The Effect of a Caffeine Blend on Reaction Time, Mental Performance and Focus in Athletic Males

Not Applicable

Completed

• Conditions: Mental Fatigue
• Interventions: Other: Sugar Pill; Dietary Supplement: Caffeine Blend

• Registration Number: NCT03019523
• Lead Sponsor: University of Mary Hardin-Baylor

Brief Summary

This is a cross-over design study in which subjects arrived to the lab and were assigned a supplement to ingest. Prior to ingestion subjects completed baseline reaction time testing along with a questionnaire. Thirty minutes after ingestion subjects filled out the same questionnaire, completed a reaction time test, followed by a series of dynamic exercises. After the last exercise was finished subjects filled out the questionnaire, completed another reaction time test and repeated the series of dynamic exercises. Following the exercises, subjects filled out the questionnaire and completed a fourth round of reaction time testing. In total subjects would complete 2 rounds of dynamic exercises and 4 rounds of reaction time testing with heart rate being recorded before and after the dynamic exercise rounds. Subjects were told to wash-out for 7 days and return to the lab to complete the same testing but on the alternative supplement.

Detailed Description

Subjects expressing interest in doing the study, were interviewed in the Human Performance Lab (HPL) to determine whether they appear to qualify to participate in the study. Qualifying subjects, were then invited back to the HPL for an entry/familiarization session and be verbally told all of the requirements of the study. During this session, subjects signed Informed Consent Statements and completed personal and medical history questionnaires. Subject were familiarized to the study protocol via a verbal and written explanation outlining the study design. This included describing the testing sessions to the subjects about the tests to be performed including the Makoto testing system (reaction time testing). Subjects practiced several times during this session to eliminate the learning curve of using new equipment. Subjects were also taken through 1 round of the dynamic exercises to ensure ability to complete each exercise as needed. Subjects were then given an appointment time to perform qualifying Makoto testing to achieve greater than or equal to 70% accuracy on 3 towers at a level 7 for three consecutive trails.

Following the practice session, subjects recorded all food intake via MyFitnessPal for three days (3-d) prior to baseline testing. Subjects were instructed to refrain from exercise, caffeine, and alcohol the day prior to baseline testing and to consume their normal breakfast the morning of testing. Subjects were given a meal replacement bar in place of lunch, to consume \~2 hours before their testing session. During this time, subjects had body composition and hemodynamic assessments recorded. Two hours after ingestion of meal bar subjects reported back to the HPL and completed a Visual Analog Scale (VAS) questionnaire, a baseline Makoto prior to ingesting their assigned supplement. Thirty minutes after ingestion, Makoto and dynamic exercisers were completed. This involved subjects doing a standardized full body workout in 2 different rounds of exercise. After each round of exercise subjects filled out the VAS and performed Makoto testing. Subject then were instructed to wash-out and were scheduled for their 2nd testing session \~7 days later.

Study Timeline

• Study Start: 2016-08
• Primary Completion: 2016-12
• Study Completion: 2016-12
• Study First Submitted: 2016-12-15
• Status Verified: 2017-01
• Study First Submitted QC: 2017-01-10
• Study First Posted: 2017-01-12
• Last Update Submitted: 2017-01-24
• Last Update Posted: 2017-01-25

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 31

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Sugar Pill	Sugar Pill	Maltodextrin (\~2 grams to match weight of active treatment) placebo pre-testing (1 dose w/3 oz of water) 30 minutes following ingestion exercise and Makoto testing were completed.
Caffeine Blend	Caffeine Blend	75 mg caffeine, 75 mg theanine, and 2g tyrosine pre-testing (1 dose w/3 oz of water) 30 minutes following ingestion exercise and Makoto testing were completed.

Primary Outcome Measures

Name	Time	Method
Response to Caffeine on Measures of Cognitive Fatigue by Survey in Athletic Populatons	up to 4 hours	The primary purpose of this investigation is to determine if acute ingestion of a proprietary supplement containing caffeine, theanine, and tyrosine has any positive effects on markers of cognitive fatigue in athletic populations.
Response to Caffeine on Measures of Reaction Time by Makoto	up to 4 hours	The primary purpose of this investigation is to determine if acute ingestion of a proprietary supplement containing caffeine, theanine, and tyrosine has any positive effects on markers of reaction time in athletic populations.
Response to Caffeine on Measures of Mental Performance by Survey in Athletic Populatons	up to 4 hours	The primary purpose of this investigation is to determine if acute ingestion of a proprietary supplement containing caffeine, theanine, and tyrosine has any positive effects on markers of mental performance in athletic populations.

Secondary Outcome Measures

Name	Time	Method
Response to Caffeine on Measures of Physical Performance by Comparing the Total Amount of Work Completed	up to 4 hours	The secondary purpose of this investigation is to determine if acute ingestion of a proprietary supplement containing caffeine, theanine, and tyrosine has any positive effects on markers of physical performance in athletic populations.

Trial Locations

Locations (1)

UMHB Human Performance Lab; 🇺🇸 Belton, Texas, United States