An interventional study of Group 5 STS and Group 10 STS in Quality of Life, Quality Muscle and Arquitecture Muscle, sponsored by Universidad de Granada. Completed at 1 site in Chile. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-03-02.
Sponsored by Universidad de Granada · Not applicable, Interventional, and Basic science
An 8-week intervention of the sit-to-stand test (STS) of 5 and 10 repetitions will be performed to two randomly selected groups to compare its effect on the muscle architecture of the vastus lateralis muscle.
H1: 10 STS significantly modifies vastus lateralis muscle architecture in adults compared to 5STS and the control group.
Participants will be required to attend the laboratory for a first familiarization visit, where descriptive, biometric, and medical variables will also be evaluated. In addition, during this first familiarization session, it will be previously determined if the participants present any exclusion criteria and their muscle architecture will also be evaluated. After the familiarization session and the participants have signed the informed consent form, they will be randomly assigned to a 5 STS, 10 STS, or control group. Each group (exception of the control group) will be asked to perform three times a week one of the STS modalities assigned to them for 8 weeks, to ensure that the test is completed correctly and also to maintain the planning, the evaluator will be connected virtually with the participants, where rest times will be controlled and a fatigue perception scale will be performed at the end of each session, which will allow controlling the process each session. Subsequently, participants will be asked to attend the laboratory to re-evaluate their architectural parameters ( pennation angle, fascicle length, and muscle thickness) of the quadriceps muscle, one week after performing the intervention.
Universidad de Granada is the lead sponsor of 241 studies on the registry; 41 are open to participants now.
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Exclusion Criteria:
Group 5 STS will perform the same protocol as group 10 STS, only the number of repetitions between each set will change.
Other: Group 5 STS
Group 10 STS will perform the same protocol as group 5 STS, only the number of repetitions between each set will change.
Other: Group 10 STS
Control group, no intervention.
For 8 weeks, 3 times per week and 3 sets of 5 repetitions during the first month, then 5 sets of 5 repetitions during the second month. Between each repetition, there will be a rest of 30 to 60 seconds approximately.
For 8 weeks, 3 times per week and 3 sets of 10 repetitions during the first month, then 5 sets of 10 repetitions during the second month. Between each repetition, there will be a rest of 30 to 60 seconds approximately.
Change in the pennation angle of the vastus lateralis muscle.
Calculated as the angle of insertion of the muscle fiber fascicles into the deep aponeurosis, measured with a linear probe in B-mode.
Time frame: Before, 1 week completion of the intervention.
Change in the length of the fascicle of the vastus lateralis muscle
is calculated by measuring the length of the fascicular pathway between the superficial and deep aponeuroses,measured with a linear probe in B-mode.
Time frame: Before, 1 week after completion of the intervention.
Change in vastus lateralis muscle thickness
Muscle thickness will be determined as the distance between the superficial aponeurosis to the deep aponeurosis, measured with a linear probe in B-mode.
Time frame: Before, 1 week after completion of the intervention.
Change in muscle quality index (MQI)
Was calculated using two different formulas: one proposed by Takai et al. And one by Fragala et al. The "Takai formula" considers the time required to perform ten repetitions of the sit-to-stand test, while the "Fragala formula" uses the time required for five repetitions: MQI = ((leg length x chair height) x body mass x gravity x 10/ Time STS). Both calculations consider the length of the leg in meters, the height of the chair used in the test, body mass in kilograms, acceleration due to gravity (9.81 m/s\^2), and a fixed constant of 10.
Time frame: Before, 1 week after completion of the intervention.
Change in STS mean velocity (m· s-1), STS mean force (N), STS mean power (W), and STS relative power (W·Kg-1)
The STS mean velocity (m· s-1), STS mean force (N), STS mean power (W), and STS relative power (W·Kg-1), were calculated with the formulas proposed by Alcazar et al. The formulas are as follows: 1. STS mean velocity = \[0.5 x Height - Chair height\] / Five STS time × 0.1\] 2. STS mean force = 0.9 x g x Body mass 3. STS mean power = Body mass x 0.9 x g x \[Height x 0.5 - Chair height / Five STS time × 0.1\] 4. Relative STS mean power = 0.9 x g x Height \[ 0.5 x Chair height\] / Five STS time × 0.1\]
Time frame: Before, 1 week after completion of the intervention.
Plan to share: No
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Universidad de Granada