Abstract
The objective of this research was to determine the effectiveness of intermittent fasting (IF) in reducing body fat and lowering body mass index. An additional objective was to determine the feasibility of applying IF in overweight women over 60 years of age, which was assessed by the ratio of subjects who resigned from the diet plan. This study included a group of 45 women over 60 years of age. The intervention in the experimental group involved complete abstinence from food intake for 16 h per day, from 20:00 p.m. to 12:00 a.m. (the next day). The results demonstrated that the body weight in the subjects in the experimental group (EXP) group decreased by almost 2 kg and this decrease was visible in the remaining parameters related to body fat mass. The skeletal muscle mass did not change significantly, which indicates an actual decrease in the fat mass. The proportion of subjects who did not succeed in following the prescribed diet plan was 12%. The application of intermittent fasting in female subjects over 60 years of age resulted in positive changes in body composition. Time-restricted feeding (TRF) was characterized by a lower resignation rate compared to other diets involving intermittent fasting.
Highlights
The aging process is an inevitable stage of human ontogeny
The results of the initial measurements indicated no difference in body weight between the groups, whereas the examination performed after the experiment demonstrated a difference in favor of the experimental group
The ankle–brachial index (ABI) results demonstrated that none of the subjects had an index below 0.9, which indicated the absence of significant limb ischemia
Summary
In developed countries, a significant extension of life expectancy can be observed among individuals in the post-working period. This is largely related to the improvement of living conditions, access to better medical care and the increasing role of diet and nutrition, which are central to the growth of life expectancy [1,2]. Statistics indicate that overweight/obesity continues its relentless global rise, with the number of people with excess body weight reaching >2 billion, ~30% of the world population. The problem of excess body weight applies to all age groups; it is most clearly visible in children and seniors. Important factors that contribute to negative age-related changes in body composition of seniors are insulin resistance [4] and progressive loss of muscle and bone mass [5]
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