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Fig. 5. Effect of Precaf, Durcaf, or Coke treatments on ratings of perceived exertion during 2-h steady-state cycling at 70% of VO2peax. Values are means + SE for 12 subjects. All differences are significant at P < 0.05: *main effect time, all time points different from ¢ = 10 min; *main effect treatment, Precaf < Placebo; »Durcaf > Precaf and Placebo; °Precaf and Durcaf < Placebo; ‘Durcaf < Placebo and Coke.

Figure 5 Effect of Precaf, Durcaf, or Coke treatments on ratings of perceived exertion during 2-h steady-state cycling at 70% of VO2peax. Values are means + SE for 12 subjects. All differences are significant at P < 0.05: *main effect time, all time points different from ¢ = 10 min; *main effect treatment, Precaf < Placebo; »Durcaf > Precaf and Placebo; °Precaf and Durcaf < Placebo; ‘Durcaf < Placebo and Coke.

Related Figures (6)

Fig. 1. Effect of 6 mg/kg body mass (BM) caffeine ingested 1 h preexercise (Precaf), 6 < 1 mg/kg BM caffeine ingested during exercise (Durcaf), or 2 5 ml/kg Coca-Cola ingested late in exercise (Coke) on plasma caffeine concentration before and during exercise (A) and postexercise urinary caffeine concentration (B) associated with a cycling task [2-h steady state at 70% of peak Oz uptake (VO2peax) + time trial (TT)]. Values are means + SE for 12 subjects. All differences are significant at P < 0.05: *different from —60 min: @ different from Durcaf, Coke, and Placebo; ? different from Coke and Placebo.
Fig. 1. Effect of 6 mg/kg body mass (BM) caffeine ingested 1 h preexercise (Precaf), 6 < 1 mg/kg BM caffeine ingested during exercise (Durcaf), or 2 5 ml/kg Coca-Cola ingested late in exercise (Coke) on plasma caffeine concentration before and during exercise (A) and postexercise urinary caffeine concentration (B) associated with a cycling task [2-h steady state at 70% of peak Oz uptake (VO2peax) + time trial (TT)]. Values are means + SE for 12 subjects. All differences are significant at P < 0.05: *different from —60 min: @ different from Durcaf, Coke, and Placebo; ? different from Coke and Placebo.
Fig. 2. Effect of Precaf, Durcaf, or Coke treatments on blood glucose concentrations (A), blood lactate concentrations (B), and plasma insulin concentrations (C) for 2 h after a carbohydrate (CHO)-rich meal and during a subsequent cycling task (2-h steady state at 70% of VOzpeak + TT). Values are means + SE for 12 subjects. All differences are significant at P < 0.05: ?Precaf > Durcaf, Coke, and Placebo; "Placebo < Precaf, Durcaf < Coke; °Placebo < Precaf, Durcaf, and Coke; ‘main effect treatment: Precaf > Durcaf, Coke > Placebo; °main effect treatment: Precaf and Durcaf > Coke and Placebo; *main effect time: different from time (t) = 0 min; *main effect time: different from ¢ = —120 min.
Fig. 2. Effect of Precaf, Durcaf, or Coke treatments on blood glucose concentrations (A), blood lactate concentrations (B), and plasma insulin concentrations (C) for 2 h after a carbohydrate (CHO)-rich meal and during a subsequent cycling task (2-h steady state at 70% of VOzpeak + TT). Values are means + SE for 12 subjects. All differences are significant at P < 0.05: ?Precaf > Durcaf, Coke, and Placebo; "Placebo < Precaf, Durcaf < Coke; °Placebo < Precaf, Durcaf, and Coke; ‘main effect treatment: Precaf > Durcaf, Coke > Placebo; °main effect treatment: Precaf and Durcaf > Coke and Placebo; *main effect time: different from time (t) = 0 min; *main effect time: different from ¢ = —120 min.
Time trial (TT) values are means + SE. Values in parentheses are confidence intervals. See METHODS for explanation of treatment groups. Table 1. Results of 7 kJ/kg TT following 120 min of steady-state cycling
Time trial (TT) values are means + SE. Values in parentheses are confidence intervals. See METHODS for explanation of treatment groups. Table 1. Results of 7 kJ/kg TT following 120 min of steady-state cycling
Fig. 6. Effect of intake of 3 x 5 ml/kg of various cola-flavored drinks (control, Caffeine, ExtraCHO, Coke) late in exercise on the perfor- mance of a 7 kJ/kg TT at the end of 2-h steady-state cycling at 70% of VOz2peax. Values are means + SE for 8 subjects, with %improve- ment (+95% confidence intervals) compared with control treatment. *Different from control, P < 0.05. See METHODS for explanation of cola drinks.
Fig. 6. Effect of intake of 3 x 5 ml/kg of various cola-flavored drinks (control, Caffeine, ExtraCHO, Coke) late in exercise on the perfor- mance of a 7 kJ/kg TT at the end of 2-h steady-state cycling at 70% of VOz2peax. Values are means + SE for 8 subjects, with %improve- ment (+95% confidence intervals) compared with control treatment. *Different from control, P < 0.05. See METHODS for explanation of cola drinks.
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