Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
The goal of this clinical trial is to learn about the effects of caffeine on exercise physiology and the subsequent quantification of athlete training zones in trained cyclists. The main questions that it aims to answer are:
Participants will complete four trials on a cycle ergometer as follows:
Measures of heart rate, oxygen uptake, blood lactate, and perceived exertion will be recorded throughout all trials.
Researchers will compare the effects of exercise intensity, caffeine dose, and sex to see if they affect exercise physiology and training zone quantification.
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Low caffeine dose | Experimental | 2 mg/kg dose of caffeine (in pill form) |
|
| Moderate caffeine dose | Experimental | 5 mg/kg dose of caffeine (in pill form) |
|
| Placebo | Placebo Comparator | 5 mg/kg dose of placebo (Maltodextrin in pill form) |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Low caffeine dose | Drug | 2 mg/kg dose of caffeine in pill form |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Blood lactate concentration | Change from baseline in blood lactate concentration measured at rest and at seven different exercise intensities (50, 55, 60, 65, 70, 75, and 80% percent of maximal oxygen uptake) on an electromagnetically-braked cycle ergometer | From baseline to completion, up to 31 days |
| Heart rate | Change from baseline in heart rate measured at rest and at seven different exercise intensities (50, 55, 60, 65, 70, 75, and 80% percent of maximal oxygen uptake) on an electromagnetically-braked cycle ergometer | From baseline to completion, up to 31 days |
| Oxygen uptake | Change from baseline in oxygen uptake measured at rest and at seven different exercise intensities (50, 55, 60, 65, 70, 75, and 80% percent of maximal oxygen uptake) on an electromagnetically-braked cycle ergometer | From baseline to completion, up to 31 days |
| Perceived exertion | Change from baseline in rating of perceived exertion measured (using the 6-20 Borg scale) at seven different exercise intensities (50, 55, 60, 65, 70, 75, and 80% percent of maximal oxygen uptake) on an electromagnetically-braked cycle ergometer | From baseline to completion, up to 31 days |
Not provided
Not provided
Inclusion Criteria:
Exclusion Criteria:
-
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
| Moderate caffeine dose |
| Drug |
5 mg/kg dose of caffeine in pill form |
|
| Placebo | Drug | 5 mg/kg dose of maltodextrin in pill form |
|