Investigating the effects of negative-calorie diet compared with low-calorie diet under exercise conditions on weight loss and lipid profile in overweight/obese middle-aged and older men

Abstract

Background/aim: Negative-calorie diets (NCDs) are among the popular dieting guides for weight loss; however, there is still little knowledge about this method. The present study aimed to determine the effects of a NCD supplemented with exercise on weight loss and lipid profile, and to compare its efficiency with low-calorie diets (LCDs) with exercise among elderly adult men with abnormal weight gain. Materials and methods:Participants included sedentary men (aged 45-75 years) who were overweight or obese (n = 37). They were randomly divided into 2 groups: a group with a NCD and exercise, and a group with a LCD with exercise. Of all 37 participants, 30 completed the treatment. Weight assessment parameters, including changes in weight and body composition and blood sample tests, were performed before and 3 months after intervention.Results: All parameters decreased significantly in both groups. Elevation in high-density lipoprotein (HDL) cholesterol levels (P < 0.001) was different between the 2 groups. The decline in the total cholesterol to HDL cholesterol ratio was greater in the LCD than the NCD group. Conclusion:Contrary to expectations, both weight-loss diets were equally efficacious.

Study of Weight Loss Parameters Among Sedentary, Overweight Postmenopausal Females Using Different Time Models of Aquafit

“…Therefore, participants were asked to keep their conditions during the research. It was also ordered to announce any difficulties that could affect their participation in research (2,3,22). The research complies with all relevant national statutes, institutional policies, and principles of the Helsinki Declaration.…”

“…Computations of weight, height, and BMI were described in more detail elsewhere (2,3,22). In this regard, BMI of 25 to 29.9 kg/m 2 was characterized as overweight.…”

“…The questionnaire was the scale of Likert-type consisting of seven items from "not at all" (first point) to "Every day" (seventh point) (21). The frequency of exercises from 1 to 2 times per month or less was considered a sedentary lifestyle (2,3,22). Assessments of leisure-time physical activity were performed using a structured interview and were also completed by seven-day physical activity recall (23).…”

“…Excessive weight is raised throughout the world and more than 80% of patients with coronary heart disease (CHD) suffer from it (1). Weight reduction is "broadly effective" risk factor intervention (1), and physical exercise is defined as a necessary component of the behavioral program in losing weight (2)(3)(4). Some researchers also believe that the risk factors of CHD in people with overweight depend on exercise-induced weight loss (5,6).…”

Comparison of Two Types of Diets on Losing Weight and Lipid Profile of Overweight/Obese Middle-Aged Women Under Exercise Condition

“…The Low-calorie diet (LCD) (15% protein, 55% carbohydrate, 30% fat) help to lose weight by reducing total calorie intake, but they do not help to burn calories. In general, low-calorie diet is high in carbohydrates and low in fat (7,8). A large part of negative-calorie diet includes low-calorie fruits and vegetables that are high in fiber (9)(10)(11).…”