Effect of Weight Loss on Cardiovascular Disease Risk Factors in Obese Women
| Status: | Completed |
|---|---|
| Conditions: | Obesity Weight Loss, Peripheral Vascular Disease |
| Therapuetic Areas: | Cardiology / Vascular Diseases, Endocrinology |
| Healthy: | No |
| Age Range: | 30 - 55 |
| Updated: | 4/21/2016 |
| Start Date: | April 2011 |
| End Date: | July 2011 |
The Effect of Weight Loss and Exercise on Cardiovascular Disease Risk Factors in Class II and III Obese Women
The purpose of this study is to examine the effect of weight loss and exercise on
cardiovascular disease risk factors, specifically inflammation as measured by C-Reactive
Protein and cardiac structure and function as measured by cardiac MRI, in Class II and III
obese women during a 12 week training intervention.
cardiovascular disease risk factors, specifically inflammation as measured by C-Reactive
Protein and cardiac structure and function as measured by cardiac MRI, in Class II and III
obese women during a 12 week training intervention.
To date, research investigating obesity, inflammation, and cardiovascular disease has
utilized lifestyle interventions focused on weight loss and exercise among groups with BMI
classifications of normal, overweight and mildly obese. A limitation of recent
investigations is the failure to utilize participants who are significantly overweight.
Those whose BMI classification extends to Class II and Class III obesity (BMI > 35.0, and
BMI > 40.0) have not yet been studied at length, yet these individuals have been shown to be
able to substantially improve their cardiovascular risk profiles without attaining a BMI
below 25. Inactivity has been linked to increased adiposity and a trend toward higher levels
of cardiovascular disease risk. It is necessary to study the relationships between weight
loss and weight loss with added physical activity among Class II and Class III obese
participants in order to gain a more thorough knowledge of the effects of BMI on circulating
markers of inflammation and the cardiac structural and functional changes associated with
weight loss among this population. A second limitation of the current research is the use of
strictly progressive resistance training protocols. The protocols used have increased
constantly in intensity or volume, if not both. Constant increases in intensity tend to lead
to overtraining among participants, highlighting a need for more variation of intensity and
volume in the training protocol in order to avoid stagnation and overtraining. Finally, no
research has studied the specific impact of diet and resistance training on either CRP or
cardiovascular adaptations.
utilized lifestyle interventions focused on weight loss and exercise among groups with BMI
classifications of normal, overweight and mildly obese. A limitation of recent
investigations is the failure to utilize participants who are significantly overweight.
Those whose BMI classification extends to Class II and Class III obesity (BMI > 35.0, and
BMI > 40.0) have not yet been studied at length, yet these individuals have been shown to be
able to substantially improve their cardiovascular risk profiles without attaining a BMI
below 25. Inactivity has been linked to increased adiposity and a trend toward higher levels
of cardiovascular disease risk. It is necessary to study the relationships between weight
loss and weight loss with added physical activity among Class II and Class III obese
participants in order to gain a more thorough knowledge of the effects of BMI on circulating
markers of inflammation and the cardiac structural and functional changes associated with
weight loss among this population. A second limitation of the current research is the use of
strictly progressive resistance training protocols. The protocols used have increased
constantly in intensity or volume, if not both. Constant increases in intensity tend to lead
to overtraining among participants, highlighting a need for more variation of intensity and
volume in the training protocol in order to avoid stagnation and overtraining. Finally, no
research has studied the specific impact of diet and resistance training on either CRP or
cardiovascular adaptations.
Inclusion Criteria:
- Female
- 30-55 years of age
- BMI = 35.0-44.9 kg/m2
Exclusion Criteria:
- Currently pregnant, pregnant in the past 6 months, or planning on becoming pregnant
in the next 6 months.
- Regularly exercising for greater than 60 minutes per week.
- Taking prescription or over-the-counter medications that affect body weight,
metabolism, blood pressure, or heart rate, such as psychotropic medications (e.g.
zoloft, prozac, paxil, xanax) and medications that have metabolic effects (e.g.
synthroid, wellbutrin, metformin).
- Having physical limitations that hinder or prevent exercise.
- Currently being treated for coronary heart disease, diabetes mellitus, hypertension,
or cancer.
- Having a resting systolic blood pressure of > 150mmHg of diastolic blood pressure of
> 100mmHg or currently taking any medications that affect blood pressure or heart
rate (i.e. beta blockers).
- Currently enrolled in an exercise or weight control study or participating in an
exercise or weight control study in the past 6 months.
- Have lost and not regained > 5% body weight in the past 6 months.
- Currently being treated for any psychological problems or taking any psychotropic
medications.
- Abnormal kidney functions, as per current institutional standard for gadolinium
administration.
- Known allergy to IV gadolinium, or the discovery of an allergic reaction to IV
gadolinium at baseline.
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Pittsburgh, Pennsylvania 15203
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