Table 1. Characteristics of walkers and runners by self-reported physician-diagnosed cardiac arrhythmia.

	Walkers		Runners
	Events	Non-events	Events	Non-events
N	412	14,322	648	31,425
Male (%)	26.0	18.6	63.7	50.5
Age (years)	59.5±12.6	54.0±12.1	50.8±12.4	44.3±11.2
Education (years)	15.6±2.6	15.5±2.6	17.0±2.2	16.6±2.4
Smokers (%)	2.9	3.6	0.8	1.5
Meat (serving/d)	0.42±0.35	0.39±0.35	0.36±0.35	0.36±0.37
Fruit (pieces/d)	1.7±1.2	1.7±1.2	1.6±1.1	1.5±1.1
Alcohol (g/d)	6.1±10.5	5.8±10.2	9.5±12.4	7.8±11.3
Exercise energy expenditure (METhr/d)
Running			4.7±3.1	5.0±3.1
Walking	1.9±1.6	2.2±1.6
Other vigorous	1.4±2.7	1.5±3.1	2.1±3.5	1.9±3.3
Other moderate	0.4±1.3	0.4±1.3	0.8±1.6	0.8±1.7
Other light	0.1±0.5	0.0±0.4	0.0±0.6	0.0±0.3
Strengthening	0.2±0.9	0.2±0.8	0.5±1.0	0.5±1.3
Non-strengthening	1.7±3.0	1.7±3.2	2.5±3.9	2.2±3.5
Pace (m/s)	1.6±0.3	1.6±0.3	3.0±0.5	3.1±0.5
Walking frequency (walks/d)	0.8±0.4	0.8±0.5
Longest walk (km)	5.7±3.2	6.5±4.0
10-km performance (m/s)			3.5±0.6	3.6±0.6
Marathons (# in 5 years)			1.8±4.3	1.7±4.0
Years run or walked	9.1±8.5	8.9±8.3	14.4±10.2	11.9±8.6

Percent or mean ±SD. METhr/d: Metabolic equivalent hours per day.