Clinical trial NCT01705951: Effect of Resistance Training on Tobacco-Related Cardiovascular Disease Risk
Official title: Effect of Resistance Training on Tobacco-Related Cardiovascular Disease Risk
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Smoking
Cardiovascular Disease Risk
Keywords: Smoking
Insulin resistance
Metabolic Syndrome
Endothelial Function
Smoking Cessation
Resistance Training
Nicotine Replacement
Exercise
Cardiovascular Disease
Arterial Stiffness
Body Composition
Lead sponsor: University of California, Los Angeles
Sponsor class: OTHER
Collaborators: name: University of California
First posted: 2012-10-12
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: FACTORIAL
Primary purpose: TREATMENT

Brief summary: This project is prompted by the urgent public health need to identify novel strategies to prevent and treat tobacco-related cardiovascular disease (CVD) and by compelling pilot data that suggests cessation of smoking results in rapid amelioration of endothelial function. The higher prevalence of CVD and metabolic syndrome in smokers have become major health care concerns. Therefore, finding optimal intervention strategies to combat these growing epidemics is imperative. We are investigating the efficacy of resistance training to ameliorate endothelial dysfunction, oxidative stress, inflammation, and insulin resistance in four groups: presence or absence of resistance training with or without cessation treatment + nicotine replacement.

The investigators hypothesize that resistance training will improve cardiovascular function in smokers; however, the responses will be better in those who also stop smoking. In addition, resistance training will decrease smoking, however, the effects of counseling and nicotine replacement alone or counseling and nicotine replacement in conjunction with resistance training will be better than resistance training alone.

Detailed description: The investigators are conducting a 12-week randomized-controlled trial of 100 young adult smokers.

At week 0, participants attend three outpatient visits at baseline. Each participant is randomized to one of four groups: Resistance Training(RT)/Nicotine Replacement Therapy (NRT), RT/No NRT, No RT/NRT, and No RT/No NRT. Those receiving RT work with a certified personal trainer 3 times per week for 12 weeks at 60 minutes each session. Those receiving NRT use the nicotine patch daily for 12 weeks and call the California Smoker's Helpline for smoking cessation counseling. Those in the control group do not receive any intervention and maintain their current lifestyle and habits.

At week 13, participants return for three post-intervention assessments.

At week 26, survey data is collected to assess changes in lifestyle habits.

Eligibility criteria: Inclusion Criteria:

* Young Adults (18-35 yrs.)
* Male and female smokers
* Smokers (smoked at least one cigarette a day for 15 or more days in the last month and has smoked 100 cigarettes in life)
* 1-3 years experience consistently exercising/training at ≤2 days/wk of RT and ≤1 day/wk of aerobic exercise
* Capable of providing informed consent
* UCLA students/staff and Non UCLA student/staff
* Participant in good health as determined by baseline visit

Exclusion Criteria:

* Documented CAD
* Has had cardiac surgery
* Currently in weight loss or exercise program in the 6 months prior to participation.
* Use of medications that influence CV function or preclude the ability to train
* Syndromes or prescribed medications that may influence CVD, body composition, or insulin action (e.g. prednisone, Ritalin, Adderall, GH)
* Unable to exercise
* Diagnosed with syndromes or diseases that may influence body composition and CV risk (e.g. Cushing syndrome).
* Known heart arrhythmia and/or abnormalities found in electrocardiogram (ECG) reading that would prevent someone from performing the exercise intervention. If the subject demonstrates abnormal ECG during their pre-intervention visit (or any follow-up visit) the subject's ECG will be reviewed (for approval) by a cardiologist to continue in the study.
* Pregnant
* Use of hormonal contraceptives
* Currently in a smoking cessation program including use of NRT within the month of participation

Primary outcomes:
measure: Endothelial function as determined by brachial artery Flow-Mediated Dilation (FMD)
timeFrame: 12 weeks
Secondary outcomes:
measure: Smoking cessation percentage
timeFrame: 12 weeks
measure: Arterial stiffness (including PWV and AIx)
timeFrame: 12 weeks
measure: Number of cigarettes smoked
timeFrame: 12 weeks
Other outcomes:
measure: Endothelial Progenitor Cells (EPC) count
timeFrame: 12 weeks
measure: Insulin sensitivity by Frequently Sampled Intravenous Glucose Tolerance Test (FSIVGTT)
timeFrame: 12 Weeks
measure: Plasma biomarkers inflammation/oxidative stress (oxidized low density lipoprotein (OxLDL), CRP)
timeFrame: 12 Weeks
measure: Body Composition
timeFrame: 12 Weeks
measure: Muscle Strength
timeFrame: 12 Weeks
Locations:
city: Los Angeles
country: United States
facility: University of California, Los Angeles
state: California
Study officials:
affiliation: University of California, Los Angeles
name: Christian K Roberts, Ph.D
role: PRINCIPAL_INVESTIGATOR
References: