2011 Compendium of Physical Activities

Ainsworth, Barbara E.; Haskell, William L.; Herrmann, Stephen D.; Meckes, Nathanael; Bassett, David R.; Tudor‐Locke, Catrine; Greer, Jennifer L.; Vezina, Jesse W.; Whitt-Glover, Melicia C.; Leon, Arthur S.

doi:10.1249/mss.0b013e31821ece12

Cited by 4,938 publications

(2,382 citation statements)

References 34 publications

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“…Exercise dose was calculated using metabolic equivalent of task hours (MET‐hours), as done in previous studies 4. The individual MET value for each exercise activity was assigned according to the 2011 Compendium of Physical Activity 10, 11. The MET value for each exercise activity was multiplied by its duration, which was annualized to obtain MET‐hours per year.…”

Section: Methodsmentioning

confidence: 99%

Impact of Exercise Restriction on Arrhythmic Risk Among Patients With Arrhythmogenic Right Ventricular Cardiomyopathy

Wang

Orgeron

Tichnell

et al. 2018

JAHA

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BackgroundPrior studies have shown a close link between exercise and development of arrhythmogenic right ventricular cardiomyopathy. How much exercise restriction reduces ventricular arrhythmia (VA), how genotype modifies its benefit, and whether it reduces risk sufficiently to defer implantable cardioverter‐defibrillator (ICD) placement in arrhythmogenic right ventricular cardiomyopathy are unknown.Methods and ResultsWe interviewed 129 arrhythmogenic right ventricular cardiomyopathy patients (age: 34.0±14.8 years; male: 60%) with ICDs (36% primary prevention) about exercise participation. Exercise change was defined as annual exercise duration and dose in the 3 years before clinical presentation minus that after presentation. The primary outcome was appropriate ICD therapy for VA. During the 5.1 years (interquartile range: 2.7–10.8 years) after presentation, 74% (95/129) patients reduced exercise dose and 85 (66%) patients experienced the primary outcome. In multivariate analyses, top tertile reduction in exercise duration and dose were both associated with less VA (duration: hazard ratio: 0.23 [95% confidence interval, 0.07–0.81]; dose: hazard ratio: 0.14 [95% confidence interval, 0.04–0.44]). Greater reduction in exercise dose conferred greater reduction in VA (P=0.01 for trend). Patients without desmosomal mutations and those with primary‐prevention ICDs benefited more from exercise reduction (P=0.16 and P=0.06 for interaction); however, 58% (18/31) of athletes who reduced exercise dose by >80% still experienced VA.ConclusionsExercise restriction should be recommended to all arrhythmogenic right ventricular cardiomyopathy patients with ICDs. Patients who are “gene‐elusive” and those with primary‐prevention devices may particularly benefit. Exercise reduction is unlikely to reduce arrhythmia sufficiently in high‐risk patients to alter decision‐making regarding ICD implantation.

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Section: Methodsmentioning

confidence: 99%

Impact of Exercise Restriction on Arrhythmic Risk Among Patients With Arrhythmogenic Right Ventricular Cardiomyopathy

Wang

Orgeron

Tichnell

et al. 2018

JAHA

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“…Exercise was considered as any planned, structured, and repetitive physical activity performed outside gymnastics classes performed at school. The mean weekly exercise level was calculated as the product of duration and frequency of each activity (in hours/week), weighted by an estimate of the metabolic equivalent of the activity (MET), and summed for the activities performed 29 . The whole cohort was divided into tertiles of exercise, and individuals were classified as sedentary, moderately active, and active.…”

Section: Measurementsmentioning

confidence: 99%

Blood pressure and sodium intake from snacks in adolescents

et al. 2015

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“…The metabolic rates for each activity were derived from Ainsworth et al (2011) and customized for the pupils in this study according to the Harris-Benedict equation (Harris and Benedict, 1918). As example, Fig.…”

Section: Correlation Between Coarse Particle Resuspension and Co 2 Comentioning

confidence: 99%

Particle Resuspension in School Gyms during Physical Activities

Buonanno

Fuoco

Marini

et al. 2012

Aerosol Air Qual. Res.

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The aim of this work was to quantify the exposure of children to particle resuspension in school gyms. In fact, although moderate standard aerobic activity is suggested for good health, adverse health effects could affect people exercising in micro-environments with ambient pollution. Overall, 12 micro-environments were chosen and analyzed in a 3-month experimental campaign. The different fractions of particulate matter (PM) were measured by means of photometers, calibrated for the specific aerosols studied through gravimetric samplers, whereas particle number distributions in the 0.5-20 μm range were continuously measured using an Aerodynamic Particle Sizer (APS) spectrometer. High PM concentration levels were measured in school gyms compared to outdoor values. The dominant source is the particle resuspension produced by the activity of exercising pupils and, among the various PM fractions, the effect on coarse particles (PM 10-2.5 ) was found to be the most important, with the related emissions factors measured in the range of 1.5-8.9 mg/min. During school activities, under natural ventilation conditions, the average coarse particle concentrations at the 12 school gyms investigated were found to be 4.8 ± 2.0 times higher than the background (outdoor) values. The key parameters are the number and intensity of the physical activities, which can be characterized by the total energy used by the students. Therefore, this study provides useful data on the exposure of students to airborne particles during periods of physical activity in gyms with natural ventilation.

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2011 Compendium of Physical Activities

Cited by 4,938 publications

References 34 publications

Impact of Exercise Restriction on Arrhythmic Risk Among Patients With Arrhythmogenic Right Ventricular Cardiomyopathy

Impact of Exercise Restriction on Arrhythmic Risk Among Patients With Arrhythmogenic Right Ventricular Cardiomyopathy

Blood pressure and sodium intake from snacks in adolescents

Particle Resuspension in School Gyms during Physical Activities

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