Variable Mean ± SD Range
Age (yr) 35.2 ±14.0 18 – 72
Mass (kg) 74.6 ± 9.3 55.9 – 115.9
Height (cm) 179.8 ± 7.1 152.4 – 198.1
Exercise sessions (#/wk) 8.1 ± 3.4 1 – 30
Exercise hours (#/wk) 12.3 ± 5.7 4 – 53
Training history (yr) 5.7 ± 7.0 0 – 56
Table 2. Characteristic and training data by record status Full Records Returned
(n=108)
No Records Returned (n=111)
Variable Mean ± SD Range Mean ± SD Range p-value
Age (yrs) 38.6 ± 13.8 18 – 70 32.0 ± 13.3 18 – 72 <0.001 Mass (kg) 74.9 ± 8.7 57.3 – 107.3 74.2 ± 9.8 55.9 – 115.9 0.285 Height (cm) 179.6 ± 6.3 165.1 – 198.1 180.1 ± 7.9 152.4 – 195.6 0.300 Exercise sessions (#/wk) 7.7 ± 2.9 3 – 16 8.4 ± 3.8 1 – 30 0.106 Exercise hours (#/wk) 12.2 ± 5.4 5 – 53 12.3 ± 6.0 4 – 50 0.896 Training history (yrs) 6.0 ± 7.7 0.5 – 45 5.4 ± 6.3 0 – 56 0.527
Table 3. Descriptive characteristics by record status Full Records (n=108) No Records (n=111) Total (n=219) Chi-Square
Variable Frequency Frequency Total p-value
Hear about the study 0.665
Coach 17 24 41
Training Group 19 24 43
Organization 20 20 40
Friend 33 28 61
Other 18 15 33
Belong to Training Group 0.020
Online Group 4 11 15 In-person Group 55 68 123 Other 13 13 26 No 36 19 55 Military Status 0.813 Active 3 2 5 Veteran 5 4 9
No, never served 99 105 204
Next Event 0.019
Running 49 53 102
Cycling 33 16 49
133
Other 6 8 14
Primary Exercise Mode 0.637
Running 55 62 117 Cycling 45 39 84 Swimming 3 2 5 Other 5 8 13 Weightlifting Frequency 0.459 1/wk 7 7 14 2/wk 27 29 56 3/wk 11 8 19 4/wk 5 4 9 5/wk 0 3 3 6 or more/wk 1 0 1 Completed a Marathon 55 61 117 0.550 1 13 14 27 0.848 2 5 4 9 3 3 4 7 4 4 6 10 5 3 7 10 6 or more 27 26 53 Completed a Triathlon 49 55 104 0.536 1 7 6 13 0.833 2 5 6 11 3 6 3 9 4 3 3 6 5 1 1 2 6 or more 27 36 63
Injury induced training break 54 73 0.018 3-5 wks 26 34 60 0.343 5-9 wks 12 16 28 9-12 wks 5 14 19 >12 wks 11 9 20 PA at job 0.623 <30 min/day 66 72 138 30-60 min/day 21 16 37 60-120 min/day 10 14 24 >120 min/day 11 9 20 Nutritional Supplements 47 43 90 0.472
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