 to 800 calories weekly.

After five months, compared to the group doing traditional rehabilitation, patients in the high-calorie-burning group had:

• significantly greater improvement in 10 heart risk factors, including insulin sensitivity (a hallmark of the metabolic syndrome), total cholesterol and the total cholesterol/good cholesterol ratio, blood pressure, and cardio-respiratory fitness; and

• a greater average reduction in weight (18 vs. 8 pounds), body fat, (13 vs. 6 pounds) and waistlines (2.7 vs. 2 inches).

Researchers said all of these changes were statistically significant.

“Cardiac rehab has essentially remained the same since the 1970s because it has a mortality benefit,” Ades said. “But it doesn’t burn many calories and things have changed. Eighty percent of our rehabilitation patients are now overweight and many of them are becoming diabetic. It’s a different time in terms of what we need to do in cardiac rehab.”

Excessive weight increases the risk of heart attacks and is associated with an increase in other heart risks factors, including high cholesterol, hypertension and diabetes.

High-calorie-expenditure exercise consisted of walking for 45 to 60 minutes a day at a moderate pace – a lower speed than standard therapy – for five to six days a week. Standard rehabilitation involved walking, biking or rowing for 25 to 40 minutes at a brisker pace three times a week.

While standard rehabilitation has benefit, the high-calorie-burning exercise increased the benefit, which is crucial with the increasing prevalence of obesity, researchers noted.

The study’s message is “walk often and walk far.”

However, Ades said cardiac patients require supervision by medical staff.

“Since they were walking at a lower intensity, we were comfortable with them doing it on their own,” Ades said. “We suspect that the general applicability of the high-caloric expenditure exercise programs in cardiac rehabilitation will be broad, although staff and patients will need to be comfortable with performing much of the five- to six-day-per-week exercise program away from the highly monitored rehab facility.”

The two groups were similar at baseline in age, gender, body weight and fat distribution.

After five months, the patients were left more on their own to continue their exercise programs, which most did.

“If you start patients in this program with the proper support, and you start getting positive results, it is surprising to me how well it is accepted,” Ades said. “The amount of exercise wasn’t the problem; and the fact that they where losing weight supported the behavior change.”

One year after entering the study, both groups had regained a few pounds from their five-month weights, an average of 2.9 pounds for the high-exercise group and two pounds for the low-exercise patients, not a significant difference between the two. However, weight and body fat remained significantly lower in both groups.

Researchers are following the participants to determine whether high-calorie exercise improves the incidence of death and disability.

Co-authors are Patrick D. Savage, M.S.; Michael J. Toth, Ph.D.; Jean Harvey-Berino, Ph.D., R.D.; David J. Schneider, M.D.; Janice Y. Bunn, Ph.D.; Marie C. Audelin, M.D.; and Maryann Ludlow, R.D. Individual author disclosures can be found on the manuscript.

The study was supported by grants from the National Institutes of Health and the General Clinical Research Center at the University of Vermont College of Medicine.

Editor’s Note: The American Heart Association’s Start! initiative encourages all Americans to participate in regular physical activity. Start! created personalized walking plans for people at any fitness level. Visit www.twalkingnow.org to download the Start! Walking Plans and locate Start! Walking Paths near you.

Statements and conclusions of study authors published in American Heart Association scientific journals are solely those of the study authors and do not necessarily reflect the association’s policy or position. The association makes no representation or guarantee as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events. The association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and device corporations are available at www.americanheart.org/corporatefunding.

Bridgette McNeill | EurekAlert!
Further information:
http://www.americanheart.org/corporatefunding

More articles from Health and Medicine:

nachricht Chronic stress induces fatal organ dysfunctions via a new neural circuit
21.08.2017 | Hokkaido University

nachricht New malaria analysis method reveals disease severity in minutes
14.08.2017 | University of British Columbia

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Nagoya physicists resolve long-standing mystery of structure-less transition

21.08.2017 | Materials Sciences

Chronic stress induces fatal organ dysfunctions via a new neural circuit

21.08.2017 | Health and Medicine

Scientists from the MSU studied new liquid-crystalline photochrom

21.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>