Post by John A. Casler on Oct 30, 2008 14:57:33 GMT -8
The paper below was sent along to me by one of the Authors - Thomas D. Fahey
Thanks Tom ;D
SUDDEN CARDIAC DEATH
Thomas D. Fahey(A,B,C,D,E,F,G), George D. Swanson(A,B,C,D,E,F,G)
Department of Kinesiology, California State University, Chico, USA
Abstract
Background and Aims: Sudden cardiac death is the first symptom of heart disease in 25 to 40% of people. This paper introduced a model that can help determine the optimum amount of exercise in relation to a categorical outcome variable such as sudden death, stroke, inflammation or infection.
Methods: We illustrated its utility using data from the Physicians¡¯ Health Study to predict the optimal exercise patterns that protect people from coronary artery disease while minimizing the risk of sudden cardiac death during exercise. The model extended the utility of case-crossover methods, which yield an odds ratio of dying while exercising compared to rest.
Results: With the assumption that the relative frequency of sudden death during exercise is linearly related to the proportion
of time spent exercising, the analysis rendered a ¡±U-shaped¡± curve between the relative risk of sudden death and
the weekly volume of moderate intensity exercise. The model predicted that men 40 to 80 yr should exercise 30 minutes a
day (¡Ý 6 METS) six days a week to receive the benefits of exercise and minimize the risk of sudden death.
Conclusions: These results were consistent with exercise recommendations from the American College of Sports
Medicine and the American Heart Association.
Lower or higher amounts of exercise increased the risk of sudden death. Exercise is extremely safe in the absence
of heart disease. Heart disease often has no symptoms, so people have no way of knowing definitively if they are in the
high-risk cohort. This model is useful for other ¡°U¡± shaped phenomena, such as exercise induced inflammation, stroke, and
upper respiratory infection.
To read the full text:
www.medicinasportiva.pl/new/pliki/ms_2008_04_03_Fahey.pdf
Thanks Tom ;D
SUDDEN CARDIAC DEATH
Thomas D. Fahey(A,B,C,D,E,F,G), George D. Swanson(A,B,C,D,E,F,G)
Department of Kinesiology, California State University, Chico, USA
Abstract
Background and Aims: Sudden cardiac death is the first symptom of heart disease in 25 to 40% of people. This paper introduced a model that can help determine the optimum amount of exercise in relation to a categorical outcome variable such as sudden death, stroke, inflammation or infection.
Methods: We illustrated its utility using data from the Physicians¡¯ Health Study to predict the optimal exercise patterns that protect people from coronary artery disease while minimizing the risk of sudden cardiac death during exercise. The model extended the utility of case-crossover methods, which yield an odds ratio of dying while exercising compared to rest.
Results: With the assumption that the relative frequency of sudden death during exercise is linearly related to the proportion
of time spent exercising, the analysis rendered a ¡±U-shaped¡± curve between the relative risk of sudden death and
the weekly volume of moderate intensity exercise. The model predicted that men 40 to 80 yr should exercise 30 minutes a
day (¡Ý 6 METS) six days a week to receive the benefits of exercise and minimize the risk of sudden death.
Conclusions: These results were consistent with exercise recommendations from the American College of Sports
Medicine and the American Heart Association.
Lower or higher amounts of exercise increased the risk of sudden death. Exercise is extremely safe in the absence
of heart disease. Heart disease often has no symptoms, so people have no way of knowing definitively if they are in the
high-risk cohort. This model is useful for other ¡°U¡± shaped phenomena, such as exercise induced inflammation, stroke, and
upper respiratory infection.
To read the full text:
www.medicinasportiva.pl/new/pliki/ms_2008_04_03_Fahey.pdf