Acute Effects of Beetroot Juice and Caffeine Co-ingestion on Lower-limb Strength and Muscular Endurance in Females
NCT ID: NCT06758323
Last Updated: 2025-01-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
15 participants
INTERVENTIONAL
2024-08-01
2024-12-26
Brief Summary
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* Does the co-ingestion of beetroot juice and caffeine enhance lower-limb strength and muscular endurance more than either substance alone or a placebo?
* How do the acute effects of beetroot juice interact with caffeine on physical performance?
The study was conducted using a randomized, crossover design to evaluate the following four conditions:
Beetroot juice with placebo Caffeine with placebo Beetroot juice with caffeine Placebo only
Each participant completed all conditions, with a sufficient washout period between sessions to eliminate potential carryover effects. This design allowed for a direct comparison of the acute effects of each supplementation strategy on lower-limb strength and muscular endurance.
Participant Protocol
Participants consumed their assigned supplement on a single testing day for each condition. After supplementation, they performed standardized tests to measure lower-limb strength and muscular endurance. Progress was monitored, and data from all conditions were collected to assess the acute effects of each intervention.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
CROSSOVER
OTHER
DOUBLE
Study Groups
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COM
Beetroot juice combined with caffeine
Beetroot juice combined with caffeine (COM)
* 70 mL of beetroot juice (400 mg NO3-, BEET It Sport; James White Drinks Ltd) 120 minutes before experimental session
* 200 mg caffeine capsule from the IO.GENIX Nutrition brand (Toledo, Spain) 60 minutes before experimental session
CAF
Beetroot juice placebo with caffeine
Beetroot juice placebo with caffeine (CAF)
\- 70 mL of a blackcurrant beverage, which depletes NO3- (Capri-Sun) 120 minutes before experimental session - 200 mg caffeine capsule from the IO.GENIX Nutrition brand (Toledo, Spain) 60 minutes before experimental session
BRJ
Beetroot juice with caffeine placebo
Beetroot juice with caffeine placebo (BRJ)
\- 70 mL of beetroot juice (400 mg NO3-, BEET It Sport; James White Drinks Ltd) 120 minutes before experimental session - Multivitamin capsule from NaturrTierra (Leganés, Spain) 60 minutes before experimental session
PLA
Beetroot juice placebo with caffeine placebo
Beetroot placebo with caffeine placebo (PLA)
\- 70 mL of a blackcurrant beverage, which depletes NO3- (Capri-Sun) 120 minutes before experimental session - Multivitamin capsule from NaturrTierra (Leganés, Spain) 60 minutes before experimental session
Interventions
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Beetroot juice combined with caffeine (COM)
* 70 mL of beetroot juice (400 mg NO3-, BEET It Sport; James White Drinks Ltd) 120 minutes before experimental session
* 200 mg caffeine capsule from the IO.GENIX Nutrition brand (Toledo, Spain) 60 minutes before experimental session
Beetroot juice placebo with caffeine (CAF)
\- 70 mL of a blackcurrant beverage, which depletes NO3- (Capri-Sun) 120 minutes before experimental session - 200 mg caffeine capsule from the IO.GENIX Nutrition brand (Toledo, Spain) 60 minutes before experimental session
Beetroot juice with caffeine placebo (BRJ)
\- 70 mL of beetroot juice (400 mg NO3-, BEET It Sport; James White Drinks Ltd) 120 minutes before experimental session - Multivitamin capsule from NaturrTierra (Leganés, Spain) 60 minutes before experimental session
Beetroot placebo with caffeine placebo (PLA)
\- 70 mL of a blackcurrant beverage, which depletes NO3- (Capri-Sun) 120 minutes before experimental session - Multivitamin capsule from NaturrTierra (Leganés, Spain) 60 minutes before experimental session
Eligibility Criteria
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Inclusion Criteria
* Be familiarized with the exercise test: counter movement jump (CMJ), barbell back squats, leg press and knee extension.
Exclusion Criteria
* Sports injuries
18 Years
35 Years
FEMALE
Yes
Sponsors
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Jose Manuel Jurado Castro
OTHER
Responsible Party
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Jose Manuel Jurado Castro
Principal Investigator
Locations
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Edificio IMIBIC Avda Menéndez Pidal s/n
Córdoba, , Spain
Countries
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Other Identifiers
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IMIBIC_BRJ_CAF
Identifier Type: -
Identifier Source: org_study_id
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