The trend observed in RESULTS is inconsistent that it is difficult to make an accurate judgment on the ergogenic effect of caffeine. A significant increase in the mean pulse rate was observed in both caffeinated group (50.0 beats/min) and decaffeinated group (47.9 beats/min) from pre-treatment to post-exercise (Table 1). However, the difference of change in the mean pulse rate (2.1 beats/min) between the two groups is small and considered statistically insignificant. Contrary to what happened in the mean pulse rate, the decaffeinated group experienced a higher increase (7.8 breaths/min) in the mean respiration rate than the caffeinated group did (7.0 breaths/min) in response to caffeine ingestion (Table 2). Yet, the difference in the respiration rate change (0.8 breaths/min) between the two groups is statistically irrelevant. Hence, the trend does not support the ergogenic benefit of caffeine on physical performance of the participants.
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Moreover, the results are in agreement with another study on the effect of caffeine ingestion on respiration rate that there was no significant difference in the exchange rate of oxygen and carbon dioxide before and after badminton
Moreover, the results are in agreement with another study on the effect of caffeine ingestion on respiration rate that there was no significant difference in the exchange rate of oxygen and carbon dioxide before and after badminton