Introduction: studies on resistance training of low intensity associated with blood flow restriction in recent years, although there are still gaps that can be explored in relation to their physiological phenomena when associated with eccentric training. In this way, from there the exploration becomes relevant the investigation of eccentric training associated to an RFS. Objective: To analyze and compare the effects of a high intensity and low intensity intensive resistance training associated with an RFS (TREAI-RFS and TREBI-RFS) with a high intensity eccentric resistance training without RFS (TREAI) in knee extensors. Method: The study will consist of 45 male participants, allocated from a stratified randomization into three groups: TREAI (n = 15), TREAI-RFS (n = 15) and TREBI-RFS (n = 15). Participants underwent a training program with a minimum of 40% without RFS, 80% with RFS and 40% with CVS of CVIM, 3 times a week, and the outcomes of muscle strength, muscle structure, power test and Endothelial growth will be assessed one week before, the fourth week and one week after the end of the training program. In addition, clinical markers of perception and recovery effort are investigated before and after a session. The graph used is descriptive and descriptive, as it is used as a model of analysis of variance for the analysis of replications without a two-factor scheme, which provides detailed information on how the measures are repeated, neither. A whole statistical analysis can reach the level of significance of 5%.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
61
High intensity eccentric training group with 80% of isometric peak torque.
Eccentric high intensity training group with 80% of isometric peak torque associated with blood flow restriction (40% of absolute occlusion pressure).
Low intensity eccentric training group with 40% of isometric peak torque associated with blood flow restriction (40% of absolute occlusion pressure).
Low intensity eccentric training group with 40% of isometric peak torque
Franciele Marques Vanderlei
Presidente Prudente, São Paulo, Brazil
Change in muscle strength torque peaks at dinamometer isokinetic
The isometric, eccentric and concentric torque peaks will be measured with an isokinetic dynamometer in order to evaluate the adaptations of knee extensor force to eccentric training.
Time frame: baseline, fourth week and one week after sixth week
Change in muscular structure with ultrasonography
Ultrasonographic imaging of the dominant lower limb will be captured to determine muscle thickness of the vastus lateralis (VL) and rectus femoris (RF) muscles.
Time frame: baseline, fourth week and one week after sixth week.
Change in Vascular Endothelial Growth Factor (VEGF)
For the analysis of the concentration of endothelial growth factor (VEGF) will be collected 10 ml of blood sample. The plasma of this sample will be stored at -80 ° C for further analysis.
Time frame: baseline, fourth week and one week after sixth week.
Change in muscle power test
The strength and muscle power tests will be performed on a vertical squat with a guided bar.
Time frame: baseline, fourth week and one week after sixth week.
Pain threshold
To assess the pain threshold, the pressure algometer will be applied at five specific locations on the quadriceps.
Time frame: Assessed at baseline, 4th week, and 6th week.
Analog Visual Scale
The subjective evaluation of pain will be obtained through the Visual Analogue Scale (EVA), graded from 0 to 10, with zero being the total absence of pain and 10 the maximum level of pain supported by the participant.
Time frame: Assessed at baseline, 4th week, and 6th week.
Perceived Effort Scale (Borg)
The degree of subjective exertion reported by the participants in relation to the lower limbs will be analyzed by Borg's scale of perception of effort of 6 to 20 points, 6 being "very easy" and 20 being "exhaustive."
Time frame: Assessed at baseline, 4th week, and 6th week.
Recovery Perception Scale
The perception of recovery of the lower limb submitted to the eccentric exercise protocol will be evaluated by means of a 10-point Likert Scale, where 1 indicates "not recovered" and 10 "fully recovered".
Time frame: Assessed at baseline, 4th week, and 6th week.
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