Table 3

Relative percentage of congruent answers by 'maintaining strength' and 'enhancing endurance' as rationales for supplement use and supplement used by all athletes who reported the use of nutritional supplements (n = 520)



Maintain strength
Enhance endurance



Yes

No

Yes

No


Creatine
Yes
124
62.6%
64
19.9%





No
74
37.4%
258
80.1%






198
100.0%
322
100.0%




Iron
Yes




33
31.7%
122
29.3%

No




71
68.3%
294
70.7%






104
100.0%
416
100.0%
Ginseng
Yes









No








Whey protein
Yes
111
56.1%
48
14.9%





No
87
43.9%
274
85.1%






198
100.0%
322
100.0%




Caffeine
Yes




49
47.1%
75
18.0%

No




55
52.9%
341
82.0%






104
100.0%
416
100.0%
Vitamin C
Yes









No









Petróczi et al. Journal of the International Society of Sports Nutrition 2007 4:19   doi:10.1186/1550-2783-4-19

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