Betalains have well-known antioxidant and anti-inflammatory properties. Recent investigations examining the effects of a betalain-rich concentrate (BRC) on exercise and recovery performance show promise of BRC as an ergogenic aid. To date, no study has examined the effects of a single dose of a BRC on supramaximal performance and recovery. Therefore, the purpose of this study is to examine the effects of an acute dose of BRC on repeated-sprint cycling performance and recovery.
Healthy, recreationally active males and females
Aged 18-40
Free of disease or injury
Have any musculoskeletal injuries that could be made worse by participating in this study (e.g., sprain or strain of lower limb)
Have documented medical conditions (i.e., hypertension, asthma, heart disease, diabetes) or exhibit signs and symptoms of medical conditions
Taking any medication that would interfere with the interpretation of our results. These include, but are not limited to, anti-inflammatory drugs, antibiotics, anti-hypertensives, and any medicine controlling the digestive system.
Crossover
Betalain-rich concentrate (AltRed)
Dietary supplementA single dose of 100 mg (2 x 50 mg) 120 min before exhaustive exercise. Supplement instructions: All treatments will be administered in similar capsules (smell, color, and size) to ensure both the participants and researcher are blinded to the treatment. All treatments will be administered in an opaque lidded container. The participants will be instructed to close their eyes and carefully open the container, keeping their heads forward. They will be asked to place the container to their lips, tipping the container to pour the contents into their mouth. Immediately after, they will be instructed to drink water to help them swallow the pill and instructed not to chew or manipulate the pill inside their mouth.
Placebo
Other interventionA single dose (2 x empty capsules) 120 min before exhaustive exercise. Supplement instructions: All treatments will be administered in similar capsules (smell, color, and size) to ensure both the participants and researcher are blinded to the treatment. All treatments will be administered in an opaque lidded container. The participants will be instructed to close their eyes and carefully open the container, keeping their heads forward. They will be asked to place the container to their lips, tipping the container to pour the contents into their mouth. Immediately after, they will be instructed to drink water to help them swallow the pill and instructed not to chew or manipulate the pill inside their mouth.
Repeated Sprint Performance
Absolute and relative measures of peak, average, and minimum power (Watts). Also, the time to peak power and average power during the first and second half of each 30 s sprint.
Repeated Sprint Performance
Fatigue index (%)
Neuromuscular Fatigue
Countermovement Jump (average of three jumps; cm)
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