Autonomic Modulation Recovery After Acute Resistance Exercise

Study Overview
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Brief Summary
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To analyze the autonomic behavior in recovery post-acute resistance exercise performed in different intensities and body segments.

Detailed Description
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Resistance training (RT) is recommended to people with different health condition. RT is recognized as safe and effective method of increasing muscle strength, physical fitness, muscle mass, and overall cardiovascular health. The magnitude of the RT effects is associated with the structure of the training program. Understanding these aspects may provide guidance for the RT prescription while reducing potential risk of cardiovascular events associated with the recovery period after exercise. The objective of the study is to compare the acute responses of the Autonomic Nervous System post RT performed with different intensities (endurance and strength) in different body segments (UL and LL). Our hypothesis is that different intensities and body segments influence the acute responses of the ANS in the post RT recovery period.

Official Title
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Autonomic Modulation Recovery After Acute Resistance Exercise in Different Intensities and Body Segments

Conditions
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Resistance Training

Intervention / Treatment
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* Other: Resistance Training - UL endurance protocol
* Other: Resistance Training - UL strength protocol
* Other: Resistance Training - LL endurance protocol
* Other: Resistance Training - LL strength protocol


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Graduate students, Age between 18 to 30 years Healthy men, the Physical Activity Readiness Questionnaire (PAR-Q) was used to determine safety and possible risk of exercising based on participants' health history, the according American College of Sports Medicine, 2010. Trained men, the International Physical Activity Questionnaire (IPAQ) was used to determine participants' physical activity level. Exclusion Criteria: Participants who did not attend all the RT protocols and those with HR record with error higher than 5% (ectopic beats) will be excluded. -

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Interventional Model Description: This study is a cross-over clinical trial
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: upper limb endurance protocol<br>UL endurance protocol - elbow flexion | Other: Resistance Training - UL endurance protocol<br>* UL endurance protocol - 2 series of 20 repetitions, elbow flexion at 40% of the maximum test force of 1 maximum repetition, (recovery 1 minutes between sets).<br>|
| Active Comparator: upper limb strength protocol<br>UL strength protocol - elbow flexion | Other: Resistance Training - UL strength protocol<br>* UL strength protocol - 2 series of 8 repetitions, elbow flexion at 80% of the maximum test force of 1 maximum repetition, (recovery 1 minutes between sets).<br>|
| Active Comparator: lower limb endurance protocol<br>LL endurance protocol - knee extension | Other: Resistance Training - LL endurance protocol<br>* LL endurance protocol - 2 series of 20 repetitions, elbow flexion at 40% of the maximum test strength of 1 maximum repetition, (recovery 1 minutes between sets).<br>|
| Active Comparator: lower limb strength protocol<br>LL strength protocol - knee extension | Other: Resistance Training - LL strength protocol<br>* LL strength protocol - 2 series of 8 repetitions, knee extension at 80% of the maximum test force of 1 maximum repetition, (recovery 1 minutes between sets).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Acute responses of the Autonomic Nervous System post Resistance Training of the time-domain indices of Heart Rate Variability | Understand the effect of acute responses of the time-domain indices of Heart Rate Variability, RMSSD, and SDNN, comparing the behavior of these indices of in rest periods and immediate recovery after effort. Besides, to analyze the changes observed when applying different training intensities (endurance protocol 40% 1RM, and strength protocol 80% 1 RM) and body segments (elbow flexion [UL] and knee extension [LL]). RMSSD: root mean square of the successive differences between the RR intervals in the record, divided by the number of RR intervals in a given time minus one RR interval SDNN: standard deviation of all normal RR intervals. | the moments before and immediately after Resistance Training, performed with different intensities (endurance and strength) and body segments (UL and LL). | 
| Acute responses of the Autonomic Nervous System post Resistance Training of the geometric indices of Heart Rate Variability | Understand the effect of acute responses of the geometric indices of Heart Rate Variability, SD1, SD2, comparing the behavior of these indices of in rest periods and immediate recovery after effort. Besides, to analyze the changes observed when applying different training intensities (endurance protocol 40% 1RM, and strength protocol 80% 1 RM) and body segments (elbow flexion [UL] and knee extension [LL]). SD1: standard deviation of diagonal points SD2: standard deviation from longitudinal points | the moments before and immediately after Resistance Training, performed with different intensities (endurance and strength) and body segments (UL and LL). | 
| Acute responses of the Autonomic Nervous System post Resistance Training of the frequency domain of Heart Rate Variability, | Understand the effect of acute responses of the frequency domain of Heart Rate Variability, LF anf HF, both calculated in absolute (ms2) and normalized units (nu), comparing the behavior of these indices of in rest periods and immediate recovery after effort. Besides, to analyze the changes observed when applying different training intensities (endurance protocol 40% 1RM, and strength protocol 80% 1 RM) and body segments (elbow flexion [UL] and knee extension [LL]). LF: spectral components of low frequency, 0.04 - 0.15Hz HF: spectral components of high frequency, 0.15 - 0.40 Hz | the moments before and immediately after Resistance Training, performed with different intensities (endurance and strength) and body segments (UL and LL). | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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exercise, resistance training, autonomic modulation, heart rate