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Table 2 Comparison of exercise frequency, duration, and type before and during deployment

From: Self-reported dietary supplement use in deployed United States service members pre-deployment vs. during deployment, Afghanistan, 2013–2014

Exercise descriptions Before deployment During deployment P
Exercise frequency
 Could not work out 27 (2%) 24 (1%) 0.6617
 Less than 2 times a week 218 (13%) 139 (8%) < 0.0001
 2-6 times a week 996 (60%) 859 (53%) < 0.0001
 Daily 358 (21%) 503 (31%) < 0.0001
 More than once a day 67 (4%) 109 (7%) < 0.0001
Exercise duration
 Less than 30 min 133 (8%) 85 (5%) < 0.0001
 30-60 min 999 (61%) 833 (52%) < 0.0001
 61-120 min 456 (28%) 615 (39%) < 0.0001
 More than 120 min 39 (3%) 69 (4%) < 0.0001
Exercise type
 Weightlifting 669 (40%) 1234 (73%) < 0.0001
 Cardio 1353 (80%) 1300 (77%) 0.0009
 Circuit training 402 (24%) 426 (25%) 0.1456
 Walking 161 (10%) 185 (11%) 0.0153
 Calisthenics 132 (8%) 120 (7%) 0.2008
 Other 66 (4%) 42 (2%) 0.0013
  1. Percentages given are out of all study participants (n = 1685). Participants may report more than one type of exercise. All P-values are for McNemar’s chi-square test for paired proportions