Table 1 Demographics by weight-based sodium intake
Variable | Low sodium intake Mean (SD); Median (min–max) | Medium sodium intake Mean (SD); Median (min–max) | High sodium intake Mean (SD); Median (min–max) | P value |
|---|---|---|---|---|
Runner characteristics, n (%) | 53 (32.9) | 53 (32.9) | 55 (34.2) | – |
Age, years | 45 (8.4); 45 (24–63) | 42 (8.3); 42 (23–56) | 41 (9.2); 41 (23–65) | 0.06 |
Sex | 0.66 | |||
Female, n (%) | 15 (28.3) | 19 (35.9) | 19 (35) | |
Male, n (%) | 38 (71.7) | 34 (64.2) | 35 (64.8) | |
Height, cm | 174 (8.8); 175 (157–188) | 177 (8.1); 177 (158–193) | 175 (8.2); 177 (160–195) | 0.3 |
Weight (starting), kg | 76 (13.4); 74 (52–106) | 73 (10.9); 74 (58–101) | 72 (10.5); 73 (52–94) | 0.26 |
BMI, kg/m2 | 25 (3.3); 24 (18–34) | 23 (2.4); 23 (19–31) | 23 (2.7); 23 (18–33) | 0.01 |
Pack weight (starting), kg | 10 (2); 10 (7–17) | 10 (1.7); 10 (8–15) | 10 (1.8); 10 (6–15) | 0.37 |
# prior marathons | 13 (15.2); 7 (0–50) | 14 (28.8); 3 (0–130) | 7 (9.6); 3 (0–40) | 0.15 |
# prior ultramarathons | 6 (6.7); 5 (0–35) | 11 (14.3); 5 (0–70) | 6 (7.3); 4 (0–40) | 0.02 |
Running distance/week, km | 72 (35.4); 70 (20–175) | 62 (31); 60 (16–160) | 81 (93.6); 60 (25–700) | 0.28 |
Greatest running distance/week, km | 131 (75.8); 105 (18–300) | 132 (79); 105 (20–300) | 144 (133.1); 100 (24–700) | 0.76 |
Longest single run | 121 (109); 88 (14–700) | 118 (83.3); 100 (12–400) | 117 (72); 90 (30–330) | 0.97 |