The acute effects of thermogenic fitness drink formulas containing 140 mg and 100 mg of caffeine on energy expenditure and fat metabolism at rest and during exercise

Figures & data

Fig. 1 Experimental design of the study;

= hydration test,

= anthropometrics and body composition,

= blood draw, RMR= resting metabolic rate,

= thermogenic fitness drink formula,

=graded exercise test

Table 1 Participant demographics

Fig. 2 Resting energy expenditure (kcal/day); data (n = 32) are expressed as mean ± SE. # different than baseline; * different than placebo (p < 0.05). 30p = measurement average at 30 min post drink ingestion; 60p = measurement average at 60 min post drink ingestion; 90p = measurement average at 90 min post drink ingestion

Fig. 3 Resting fat oxidation (g/min); data (n = 32) are expressed as mean ± SE. # different than baseline; * different than placebo (p < 0.05). 30p = measurement average at 30 min post drink ingestion; 60p = measurement average at 60 min post drink ingestion; 90p = measurement average at 90 min post drink ingestion

Fig. 4 Resting serum glycerol concentration (μmol/L); data (n = 30) are expressed as mean ± SE. # different than baseline (p < 0.05). 30p = measurement taken at 30 min post drink ingestion; 60p = measurement taken at 60 min post drink ingestion; 90p = measurement taken 90 min post drink ingestion

Fig. 5 Maximal fat oxidation during exercise (g/min); data (n = 28) are expressed as mean ± SE

Table 2 GXT variables

Availability of data and materials

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.