The Effects of Concurrent Training Combined with Low-Carbohydrate High-Fat Ketogenic Diet on Body Composition and Aerobic Performance: A Systematic Review and Meta-Analysis

Yubo Wang, Kaixiang Zhou (), Vienna Wang, Dapeng Bao () and Junhong Zhou
Additional contact information
Yubo Wang: China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China
Kaixiang Zhou: Sports Health College, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
Vienna Wang: College of Engineering, California State University, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
Dapeng Bao: China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China
Junhong Zhou: Hebrew Senior Life Hinda and Arthur Marcus Institute for Aging Research, Harvard Medical School, Boston, MA 02115, USA

IJERPH, 2022, vol. 19, issue 18, 1-16

Abstract: (1) Background: Recently, studies have emerged to explore the effects of concurrent training (CT) with a low-carb, high-fat ketogenic diet (LCHF) on body composition and aerobic performance and observed its benefits. However, a large variance in the study design and observations is presented, which needs to be comprehensively assessed. We here thus completed a systematic review and meta-analysis to characterize the effects of the intervention combining CT and LCHF on body composition and aerobic capacity in people with training experience as compared to that combining CT and other dietary strategies. (2) Methods: A search strategy based on the PICOS principle was used to find literature in the databases of PubMed, Web of Science, EBSCO, Sport-discuss, and Medline. The quality and risk of bias in the studies were independently assessed by two researchers. (3) Result: Eight studies consisting of 170 participants were included in this work. The pooled results showed no significant effects of CT with LCHF on lean mass (SMD = −0.08, 95% CI −0.44 to 0.3, p = 0.69), body fat percentage (SMD = −0.29, 95% CI −0.66 to 0.08, p = 0.13), body mass (SMD = −0.21, 95% CI −0.53 to 0.11, p = 0.2), VO 2max (SMD = −0.01, 95% CI −0.4 to 0.37, p = 0.95), and time (or distance) to complete the aerobic tests (SMD = −0.02, 95% CI −0.41 to 0.37, p = 0.1). Subgroup analyses also showed that the training background of participants (i.e., recreationally trained participants or professionally trained participants) and intervention duration (e.g., > or ≤six weeks) did not significantly affect the results. (4) Conclusions: This systematic review and meta-analysis provide evidence that compared to other dietary strategies, using LCHF with CT cannot induce greater benefits for lean mass, body fat percentage, body mass, VO 2max , and aerobic performance in trained participants.

Keywords: low-carb; high-fat ketogenic diet; concurrent training; body composition; aerobic performance; athletes (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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