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Table 3 Descriptive statistics for the variables evaluated and the five treatments in all participants (n = 14)*

From: Effects of energy drink major bioactive compounds on the performance of young adults in fitness and cognitive tests: a randomized controlled trial

  Placebo Caffeine C + T Taurine Commercial drink P value
VO 2 max (ml/kg/min) 61.3 í 6.2 61.1 í 5.2 61.8 í 5.4 60.6 í 5.1 61.1 í 5.1 0.736
HRmax (beats per min) 196 í 6.8 196.5 í 4.5 197.1 í 6 197.8 í 6.6 196.4 í 6.2 0.715
TTE (min) 17 í 1.2 17 í 1.03 16.8 í 1.2 16.9 í 1.4 16.8 í 1.2 0.836
RHS (kgf) 56.8 í 6.6 55.3 í 6.7 57.5 í 6.2 55.4 í 6.9 56.2 í 5.8 0.096
LHS (kgf) 53.1 í 5.9 53.5 í 4.9 54 í 6.3 52.6 í 7 52.9 í 5.5 0.607
VJ (cm) 41.1 í 3.8 41.7 í 3.8 41.5 í 4.2 42.5 í 4.4 40.9 í 4.1 0.066
GRID (number of observed digits) 19.9 í 5.9 19.8 í 4.4 20.6 í 4.5 19.1 í 4.7 19.3 í 3.5 0.763
DIGITS (number of remembered digits) 10.9 í 3.1 10.6 í 2.9 11.0 í 2.8 11.2 í 2.7 10.3 í 3.1 0.168
  1. *Values are mean í SD. C + T: caffeine + taurine, VO 2 max: maximal oxygen uptake, HR: heart rate, TTE: time to exhaustion, RHS: right handgrip strength, LRH: left handgrip strength, VJ: vertical jump, GRID: concentration test, DIGITS: immediate memory test.