The Effects of a Macronutrient-Based Diet and Time-RestrictedFeeding (16:8) on Body Composition in Physically ActiveIndividuals—A 14-Week Randomised Controlled Trial.

Publications: Contribution to journalJournal articlesResearchpeer-review


Research units


The number of people suffering from being overweight or obese has risen steadily in recentyears. Consequently, new forms of nutrition and diets were developed as potential solutions. In thelast years, the time-restricted feeding and continuous energy restriction via macronutrient-based dietswere increasingly popular. Both diets were exclusively studied separately. A comparison of the twodiets for people with a high body mass index despite regular physical activity has not yet been studiedin detail. Therefore, this study aimed to compare the effects of these two diets on body compositionand adherence. For this study, a total of 42 subjects (m = 21, f = 21) with a BMI above 25 were recruitedfrom a local fitness gym. After a two-week familiarisation period, one of the two diets was followedover 14 weeks. Dietary behaviour was monitored throughout the period with a food diary. The primarymeasurement parameters were body weight, lean body mass, fat mass, body mass index, and waist andhip circumference. In addition, adherence was assessed and calculated by food diary and questionnaire.In total, the data of 35 participants (m = 14, f = 21) were analysed. Significant reductions in bodyweight, fat mass, body mass index, and waist and hip circumference were observed in both groups(p< 0.05). No significant change could be observed in lean body mass in either category. No group andgender differences were detected in any of the primary parameters. For the secondary parameters, asignificantly higher adherence was observed in the time-restricted feeding group (p< 0.05). In addition,it can be assumed that an adherence of 60–70% cannot lead to positive changes in body composition. Inconclusion, there were no differences between the two diets on the primary parameters. However, itseemed that time-restricted feeding can be better implemented in everyday life, and an adherence ofmore than 70% is required for both diets to prove effective.
Original languageEnglish
Article number3122
Issue number9
Number of pages14
Publication statusPublished - 06.09.2021

ID: 6231443


View graph of relations