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Test the short-term effects of the acute consumption of two separate beverages containing different concentrations of polyphenols, a beverage containing 75 mg of caffeine and a flavored placebo beverage on mental energy and physical performance
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Flavored Beverage Mix 1 | Placebo Comparator | Flavored still beverage |
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| Flavored Beverage Mix 2 | Experimental | Flavored still beverage with polyphenols, concentration 1 |
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| Flavored Beverage Mix 3 | Experimental | Flavored still beverage with polyphenols, concentration 2 |
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| Flavored Beverage Mix 4 | Experimental | Flavored still beverage with caffeine |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Flavored beverage | Other | Consume one beverage at the beginning of each visit of the cross-over sequence |
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| Measure | Description | Time Frame |
|---|---|---|
| Subjective mental energy: Cognitive test battery | Changes in subjective measures of mental alertness and mental fatigue through computer administered cognitive test battery domains of short-term memory, attention and mood. Tasks are word presentation, word recognition, picture presentation, picture recognition, Cognitive Demand Battery (CDB) serial 3 and serial 7 subtraction, and Bakan task/Rapid Visual Information Processing (RVIP). Performance measures: % correct, % errors and response time in milliseconds. | Baseline and 60 min post treatment |
| Subjective mental energy: VAS for mental alertness | Changes in subjective ratings of mental alertness following computer administered cognitively fatiguing tasks. Visual Analog Scale (VAS) for mental alertness has the score range 0-100 (from not at all to extremely). | Baseline and 60 min post treatment |
| Subjective mental energy: VAS for motivation | Changes in subjective ratings of motivation following computer administered cognitively fatiguing tasks. Visual Analog Scale (VAS) for motivation has the score range 0-100 (from not at all to extremely). | Baseline and 60 min post treatment |
| Subjective mental energy: VAS for mental fatigue | Changes in subjective ratings of fatigue following computer administered cognitively fatiguing tasks. Visual Analog Scale (VAS) for fatigue has the score range 0-100 (from not at all to extremely). | Baseline and 60 min post treatment |
| Subjective mental and physical energy: VAS for mental and physical state and trait energy and fatigue (EFS State Scales) | Changes in subjective ratings of mental alertness, motivation and fatigue following computer administered cognitively fatiguing tasks. Mental and Physical State and Trait Energy and Fatigue Scales (EFS State Scales) consist of 12 VAS items to measure intensity of current feeling of physical energy and fatigue and mental energy and fatigue (3 sub-scales each). Score range: The 3 items from each sub-scale are summed and scores for each sub-scale range from 0-300 (none to strongest). |
| Measure | Description | Time Frame |
|---|---|---|
| Physical performance | Mean power output in a timed cycling trial following post-treatment cognitive test battery and caffeine symptom VAS. | During the last 3 minutes of 23 min high intensity cycling exercise (10 x 1 min work intervals each followed by 1 min rest. No rest after final interval, 3 min max power from minutes 20-23. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Patrick J O'Connor, PhD | University of Georgia | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Georgia | Athens | Georgia | 30602 | United States |
IPD will be kept securely at U. Georgia for several years and can be accessed upon request by contacting Dr. Pat O'Connor (poconnor@uga.edu)
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After publication
Open access, upon request
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| ID | Term |
|---|---|
| D009043 | Motor Activity |
| D005221 | Fatigue |
| ID | Term |
|---|---|
| D001519 | Behavior |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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Double-blind
| Baseline and 60 min post treatment |
| Subjective mental energy: VAS for mood | Changes in subjective ratings of mental alertness, motivation and fatigue following computer administered cognitively fatiguing tasks. The Bond-Lader test uses 16 Visual Analog Scales (VAS) to measure different aspects of mood, with score range 0-100 for each scale (from absence of feeling to presence of feeling). | Baseline and 60 min post treatment |
| Subjective mental energy: VAS for caffeine symptoms | Changes in subjective ratings of mental alertness, motivation and fatigue following computer administered cognitively fatiguing tasks. Caffeine symptoms are measured on paper using 8 Visual Analog Scales (VAS) with score range 0-100 (from not at all to extremely). | Baseline and 60 min post treatment |
| Physical Fatigue |
Subjective categorical scale, score range 0-7, higher score indicates greater feeling of physical fatigue |
| After each of 10 1-minute high intensity cycling intervals separated by 1 min rest and at end of exercise. |
| Alertness | Subjective categorical scale, score range 1-7, higher score indicates greater alertness meaning a greater feeling of energy | After each of 10 1-minute high intensity cycling intervals separated by 1 min rest and at end of exercise. |
| Effort | Subjective categorical scale, Borg Ratings of Perceived Exertion (RPE) measures perception of effort, score range 6-20. Higher score indicates greater effort. 17 or greater generally indicates maximal effort | After each of 10 1-minute high intensity cycling intervals separated by 1 min rest and at end of exercise. |
| Quadriceps muscle pain | Subjective categorical scale with ratio-like properties, scale 0-10 with open-ended option for ratings greater than but proportional to 10. Higher scores indicate greater perception of pain in the quadriceps | After each of 10 1-minute high intensity cycling intervals separated by 1 min rest and at end of exercise. |