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Nutrients 2018, 10(12), 1914;

Three-Year Chronic Consumption of Low-Carbohydrate Diet Impairs Exercise Performance and Has a Small Unfavorable Effect on Lipid Profile in Middle-Aged Men

Institute of Physical Education, Tourism and Physiotherapy, Jan Dlugosz University, 42-200 Czestochowa, Poland
Department of Physiotherapy, Opole Medical School, 45-060 Opole, Poland
Department of Sports Training, the Jerzy Kukuczka Academy of Physical Education in Katowice, Faculty of Physical Education, 44-100 Katowice, Poland
Department of Kinesiology, Institute of Sport, 01-982 Warsaw, Poland
Faculty of Medicine and Health Sciences, University of Zielona Góra, 65-417 Zielona Góra, Poland
Department of Tourism and Health in Biala Podlaska, Józef Piłsudski University of Physical Education in Warsaw, 00-968 Warsaw, Poland
Author to whom correspondence should be addressed.
Received: 24 October 2018 / Revised: 24 November 2018 / Accepted: 27 November 2018 / Published: 4 December 2018
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The objective of this research was to determine whether chronic (average 3.58 ± 1.56 years) deliberate adherence to low carbohydrate diets (LCDs) is associated with selected markers of metabolism, risk factors of cardiovascular disease (CVD), body mass and physical performance in apparently healthy middle-aged men (n = 12). The control group comprised age, body mass and height matched men using mixed diets (MDs). The diets used were registered for 7 days and analyzed in terms of the energy, carbohydrate, fat and protein contents. It was found that the diets used were isoenergetic, yet varied considerably in carbohydrate and fat content. The LCDs significantly intensified the ketogenesis process, increased resting blood total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and heart rate, (HR) and decreased respiratory exchange ratio (RER) in relation to MD subjects. An exercise trial revealed significant impairment of exercise in subjects following the LCDs. The results showed that in the case where the subjects of two investigated groups did not differ in their somatic variables, long-term adherence to the LCDs was associated with substantially reduced exercise performance in apparently healthy subjects, along with an association with a small unfavorable effect on their lipid profile. View Full-Text
Keywords: diets; carbohydrate restriction; metabolism; men; cardiovascular disease diets; carbohydrate restriction; metabolism; men; cardiovascular disease
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Pilis, K.; Pilis, A.; Stec, K.; Pilis, W.; Langfort, J.; Letkiewicz, S.; Michalski, C.; Czuba, M.; Zych, M.; Chalimoniuk, M. Three-Year Chronic Consumption of Low-Carbohydrate Diet Impairs Exercise Performance and Has a Small Unfavorable Effect on Lipid Profile in Middle-Aged Men. Nutrients 2018, 10, 1914.

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