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Table 3 Number of NS products used per athlete

From: Use of nutritional supplements by elite Japanese track and field athletes

  mean ± SD
Total 1.4 ± 1.6
Gender
 Males 1.3 ± 1.4
 Females 1.6 ± 1.7
p-value 0.008
Age groups
 Junior 1.0 ± 1.2
 Senior 1.8 ± 1.8
p-value < 0.001
Disciplines
 Sprinting 1.1 ± 1.2*
 Middle-distance 1.3 ± 1.3
 Long-distance 1.9 ± 1.8
 Hurdle 1.3 ± 1.4
 Jumping 1.1 ± 1.5*
 Throwing 1.1 ± 1.3*
 Combined events 1.3 ± 1.5
  1. SD Standard deviation
  2. The Mann-Whitney U test was used to analyze differences by gender and age. The p-values are shown
  3. The Kruskal-Wallis test was used to analyze differences among disciplines. *p < 0.05 vs. long-distance