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Investigate how manipulating the time between caffeine ingestion and exercise may alter exercise performance and cognition
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Caffeine -60 | Active Comparator | Caffeine at 60 minutes prior to time trial |
|
| Caffeine -30 | Active Comparator | Caffeine at 30 minutes prior to time trial |
|
| Caffeine 0 | Active Comparator | Caffeine immediately prior to time trial |
|
| Placebo | Placebo Comparator | Placebo drink at all time points |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Caffeine powder -60 | Other |
| ||
| Caffeine powder -30 |
| Measure | Description | Time Frame |
|---|---|---|
| Work done in kilojoules (kJ) during a 15 minute time trial on a cycle ergometer | 15 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Whole body fuel substrate utilisation measured using indirect calorimetry | 10 minutes | |
| Change in plasma caffeine concentration and metabolites | 2 hours 45 minutes | |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Sport and Health Sciences | Exeter | Devon | EX1 2LU | United Kingdom |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 32232597 | Derived | Davenport AD, Jameson TSO, Kilroe SP, Monteyne AJ, Pavis GF, Wall BT, Dirks ML, Alamdari N, Mikus CR, Stephens FB. A Randomised, Placebo-Controlled, Crossover Study Investigating the Optimal Timing of a Caffeine-Containing Supplement for Exercise Performance. Sports Med Open. 2020 Mar 30;6(1):17. doi: 10.1186/s40798-020-00246-x. |
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|
| Caffeine powder 0 | Other |
|
| Placebo powder -60 | Other |
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| Placebo powder -30 | Other |
|
| Placebo powder 0 | Other |
|
| Change in cognitive function measured using stroop test |
| 2 hours 45 minutes |
| Collection of saliva for genotyping of CYP1A2 | 30 mintes |