Circulatory Levels of Irisin in Response to Acute Resistance Training

Texas Tech University28 enrolled

Overview

Study the circulatory levels of irisin in response to one session of high-intensity resistance training in a group of healthy subjects.

Objective: The purpose of this study is to study the circulating levels of irisin in response to acute high-intensity resistance training in a group of healthy young adults. Sample: The sample will be comprised of adult men and women unpaid volunteers between the ages of 18 and 30. We will recruit 44 participants. Pre- screening assessments: Informed consent, PAR-Q, Medical History and Exercise History will be used to determine health status and prior exercise experience. Menstrual cycle log will be required for female participants. Pre-Intervention assessments (baseline): * Anthropometric measurements and Body Composition: Height, triceps, thigh and calf skinfolds, biceps, thigh, hip, waist, and calf circumferences will be measured. Dual-energy x-ray absorptiometry (DEXA) will be performed to obtain body composition. * Blood-related variables. Baseline glucose, lactate and hematocrit will be obtained from all participants prior to intervention. Lactate and Hematocrit will be obtained pre-intervention and post-intervention, and within 1 min post workout. Irisin will be obtained from blood samples at baseline, during and after the training session. Irisin will be measured via a commercial enzyme-linked immunosorbent assay. * Cardiopulmonary and Strength Fitness Testing. Cardiopulmonary fitness will be determined via maximum oxygen consumption testing. One maximum repetition (1-RM) will be used to assess the muscular fitness. * Dietary Controls. Each participant will complete the Food Preference Questionnaire. In addition, the Automated Self-Administered 24-hour Recall (ASA24) will be collected for the day prior to the session. * Familiarization. Participant will be instructed on the muscle conditioning techniques used for strength training so that the techniques can be mastered. The rate of perceived exertion (RPE) scale will also be used for familiarization during these sessions. * Spontaneous Physical Activity: Daily activity level for 7 days will be collected. Intervention: Resistance training will consist on a circuit training of 3 sets of 7 exercises focused on major muscle groups. Ten repetitions on each circuit at 70% of the maximum capacity will be performed. Acute intervention will consist of one session. Blood will be collected pre-session, at 45 min during the session, and immediately after the acute intervention exposure (post-session).

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Healthy

Interventions

exercise trainingOTHER

high-intensity resistance training

Eligibility

Sex: ALLMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Participants between 18 and 30 years old * Males and Females * Healthy Exclusion Criteria: * Participants with known health problems such as cardiovascular, pulmonary or metabolic disease will be excluded. * Pregnant females will be excluded from the study. * Any adults found taking medications that affect endocrine or cardiovascular function will also be excluded from the study. * Individuals found to be less than 110 pounds will also be excluded due to the collection of blood during this study. * Participants that exercise more than three times per week or strength train more than twice per week will be excluded. * Individuals that have poor venous access or have expressed a fear of needles or having blood taken will also be excluded. * Cigarette smoking (current or those who quit within the previous 6 months * Hypertension * Overweight and obese * Pre-diabetics

Locations (1)

Exercise and Sport Sciences Building

Lubbock, Texas, United States

Outcomes

Primary Outcomes

Serum irisin levels

Changes in irisin levels baseline, 45 min (during the training session), and post-training session

Time frame: 1 day

Secondary Outcomes

Body composition assessment, as measured by DEXA and anthropometry

Body composition at baseline prior to the training session

Time frame: 1 day

Lactate levels

Intensity of exercise at the end of the session (post-training session)

Time frame: 1 day

Physical Fitness levels as measured by 1 RM (repetition maximum) and Cardio-respiratory maximal test

Physical Fitness levels at baseline prior to the training session

Time frame: 1day

Blood Glucose levels

Blood Glucose levels at baseline prior to the training session

Time frame: 1 session (1 day)

Diet assessment: 24 hour recall and Food Preference Questionnaire

Dietary habits at baseline prior to the training session

Time frame: 1day

Hematocrit concentration

Hematocrit levels at baseline and post-training session

Time frame: 1 day

Physical Activity assessment, as measured by Accelerometry.

Quantification of baseline Physical Activity levels at baseline prior to the training session

Time frame: 1 week

Data from ClinicalTrials.gov

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