protocolSection identificationModule nctId: NCT06321861, orgStudyIdInfo id: Caffeine_motivation, briefTitle: Motivational, Affective and Performance Effects of Caffeine Supplementation, statusModule overallStatus: RECRUITING, startDateStruct date: 2024-01-19, primaryCompletionDateStruct date: 2024-05-01, completionDateStruct date: 2024-05-01, studyFirstPostDateStruct date: 2024-03-20, lastUpdatePostDateStruct date: 2024-03-20, sponsorCollaboratorsModule leadSponsor name: Jagiellonian University, class: OTHER, collaborators name: The Jerzy Kukuczka Academy of Physical Education in Katowice, collaborators name: University School of Physical Education, Krakow, Poland, descriptionModule briefSummary: The main objective of the study is to evaluate the influence of caffeine intake on participants' energetic arousal, affect, motivation to achieve a training goal, satisfaction with training, and the sense of agency during training. Consequently, participants will engage in three sessions: caffeine, placebo, and no substance (in counterbalanced order). During each session, their affective and motivational states will be assessed, along with the performance of a standardized physical exercise test. The investigators hypothesize that participants who consume caffeine (caffeine condition) will exhibit higher levels of energy and motivation compared to the other two groups. Additionally, they are expected to experience greater optimism and expectancy regarding their training goals and achieve better results in the physical exercise test.A secondary aim of the study is to examine the impact of genetic variability on motivational and affective states of participants, as well as their performance in the physical exercise test after caffeine. The investigators will assess the CYP1A2 (-163C \> A, rs762551; characterized such as "fast" (AA genotype) and "slow" caffeine metabolizers (C-carriers)) and ADORA2A (1976T \> C; rs5751876; characterized by "high" (TT genotype) or "low" sensitivity to caffeine (C-carriers))., conditionsModule conditions: Caffeine, conditions: Affect, conditions: Goals, designModule studyType: INTERVENTIONAL, phases: NA, designInfo allocation: RANDOMIZED, interventionModel: CROSSOVER, interventionModelDescription: Each participant will take part in three similar sessions differing by the substance they receive: caffeine (intervention group), placebo, no substance. Sessions will be about one week apart., primaryPurpose: BASIC_SCIENCE, maskingInfo masking: TRIPLE, whoMasked: PARTICIPANT, whoMasked: INVESTIGATOR, whoMasked: OUTCOMES_ASSESSOR, enrollmentInfo count: 40, type: ESTIMATED, armsInterventionsModule interventions name: Caffeine, interventions name: Placebo, interventions name: No substance, outcomesModule primaryOutcomes measure: Energetic arousal pre-test, primaryOutcomes measure: Energetic arousal post-test, primaryOutcomes measure: Optimism, primaryOutcomes measure: Motivation, primaryOutcomes measure: Determination, primaryOutcomes measure: Relative outcome expectancy, primaryOutcomes measure: Success probability, primaryOutcomes measure: Prospective effort, primaryOutcomes measure: Agency, primaryOutcomes measure: Performance in the 1RM test, primaryOutcomes measure: Performance in the bar velocity in the bench press test, primaryOutcomes measure: Performance in the strength-endurance test, primaryOutcomes measure: Performance in the countermovement jump test, primaryOutcomes measure: Satisfaction with the results, primaryOutcomes measure: Retrospective effort, primaryOutcomes measure: Retrospective agency, secondaryOutcomes measure: Goal importance, secondaryOutcomes measure: Prospective difficulty, secondaryOutcomes measure: Expected performance in the 1RM test, secondaryOutcomes measure: Expected performance in the bar velocity in the bench press test, secondaryOutcomes measure: Expected performance in the strength-endurance test, secondaryOutcomes measure: Expected performance in the countermovement jump test, secondaryOutcomes measure: Retrospective difficulty, secondaryOutcomes measure: Energetic arousal post-training, secondaryOutcomes measure: Perceived effect on agency, secondaryOutcomes measure: Tense arousal, secondaryOutcomes measure: Hedonic tone, eligibilityModule sex: ALL, minimumAge: 18 Years, maximumAge: 30 Years, stdAges: ADULT, contactsLocationsModule locations facility: The Jerzy Kukuczka Academy of Physical Education in Katowice, status: RECRUITING, city: Katowice, country: Poland, contacts name: Aleksandra Filip-Stachnik, role: CONTACT, geoPoint lat: 50.25841, lon: 19.02754, hasResults: False