Table 2 Descriptive statistics for study variables and differences between means on supplement and placebo conditions. N = 37 Mean (±SD) Min – Max p-value General Vitality a 4.50 (1.19) 1.00 – 6.83 ReducedSense of Accomplishment b 2.49 (.73) 1.00 – 3.60 Emotional/Physical Exhaustion b 3.25 (.79) 1.20 – 4.80 Devaluation b 2.79 (.97) 1.00 – 4.60 N = 34 Current Vitality a Supplement Placebo 4.21 (1.07) 3.99 (.83) 1.42 – 6.83 2.25 – 6.00 .22 Energetic c Supplement Placebo 2.38 (.61) 2.31 (.59) 1.00 – 3.60 1.20 – 4.00 .42 Tiredness c Supplement Placebo 2.27 (.71) 2.45 (.66) 1.00 – 3.7 0 1.20 – 4.00 .15 Tension c Supplement Placebo 1.64 (.48) 1.62 (.44) 1.00 – 2.70 1.00 – 2.50 .72 Calmness c Supplement Placebo 2.32 (.52) 2.44 (.54) 1.40 – 3.60 1.10 – 3.50 .19 Scores are on a scale of 1 to 7 for the General Vitality Scale and Current Feelings of Vitality Scale. Scores are on a scale of 1 to 5 for the Athlete Burnout Questionnaire. Scores are on a scale of 1 to 4 for the Activation-Deactivation Adjective Checklist.