Muscular Endurance
Conditions
Keywords
Explosive force production, Beetroot juice, Beetroot, muscular endurance
Brief summary
This study aims to evaluate the effects of beetroot juice supplements on lower-limb strength and muscular endurance in physically active women, due to the presence of NO3- in beetroot juice.
Detailed description
Beetroot juice (BJR) is used as an ergogenic aid, but no study has analyzed its' effects on explosive force production in physically active women. It has been proposed that females could blunt reduction of NO2- to NO based on a higher oxidative skeletal muscle phenotype than males. However, it has been observed a higher increase on plasma NO2- levels after supplementation compared to and a greater enhancement on muscle contractile function. Based on the absence of any study that has analyzed the effect of NO3- supplements on jump ability and power production on weightlifting on female population; the purpose of this study will be to investigate the possible ergogenic effect of BJR on physically active women on explosive force production and muscular endurance in a lower-limb body weightlifting protocol, due to the presence of NO3- in BJR and its effects.
Interventions
DIETARY_SUPPLEMENTBeetroot juice
Subjects will drink juice 120 minutes before each visit
OTHERCapri-Sun
70 mL of blackcurrant beverage, which is depleted of NO3- will be taken 120 min before each visit.
Sponsors
Maimónides Biomedical Research Institute of Córdoba
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
DOUBLE (Subject, Investigator)
Masking description
The order in which the participants will consume one supplement or another will be assigned randomly and double blind by an external collaborator to the research team, who will be responsible for coding the bottles.
Intervention model description
The experimental procedure will consist of three visits, separate from each other by one week, to achieve the total elimination of any effects caused by BJR as well as the optimal recovery of the participants.
Eligibility
Sex/Gender
FEMALE
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* Physically active females with 18-30 years of age * More than 6 months on RT training programs * Be familiarized with back squat, leg press and leg extension exercises * Not consuming any type of nutritional supplement or anabolic substances in the previous three months or during the study * Not suffering from a musculoskeletal injury that could interfere with the exercise protocol during the investigation
Exclusion criteria
* None
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change of height reached in jump | Week 1, 2 and 3. | Evaluated through CMJ (Counter movement jump) test with a recovery period of 45 seconds between jumps. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Movement velocity | Visit 1 (week 1), 2 (week 2) and 3 (week 3). | Evaluated at 50% and 75% repetition maximum (RM) |
| Power on back squat | Visit 1 (week 1), 2 (week 2) and 3 (week 3). | Evaluated at 50% and 75% repetition maximum (RM) |
| Muscular endurance test | Visit 1 (week 1), 2 (week 2) and 3 (week 3). | The test consists of three exercises: back squat, leg press and leg extension. Three series will be performed until concentric failure at 75% RM, three minutes of rest between each series. |
| Rating of perceived exertion (RPE). | Visit 1 (week 1), 2 (week 2) and 3 (week 3). | Immediately at the end of the muscular endurance test, participants will be instructed to report their RPE using a scale 1-10 (worse to better outcome). |
Countries
Brazil, Spain
Outcome results
None listed