Impact of Coffeeberry Extract on Skill Performance During Simulated Match Play in Academy Football Players
Study Details
Study Description
Brief Summary
This study of soccer skill performance has three objectives:
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Compare effects of coffeeberry (300mg) and placebo ingestion on dribbling speed and precision, passing speed and accuracy, and sprint speed during a full simulated soccer match.
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Compare effects of coffeeberry (300mg) and placebo ingestion on subjective measures (mental / physical energy and activation-deactivation (feelings or mood) during a full simulated soccer match.
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Compare effects of coffeeberry (300mg) and placebo ingestion on chlorogenic acid (CGA) and caffeine metabolites in the blood 1-hour post ingestion, and other blood metabolites (glucose/lactate) throughout the simulated soccer match.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Coffeeberry beverage 300 ml drink containing 300 mg coffeeberry extract |
Other: Beverage
Free from added carbohydrates (contain 1g CHO only) and electrolytes are absent.
|
| Placebo Comparator: Color and flavor matched beverage 300 ml drink (0 mg coffeeberry extract, 0 mg caffeine) |
Other: Beverage
Free from added carbohydrates (contain 1g CHO only) and electrolytes are absent.
|
Outcome Measures
Primary Outcome Measures
- Dribbling speed [Change from pre-dose baseline through end of match 3.5 hours post consumption at multiple intervals each half of match]
m/sec, increase would be better. Simulated soccer match in an indoor gym with pre-set targets.
- Dribbling precision [Change from pre-dose baseline through end of match 3.5 hours post consumption at multiple intervals each half of match]
Meters, more accuracy would be better. Simulated soccer match in an indoor gym with pre-set targets.
- Passing accuracy [Change from pre-dose baseline through end of match 3.5 hours post consumption at multiple intervals each half of match]
1-10 scale, higher score would be better. Simulated soccer match in an indoor gym with pre-set targets.
- Passing speed [Change from pre-dose baseline through end of match 3.5 hours post consumption at multiple intervals each half of match]
km/h, increased would be better. Simulated soccer match in an indoor gym with pre-set targets.
- Sprint speed. [Change from pre-dose baseline through end of match 3.5 hours post consumption at multiple intervals each half of match]
m/sec, increase would be better. In indoor gym with marked course.
Secondary Outcome Measures
- Blood analyte: Chlorogenic acid (CGA) [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
mmol/L to evaluate primary outcomes. n.a. for placebo. Capillary blood draw for frozen plasma analysis
- Blood analyte: Caffeine metabolites [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
ug/ml, to evaluate primary outcomes. n.a. for placebo. Capillary blood draw for frozen plasma analysis
- Blood analyte: Glucose [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
mmol/L, more regulated would be better. Capillary blood draw for frozen plasma analysis
- Blood analyte: Lactate [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
mmol/L, lower (delayed rise) would be better. Capillary blood draw for frozen plasma analysis
- Rating of perceived exertion (RPE) [Half-time and end of match (3.5 hours)]
By Borg scale, rated 6-20, very very light to very very hard. Lower values would be better
- Activation-deactivation (feelings or mood) [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
Checklist of 20 feelings using a 4 point scale from definitely do feel to definitely don't feel. More relaxed and better mood would be better.
- Mental energy [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
Visual Analog Scale (VAS), vertical marking on 100 mm horizontal line. Higher energy would be better
- Physical energy [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
Visual Analog Scale (VAS), vertical marking on 100 mm horizontal line. Higher energy would be better
- Gut comfort [Pre-dose baseline, 60 minutes post-dose, half-time, and end of match (3.5 hours)]
Visual Analog Scale (VAS), vertical marking on 100 mm horizontal line. No or less nausea, fullness or bloating would be better
- Heart rate [Continuous from pre-dose baseline through end of match (3.5 hours)]
By electronic reading. Lower would be better.
- Hydration status [Pre-dose baseline and end of match (3.5 hours)]
Urine osmolality in mOsm/kg change in concentration pre- vs. post-exercise
Eligibility Criteria
Criteria
Inclusion Criteria:
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Provide valid informed consent prior to any study procedure
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Male soccer players age 16 to 28 years.
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= 5-year soccer playing experience
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= 1-year regularly soccer training
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Free of injuries
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Willing to avoid alcohol in the 48-h period prior to all visits
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Willing to avoid caffeinated products and apples, berries/cherries for 24-h prior to all visits
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Willing to record food intake over the 48-h period prior to the first trial and replicate for second trial
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Willing to abstain from strenuous physical activity for 24-h before all visits
Exclusion Criteria:
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Smoking
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Cardiovascular diseases
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Diabetes or other metabolic disease • Hypertension (>140/>90 mm Hg)
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Presence of injuries
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Major illnesses or surgery in prior 90 days
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Participation in another clinical trial in the past month
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | U. Stirling, Health Science and Sport | Stirling | Scotland | United Kingdom | FK9 4LA |
Sponsors and Collaborators
- PepsiCo Global R&D
Investigators
- Principal Investigator: Stuart Galloway, PhD, U. Stirling, Scotland
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- PEP-2114