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The aim of this observational study is to examine supplementation (e.g. caffeine or creatin) use in both male and female professional tennis players.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Tennis players |
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| Measure | Description | Time Frame |
|---|---|---|
| Supplementation questionnaire | The participants will be asked about their supplementation use using a questionnaire. Participants will have a list of possible supplements on this questionnaire and they will be asked to indicate which supplement they take on a regular basis (at least once every three months). The primary outcome measure will be the frequency (as a percentage) of the supplement intake. | October 2017 - September 2018 |
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Inclusion Criteria:
Exclusion Criteria:
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The participants will have to be professional tennis players, both male and female.
Individual participant data will not be shared with other researchers.
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