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Nutrients
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Effect of Dietary Intake on Athletic Performance
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Effect of Dietary Intake on Athletic Performance

A special issue of Nutrients (ISSN 2072-6643). This special issue belongs to the section "Sports Nutrition".

Deadline for manuscript submissions: closed (15 April 2024) | Viewed by 13117

Special Issue Editor

Dr. Andrew Jagim

E-Mail Website
Guest Editor
Exercise & Sport Science, University of Wisconsin–La Crosse, La Crosse, WI 54601, USA
Interests: dietary supplements; pre-workout supplements; creatine; sport nutrition knowledge; dietary habits; energy availability; body composition
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent evidence has highlighted the growing concern among nutrition practitioners regarding the insufficient dietary habits of athletes. There continues to be a focused interest on the effects of various dietary strategies on athletic performance. Macronutrient ratios, micronutrient intake, dietary supplementation, and the overall energy balance have all been shown to influence various aspects of human performance and health among athlete populations. As the Guest Editor of this Special Edition "Effect of Dietary intake on Athletic Performance," I invite you to submit a manuscript to Nutrients. The objective is to solicit manuscript submissions focused on dietary intake and athletic performance. These could include investigations into the dietary intake and subsequent associations between changes in training adaptations, indices of recovery, and sports performance.

Dr. Andrew Jagim
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nutrients is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • dietary intake
  • energy balance
  • dietary supplements
  • ergogenic aids
  • dietary habits
  • micronutrient intake
  • performance

Published Papers (3 papers)

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Research

13 pages, 783 KiB  
Article
Caffeine Improves Sprint Time in Simulated Freestyle Swimming Competition but Not the Vertical Jump in Female Swimmers
by Kürşat Acar, Ahmet Mor, Hakkı Mor, Zehra Kargın, Dan Iulian Alexe, Mekki Abdioğlu, Raci Karayiğit, Cristina Ioana Alexe, Adin Marian Cojocaru and George Danuț Mocanu
Nutrients 2024, 16(9), 1253; https://doi.org/10.3390/nu16091253 - 23 Apr 2024
Viewed by 330
Abstract
Caffeine (CAF) has been shown to be an effective ergogenic aid in enhancing sports performance, including vertical jump (VJ), sprint, balance, agility, and freestyle swimming performance (FSP). However, whether acute CAF supplementation improves FSP in moderately trained female swimmers has not been well [...] Read more.
Caffeine (CAF) has been shown to be an effective ergogenic aid in enhancing sports performance, including vertical jump (VJ), sprint, balance, agility, and freestyle swimming performance (FSP). However, whether acute CAF supplementation improves FSP in moderately trained female swimmers has not been well documented. Therefore, this study aimed to investigate the effects of CAF intake on vertical jump, balance, auditory reaction time (ART), and swimming performance in female swimmers. In a double-blind, cross-over design, eight moderately trained female swimmers (age: 21.3 ± 1.4 years, height: 161.2 ± 7.1 cm, body mass: 56.3 ± 6.7 kg, body mass index (BMI): 21.9 ± 1.3 kg/m2, and habitual CAF intake: 246.4 ± 111.4 mg/day) ingested caffeine (CAF) (6 mg/kg) or a placebo (PLA) 60 min before completing VJ, balance, ART, and 25/50 m FSP. CAF supplementation resulted in a significantly lower time both in 25m (p = 0.032) and 50m (p = 0.033) FSP. However, CAF resulted in no significant difference in VJ, ART, and RPE (p > 0.05). Balance test results showed a non-significant moderate main effect (d = 0.58). In conclusion, CAF seems to reduce time in short-distance swimming performances, which could be the determinant of success considering the total time of the race. Thus, we recommend coaches and practitioners incorporate CAF into swimmers’ nutrition plans before competitions, which may meet the high performance demands. Full article
(This article belongs to the Special Issue Effect of Dietary Intake on Athletic Performance)
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16 pages, 1196 KiB  
Article
A Five-Week Periodized Carbohydrate Diet Does Not Improve Maximal Lactate Steady-State Exercise Capacity and Substrate Oxidation in Well-Trained Cyclists compared to a High-Carbohydrate Diet
by Gorka Prieto-Bellver, Javier Diaz-Lara, David J. Bishop, José Fernández-Sáez, Javier Abián-Vicén, Iñigo San-Millan and Jordan Santos-Concejero
Nutrients 2024, 16(2), 318; https://doi.org/10.3390/nu16020318 - 21 Jan 2024
Viewed by 9872
Abstract
There is a growing interest in studies involving carbohydrate (CHO) manipulation and subsequent adaptations to endurance training. This study aimed to analyze whether a periodized carbohydrate feeding strategy based on a daily training session has any advantages compared to a high-carbohydrate diet in [...] Read more.
There is a growing interest in studies involving carbohydrate (CHO) manipulation and subsequent adaptations to endurance training. This study aimed to analyze whether a periodized carbohydrate feeding strategy based on a daily training session has any advantages compared to a high-carbohydrate diet in well-trained cyclists. Seventeen trained cyclists (VO2peak = 70.8 ± 6.5 mL·kg−1·min−1) were divided into two groups, a periodized (PCHO) group and a high-carbohydrate (HCHO) group. Both groups performed the same training sessions for five weeks. In the PCHO group, 13 training sessions were performed with low carbohydrate availability. In the HCHO group, all sessions were completed following previous carbohydrate intake to ensure high pre-exercise glycogen levels. In both groups, there was an increase in the maximal lactate steady state (MLSS) (PCHO: 244.1 ± 29.9 W to 253.2 ± 28.4 W; p = 0.008; HCHO: 235.8 ± 21.4 W to 246.9 ± 16.7 W; p = 0.012) but not in the time to exhaustion at MLSS intensity. Both groups increased the percentage of muscle mass (PCHO: p = 0.021; HCHO: p = 0.042) and decreased the percent body fat (PCHO: p = 0.021; HCHO: p = 0.012). We found no differences in carbohydrate or lipid oxidation, heart rate, and post-exercise lactate concentration. Periodizing the CHO intake in well-trained cyclists during a 5-week intervention did not elicit superior results to an energy intake-matched high-carbohydrate diet in any of the measured outcomes. Full article
(This article belongs to the Special Issue Effect of Dietary Intake on Athletic Performance)
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10 pages, 851 KiB  
Article
The Effects of Protein and Carbohydrate Supplementation, with and without Creatine, on Occupational Performance in Firefighters
by Kaia Elstad, Conley Malone, Joel Luedke, Salvador J. Jaime, Ward C. Dobbs, Thomas Almonroeder, Chad M. Kerksick, Adam Markert and Andrew R. Jagim
Nutrients 2023, 15(24), 5134; https://doi.org/10.3390/nu15245134 - 18 Dec 2023
Viewed by 2629
Abstract
Background: The purpose of this study was to assess the effects of protein and carbohydrate supplementation, with and without creatine, on occupational performance in firefighters. Methods: Using a randomized, double-blind approach, thirty male firefighters (age: 34.4 ± 8.4 yrs., height: 1.82 ± 0.07 [...] Read more.
Background: The purpose of this study was to assess the effects of protein and carbohydrate supplementation, with and without creatine, on occupational performance in firefighters. Methods: Using a randomized, double-blind approach, thirty male firefighters (age: 34.4 ± 8.4 yrs., height: 1.82 ± 0.07 m; weight: 88.6 ± 12.5 kg; BF%: 17.2 ± 5.8%) were randomized to receive either (A.) 25 g of whey protein isolate + 25 g of carbohydrate powder (ProCarb group); or (B.) ProCarb + 5 g of creatine (Creatine group) in a double-blind fashion over a period of 21–26 days (depending on shift rotations) to evaluate the impact of supplementation on occupation-specific performance. At baseline and following supplementation, firefighters completed a battery of tests. These tests included an aerobic speed test on an air-braked cycle ergometer followed by the hose carry, body drag, stair climb, and Keiser sled hammer for time. Results: No significant differences in measures of performance were observed at baseline (p > 0.05). There was a significant main effect for time observed for rescue, stair climb, total time to completion, and time trial performance (p < 0.05). There was a significant group × time (p < 0.05) interaction for rescue and forcible entry. Independent sample t-tests indicated that the Creatine group experienced a greater reduction (from baseline) in completion time for the rescue (1.78 ± 0.57 s, 95% CI: 0.61, 2.95 s, p = 0.004) and forcible entry (2.66 ± 0.97 s, 95% CI: 0.68, 4.65 s, p = 0.01) tests compared to the ProCarb group. No significant group × time interactions were observed for the hose line advance, stair climb, total time to completion, and time trial performance (p > 0.05). Conclusions: The addition of supplemental creatine to a protein and carbohydrate supplement to the diet of career firefighters throughout a three week period improves occupational performance in firefighters in specific areas of high-intensity, repetitive actions. Full article
(This article belongs to the Special Issue Effect of Dietary Intake on Athletic Performance)
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