Exercise, Statins, and the Metabolic Syndrome

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

121 participants

Study Classification

INTERVENTIONAL

Study Start Date

2007-05-31

Study Completion Date

2011-05-31

Brief Summary

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Here we tested if statins or exercise plus statins had a greater capacity to lower metabolic syndrome risk factors in sedentary individuals with at least 2 metabolic syndrome risk factors. We also examined if statins impacted exercise response for mitochondrial content in muscle or aerobic fitness.

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Detailed Description

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OBJECTIVES: Determine if simvastatin impairs exercise training adaptations.

BACKGROUND: Statins are commonly prescribed in combination with therapeutic lifestyle changes, including exercise, to reduce cardiovascular disease risk in patients with the metabolic syndrome. Statin use has been linked to skeletal muscle myopathy and impaired mitochondrial function, but it is unclear whether statin use alters adaptations to exercise training.

METHODS: We examined the effects of simvastatin on changes in cardiorespiratory fitness and skeletal muscle mitochondrial content in response to aerobic exercise training. Sedentary overweight or obese adults with at least 2 metabolic syndrome risk factors (defined according to National Cholesterol Education Panel Adult Treatment Panel III criteria) were randomized to 12 weeks of aerobic exercise training or to exercise in combination with simvastatin (40 mg per day). The primary outcomes were cardiorespiratory fitness and skeletal muscle (vastus lateralis) mitochondrial content (citrate synthase enzyme activity).

Conditions

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Metabolic Syndrome Obese Sedentary

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Statin

Statins (40mg/day)for an average of 12 weeks

Group Type EXPERIMENTAL

Statin

Intervention Type DRUG

Statins (40mg/day)for 12 weeks

Exercise only

12 weeks of exercise training (5 days a week for 45-50 min a session)

Group Type EXPERIMENTAL

Exercise only

Intervention Type OTHER

12 weeks of exercise training (5 days a week for 45-50 min a session)

Statins + Exercise

Statins (40mg/day of simvastatin) plus exercise training (5 days/wk) for 12 weeks

Group Type ACTIVE_COMPARATOR

Statins + Exercise

Intervention Type OTHER

Statins (40mg/day of simvastatin) plus exercise training (5 days/wk for 45-50 min a session) for 12 weeks

Interventions

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Statin

Statins (40mg/day)for 12 weeks

Intervention Type DRUG

Exercise only

12 weeks of exercise training (5 days a week for 45-50 min a session)

Intervention Type OTHER

Statins + Exercise

Statins (40mg/day of simvastatin) plus exercise training (5 days/wk for 45-50 min a session) for 12 weeks

Intervention Type OTHER

Other Intervention Names

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simvastatin Physical activity Statins + Physical Activity

Eligibility Criteria

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Inclusion Criteria

* Sedentary metabolic syndrome subjects will be 25-59 y of age
* overweight to Class I or II obese (BMI 25-39 kg/m2) men and women
* 2 of 4 other characteristics of the metabolic syndrome including fasting glucose of 100 to 125 mg/dl; waist circumference greater than 102 cm in men and 88 cm in women, serum triglyceride concentration greater than 150 mg/dl, HDL-C concentrations less than 40 mg/dl in men and 50 mg/dl in women, and blood pressure greater than 130/85 mmHG
* Women must be taking birth control or be postmenopausal.

Exclusion Criteria

* Diagnosed cardiovascular disease or diabetes or disease
* Symptoms that could alter their ability to perform exercise
* Fasting blood glucose of greater than 126 mg/dl
* Smoking
* Taking any medications or supplements (e.g., statins, fibrates, metformin, thiazolidenediones, anti-hypertensives (ACE-inhibitors and angiotensin blockers) which could affect blood lipids or insulin sensitivity.
* Women who are pregnant or plan to become pregnant during the duration of the study
* Individuals exercising regularly (more than one 30 min session per week)
* Individuals with an orthopedic limitations for walking.
* Report any allergies to the medications (statins, lidocaine)

Minimum Eligible Age

25 Years

Maximum Eligible Age

59 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes