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For: Coletta AM, Sanchez B, O'Connor A, Dalton R, Springer S, Koozehchian MS, Murano PS, Woodman CR, Rasmussen C, Kreider RB. Alignment of diet prescription to genotype does not promote greater weight loss success in women with obesity participating in an exercise and weight loss program. Obes Sci Pract 2018;4:554-574. [PMID: 30574349 PMCID: PMC6298313 DOI: 10.1002/osp4.305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/03/2018] [Accepted: 10/11/2018] [Indexed: 12/18/2022] Open

Number

Cited by Other Article(s)

Dickerson B, Maury J, Jenkins V, Nottingham K, Xing D, Gonzalez DE, Leonard M, Kendra J, Ko J, Yoo C, Johnson S, Pradelles R, Purpura M, Jäger R, Sowinski R, Rasmussen CJ, Kreider RB. Effects of Supplementation with Microalgae Extract from Phaeodactylum tricornutum (Mi136) to Support Benefits from a Weight Management Intervention in Overweight Women. Nutrients 2024;16:990. [PMID: 38613023 PMCID: PMC11013338 DOI: 10.3390/nu16070990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open

Abstract

BACKGROUND

Microalgae like Phaeodactylum tricornutum (PT) contain the carotenoid, fucoxanthin, which has been purported to promote fat loss, lower blood lipids, and improve glucose management. This study examined whether dietary supplementation with microalgae extracts from PT containing 4.4 mg/d of fucoxanthin affects changes in body composition or health markers in overweight women during an exercise and diet intervention.

MATERIALS AND METHODS

A total of 37 females (28.6 ± 7.9 years, 80.2 ± 14.9 kg, 29.6 ± 3.8 kg/m², 41.4 ± 4.2% fat) fasted for 12 h, donated a fasting blood sample, completed health and mood state inventories, and undertook body composition, health, and exercise assessments. In a counterbalanced, randomized, and double-blind manner, participants ingested a placebo (PL), or microalgae extract of Phaeodactylum tricornutum standardized to 4.4 mg of fucoxanthin (FX) for 12 weeks while participating in a supervised exercise program that included resistance-training and walking (3 days/week) with encouragement to accumulate 10,000 steps/day on remaining days of the week. The diet intervention involved reducing energy intake by about -300 kcal/d (i.e., ≈1400-1600 kcals/d, 55% carbohydrate, 30% fat, 15% protein) to promote a -500 kcal/d energy deficit with exercise. Follow-up testing was performed at 6 and 12 weeks. A general linear model (GLM) with repeated measures statistical analysis was used to analyze group responses and changes from baseline with 95% confidence intervals.

RESULTS

Dietary supplementation with microalgae extract from PT containing fucoxanthin for 12 weeks did not promote additional weight loss or fat loss in overweight but otherwise healthy females initiating an exercise and diet intervention designed to promote modest weight loss. However, fucoxanthin supplementation preserved bone mass, increased bone density, and saw greater improvements in walking steps/day, resting heart rate, aerobic capacity, blood lipid profiles, adherence to diet goals, functional activity tolerance, and measures of quality of life. Consequently, there appears to be some benefit to supplementing microalgae extract from PT containing fucoxanthin during a diet and exercise program. Registered clinical trial #NCT04761406.

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Affiliation(s)

Broderick Dickerson Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Jonathan Maury Research & Development Department, Microphyt, 34670 Baillargues, France; (J.M.); (R.P.)
Victoria Jenkins Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Kay Nottingham Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Dante Xing Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Drew E. Gonzalez Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Megan Leonard Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Jacob Kendra Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Joungbo Ko Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Choongsung Yoo Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Sarah Johnson Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Rémi Pradelles Research & Development Department, Microphyt, 34670 Baillargues, France; (J.M.); (R.P.)
Martin Purpura Increnovo LLC, Whitefish Bay, WI 53217, USA; (M.P.); (R.J.)
Ralf Jäger Increnovo LLC, Whitefish Bay, WI 53217, USA; (M.P.); (R.J.)
Ryan Sowinski Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Christopher J. Rasmussen Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)
Richard B. Kreider Exercise & Sport Nutrition Laboratory, Department of Kinesiology and Sports Management, Texas A&M University, College Station, TX 77843, USA; (B.D.); (V.J.); (K.N.); (D.X.); (D.E.G.); (M.L.); (J.K.); (J.K.); (C.Y.); (S.J.); (R.S.); (C.J.R.)

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de Luis DA, Izaola O, Primo D, Gómez JJL. Role of beta-2 adrenergic receptor polymorphism (rs1042714) on body weight and glucose metabolism response to a meal-replacement hypocaloric diet. Nutrition 2023;116:112170. [PMID: 37572548 DOI: 10.1016/j.nut.2023.112170] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/13/2023] [Accepted: 07/18/2023] [Indexed: 08/14/2023]

Abstract

OBJECTIVES

The beta-2 adrenergic receptor (ADRB2) is involved in energy balance regulation. The objective of our study was to evaluate the role of the rs1042714 genetic variant of ADRB2 gene on weight loss, body composition, and metabolic changes secondary to partial meal replacement (pMR) hypocaloric diet in women with obesity.

METHODS

We conducted an interventional study in 95 premenopausal women with body mass index ≥ 35 kg/m2. The subjects received two intakes per day of a normocaloric hyperproteic formula during 12 wk of a pMR diet. Body weight, body mass index, fat mass, waist circumference, lipid profile, fasting insulin levels, and homeostasis model assessment for insulin resistance were determined. All patients were genotyped rs1042714 and evaluated in a dominant model (CC versus CG + GG).

RESULTS

Genotype frequencies were 31 (37.3%), 38 (45.8%), and 14 (16.9%) for the CC, CG, and GG genotypes, respectively. We found significant interaction effects between ADRB2 variant and pMR-induced changes (CC versus CG + GG) on body weight (-7.1 ± 0.3 versus -13.5 ± 0.5 kg; P = 0.03), body mass index (-0.9 ± 0.1 versus -1.2 ± 0.2 kg/m2; P = 0.03), fat mass (-4.9 ± 0.5 versus -10.2 ±1.2 kg; P = 0.01), waist circumference (-5.1 ± 0.2 versus -10.1 ± 1.9 cm; P = 0.03), glucose (-5.1 ± 1.3 versus -12.5 ± 2.5 mg/dL; P = 0.03), total cholesterol (-18.1 ± 9.3 versus -33.5 ± 4.5 mg/dL; P = 0.03), low-density lipoprotein cholesterol (-9.1 ± 5.3 versus -24.5 ± 4.1 mg/dL; P = 0.04), triacylglycerol levels (-6.1 ± 5.3 versus -31.5 ± 9.5 mg/dL; P = 0.04), fasting insulin levels (-1.8 ± 0.3 versus -6.3 ± 0.5 IU/L; P = 0.03), and homeostasis model assessment for insulin resistance (-0.6 ± 0.3 versus -1.9 ± 0.5 U; P = 0.03). The odds ratio to improve alteration in glucose metabolism adjusted by age and weight loss throughout the study was 0.26 (95% CI, 0.07-0.95; P = 0.02) in G allele carriers.

CONCLUSIONS

The G allele of rs1042714 predicts the magnitude of weight loss resulting from a pMR diet. These adiposity improvements produce a better improvement of insulin resistance and percentage of impaired glucose metabolism in G allele carriers.

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Nacis JS, Labrador JPH, Ronquillo DGD, Rodriguez MP, Dablo AMFD, Frane RD, Madrid ML, Santos NLC, Carrillo JJV, Fernandez MG, Gonzales GBL. A study protocol for a pilot randomized controlled trial to evaluate the effectiveness of a gene-based nutrition and lifestyle recommendation for weight management among adults: the MyGeneMyDiet^® study. Front Nutr 2023;10:1238234. [PMID: 37674889 PMCID: PMC10477364 DOI: 10.3389/fnut.2023.1238234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 08/09/2023] [Indexed: 09/08/2023] Open

Abstract

Introduction

Managing nutrition and lifestyle practices, nutrition phenotypes, and the genome forms the foundation of precision nutrition. Precision nutrition focuses on metabolic variability among individuals, and one approach to achieving its goals is to integrate gene-based nutrition and lifestyle recommendations in nutrition practice. However, scientific evidence proving the effectiveness of such recommendations is limited. This study will examine whether providing nutrition and lifestyle recommendations based on individual genotype can lead to better weight loss, along with reduction in body mass index (BMI), waist circumference, and body fat percentage among overweight and obese adults.

Methods and analysis

A parallel group, single-blind, randomized controlled trial will be conducted. Sixty-two overweight/obese individuals aged 19-59 years old will be recruited. Participants will be randomly allocated to either the intervention (n = 31) or the control arm (n = 31). Participants in the intervention group will receive the MyGeneMyDiet® Recommendation for Weight Management, a gene-based nutrition and lifestyle recommendation that was developed based on existing evidence of the effects of FTO rs9939609 on body weight, BMI, and physical activity; UCP1 rs1800592 on calorie intake; and TCF7L2 rs7903146 on dietary fat intake. Participants in the control group will receive the standard recommendations for weight management. The primary outcomes will be the differences in weight, BMI, waist circumference, and body fat percentage between arms in both the active phase (6 months) and inactive phase (last 6 months) of the trial. Participants in both arms will be evaluated at baseline and in months 3, 6, 9, and 12.

Discussion

To the best of our knowledge, this will be the first gene-based intervention that will adopt a phase of intensive nutrition counseling, followed by a simulation of a free-living state to determine adherence to a gene-based recommendation. This study will contribute to the future implementation of precision nutrition interventions by providing evidence on the effectiveness of a gene-based nutrition and lifestyle recommendation for weight loss.

Clinical trial registration

clinicaltrials.gov, identifier [NCT05098899].

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Lockard B, Mardock M, Oliver JM, Byrd M, Simbo S, Jagim AR, Kresta J, Baetge CC, Jung YP, Koozehchian MS, Khanna D, Rasmussen C, Kreider RB. Comparison of Two Diet and Exercise Approaches on Weight Loss and Health Outcomes in Obese Women. Int J Environ Res Public Health 2022;19:4877. [PMID: 35457744 PMCID: PMC9032860 DOI: 10.3390/ijerph19084877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 11/16/2022]

Abstract

AIM

To compare the efficacy of two popular weight loss approaches on weight loss, body composition, and markers of health in sedentary obese women.

METHODS

In total, 51 sedentary women (age 34.5 ± 7.7 yrs.; weight 90.0 ± 14.5 kg; BMI 34.0 ± 5.1 kg/m2; 46.5 ± 7.0% fat) were matched and randomized to participate in the Weight Watchers® Momentum™ (WW) or Curves® (CV) Fitness and Weight Management program for 16 weeks. Participants in the WW group (n = 27) were provided a point-based diet program, received weekly progress checks and counseling, and were encouraged to exercise. Participants in the CV group (n = 24) followed a menu-based higher protein/low-fat diet (1200 kcal/d) for 1 week; 1500 kcal/d diet for 3 weeks; and 2000-2500 kcals/d for 2 weeks that was repeated three times (except the last segment) while participating in a supervised circuit-style resistance training program (3 d/wk). A general linear model (GLM) with repeated measures was used to analyze data and are presented as mean changes from baseline (mean [UL, LL]).

RESULTS

Supervised CV training resulted in greater amounts of vigorous and total physical activity. After 16 weeks, both groups lost weight (WW -6.1 [-7.8, -4.6], CV -4.9 [-6.2, -3.2] kg, p = 0.264). Participants in the CV group observed greater reductions in fat mass (WW -2.9 [-6.7, -0.2], CV -6.4 [-9.2, -3.6] kg, p = 0.081) and increases in lean mass (WW -2.5 [-4.3, -0.7], CV 1.3 [-0.6, 3.2] kg, p = 0.005) resulting in more favorable changes in percent body fat (WW -1.4 [-4.1, 1.2], CV -4.7 [-7.5, -1.8]%, p = 0.098). Both groups observed improvements in peak aerobic capacity and muscular endurance, although bench press lifting volume was greater in the CV group. Those in the CV group experienced a greater increase in HDLc and reduction in the CHL-HDLc ratio and triglycerides.

CONCLUSION

Both interventions promoted weight loss and improvements in fitness and markers of health. The CV program, which included supervised resistance training and higher protein diet menus, promoted greater fat loss, increases in lean mass, and improvements in percent body fat and blood lipids.

TRIAL REGISTRATION

clinicaltrials.gov, #NCT04372771, registered retrospectively 1 May 2020.

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Affiliation(s)

Brittanie Lockard School of Nursing and Health Professions, University of the Incarnate Word, San Antonio, TX 78209, USA;
Michelle Mardock Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.)
Jonathan M. Oliver Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.)
Mike Byrd Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.) Byrd’s Eye Enterprises, Inc., Forney, TX 75126, USA
Sunday Simbo Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.) Center for Translational Research in Aging & Longevity, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX 77843, USA
Andrew R. Jagim Department of Sports Medicine, Mayo Clinic Health System, Onalaska, WI 54650, USA;
Julie Kresta College of Education and Human Development, Texas A&M University Central-Texas, Killeen, TX 76549, USA;
Claire C. Baetge Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.)
Yanghoon Peter Jung CJ CheilJedang, Suwon 16495, Korea;
Majid S. Koozehchian Department of Kinesiology, Jacksonville State University, Jacksonville, AL 36265, USA;
Deepesh Khanna Department of Foundational Sciences, Nova Southeastern University, Clearwater, FL 33759, USA;
Chris Rasmussen Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.)
Richard B. Kreider Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health and Kinesiology, Texas A & M University, College Station, TX 77843, USA; (M.M.); (J.M.O.); (M.B.); (S.S.); (C.C.B.); (C.R.)

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Sowinski RJ, Grubic TJ, Dalton RL, Schlaffer J, Reyes-Elrod AG, Jenkins VM, Williamson S, Rasmussen C, Murano PS, Earnest CP, Kreider RB. An Examination of a Novel Weight Loss Supplement on Anthropometry and Indices of Cardiovascular Disease Risk. J Diet Suppl 2020;18:478-506. [PMID: 32691639 DOI: 10.1080/19390211.2020.1786207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]

Affiliation(s)

Ryan J Sowinski Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA.,Department of Nutrition and Food Sciences, Texas A&M University, College Station, TX, USA
Tyler J Grubic Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Ryan L Dalton Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Jessica Schlaffer Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Aimee G Reyes-Elrod Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA.,Department of Nutrition and Food Sciences, Texas A&M University, College Station, TX, USA
Victoria M Jenkins Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Susannah Williamson Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Christopher Rasmussen Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Peter S Murano Department of Nutrition and Food Sciences, Texas A&M University, College Station, TX, USA
Conrad P Earnest Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
Richard B Kreider Exercise & Sport Nutrition Lab, Human Clinical Research Facility, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA

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Horne J, Gilliland J, Madill J. Assessing the effectiveness of actionable nutrigenomics and lifestyle genomics interventions for weight management in clinical practice: A critical, scoping review with directions for future research. Nutr Health 2020;26:167-173. [PMID: 32500817 DOI: 10.1177/0260106020928667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]

Vargas-Molina S, Petro JL, Romance R, Kreider RB, Schoenfeld BJ, Bonilla DA, Benítez-Porres J. Effects of a ketogenic diet on body composition and strength in trained women. J Int Soc Sports Nutr 2020;17:19. [PMID: 32276630 PMCID: PMC7146906 DOI: 10.1186/s12970-020-00348-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 03/27/2020] [Indexed: 01/07/2023] Open

Abstract

Background

The effect of ketogenic diets (KD) on body composition in different populations has been investigated. More recently, some have recommended that athletes adhere to ketogenic diets in order to optimize changes in body composition during training. However, there is less evidence related to trained women. We aimed to evaluate the effect of a KD on body composition and strength in trained women following an eight-week resistance training (RT) program.

Methods

Twenty-one strength-trained women (27.6 ± 4.0 years; 162.1 ± 6.6 cm; 62.3 ± 7.8 kg; 23.7 ± 2.9 kg·m^− 2) were randomly assigned to either a non-KD group (n = 11, NKD) or a KD group (n = 10, KD). Study outcomes included body composition as measured by dual-energy X-ray absorptiometry (DXA), strength levels measured using one maximum repetition (RM) in back squat and bench press (BP), and countermovement jump (CMJ) measured on a force plate.

Results

A significant reduction in fat mass was observed in KD (− 1.1 ± 1.5 kg; P = 0.042; d = − 0.2) but not in NDK (0.3 ± 0.8 kg; P = 0.225; d = 0.1). No significant changes in fat-free mass were observed in KD (− 0.7 ± 1.7 kg; P = 0.202; d = − 0.1) or NKD (0.7 ± 1.1 kg; P = 0.074; d = 0.2), but absolute changes favored NKD. No significant changes in BP were observed in KD (1.5 ± 4.6 kg; P = 0.329; d = 0.2), although significant changes were noted in the squat and CMJ (5.6 ± 7.6 kg; P = 0.045; d = 0.5 and 2.2 ± 1.7 kg; P = 0.022; d = 0.6, respectively). In contrast, NKD showed significant increases in BP (4.8 ± 1.8; P < 0.01; d = 0.7), squat (15.6 ± 5.4 kg; P = 0.005; d = 1.4) and CMJ (22.0 + 4.2 cm; P = 0.001; d = 0.5).

Conclusions

Findings indicate that a KD may help to decrease fat mass and maintain fat-free mass after eight 8 weeks of RT in trained-women but is suboptimal for increasing fat-free mass.

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