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1,373 results on '"Stout, Jeffrey R."'

104. A Bioinformatics-Assisted Review on Iron Metabolism and Immune System to Identify Potential Biomarkers of Exercise Stress-Induced Immunosuppression

Author

Bonilla, Diego A., primary, Moreno, Yurany, additional, Petro, Jorge L., additional, Forero, Diego A., additional, Vargas-Molina, Salvador, additional, Odriozola-Martínez, Adrián, additional, Orozco, Carlos A., additional, Stout, Jeffrey R., additional, Rawson, Eric S., additional, and Kreider, Richard B., additional

Published
2022
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122. Development and test–retest reliability of the Combat Sports Post-Career Health Questionnaire (CSPCHQ).

Author

Krstulović, Saša, Franchini, Emerson, Fukuda, David H., Stout, Jeffrey R., DelCastillo-Andrés, Óscar, and Kuvačić, Goran

Subjects
EXPERIMENTAL design, STATISTICAL reliability, RESEARCH evaluation, RESEARCH methodology, RESEARCH methodology evaluation, MARTIAL arts, MANN Whitney U Test, WEIGHT gain, TEST validity, WEIGHT loss, INTRACLASS correlation, QUESTIONNAIRES
Abstract

The long-term impact of weight cycling on health status, eating habits, physical activity and the lifestyle of former combat sports athletes is still insufficiently explored. Therefore, a novel questionnaire in English, Portuguese, Spanish and Croatian language was constructed. To determine the reliability and the content/face validity, a total of 110 participants filled the questionnaire on two occasions. With the majority of intra-class correlation coefficient values above 0·75, the questionnaire items were shown to be very stable. Additionally, according to κ values, the questionnaire has fair test–retest reliability, with only one coefficient being labelled as poor (Q40 in ESP). All questionnaire sub-scales showed moderate to very good internal consistency when the overall sample was observed (α ranging from 0·605 to 0·802). Poor α values were found only in Godin-Shephard Leisure-Time Physical Activity Questionnaire for CRO and ESP samples. Wilcoxon's signed rank test showed significant differences only in the Mindful Eating Questionnaire sub-scale scores (overall: P = 0·002, effect size = −0·208 [moderate]; CRO: P = 0·005, effect size = 0·303 [moderate]). It can be concluded that the newly developed questionnaire had strong test–retest reliability. Further validity research in a larger sample of former combat sports athletes should be considered. [ABSTRACT FROM AUTHOR]

Published
2023
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124. ISSN Exercise & Sport Nutrition Review: Research & Recommendations

Author

Mendel Ron, Lowery Lonnie M, Leutholtz Brian, Kleiner Susan M, Kalman Douglas S, Incledon Thomas, Greenwood Mike, Earnest Conrad, Broeder Craig, Antonio Jose, Almada Anthony L, Kreider Richard B, Stout Jeffrey R, Willoughby Darryn S, and Ziegenfuss Tim N

Subjects
sport nutrition, dietary supplements, ergogenic aids, weight gain, weight loss, Nutrition. Foods and food supply, TX341-641, Sports medicine, RC1200-1245
Abstract

Abstract Sport nutrition is a constantly evolving field with literally thousands of research papers published annually. For this reason, keeping up to date with the literature is often difficult. This paper presents a well-referenced overview of the current state of the science related to how to optimize training through nutrition. More specifically, this article discusses: 1.) how to evaluate the scientific merit of nutritional supplements; 2.) general nutritional strategies to optimize performance and enhance recovery; and, 3.) our current understanding of the available science behind weight gain, weight loss, and performance enhancement supplements. Our hope is that ISSN members find this review useful in their daily practice and consultation with their clients.

Published
2004
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144. Maturity-Related Differences in Systemic Pulmonary and Localized Fatigue Threshold Among Youth Male Athletes.

Author

Beyer, Kyle S., Stout, Jeffrey R., Redd, Michael J., Baker, Kayla M., Bergstrom, Haley C., Hoffman, Jay R., and Fukuda, David H.

Subjects
ANALYSIS of variance, COMPARATIVE studies, ELECTROMYOGRAPHY, EXERCISE tests, FATIGUE (Physiology), NEAR infrared spectroscopy, PUBERTY, PULMONARY gas exchange, QUADRICEPS muscle, OXYGEN consumption, MALE athletes, DESCRIPTIVE statistics, MUSCLE fatigue, INTRACLASS correlation, ADOLESCENCE
Abstract

Purpose: To examine the reliability and the maturity-related differences of fatigue thresholds (FTs) among youth males. Methods: Twenty-nine youth males (11–17 y) completed 2 ramp exercise tests on a cycle ergometer. Systemic FTs were calculated from gas exchange and ventilation variables. Localized FTs were calculated from electromyography and near-infrared spectroscopy of the vastus lateralis. All FTs were determined using the maximal distance method and expressed relative to maximal oxygen consumption. All participants were grouped according to the number of years from peak height velocity into PRE- (< −1.5 y), PERI- (−1.5 to +1.5 y) and POST- (> +1.5 y) peak height velocity. Reliability was assessed with intraclass correlation coefficients, and differences between groups were assessed with analysis of variance and Cohen's d coefficients. Results: Analysis of variance revealed significant group differences with PRE having significantly greater systemic pulmonary FTs than POST, while localized muscular FTs were significantly greater in PRE when compared with PERI and POST. All FTs exhibited excellent reliability (intraclass correlation coefficient >.75) in all maturity groups. Conclusion: Maturity status appears to influence the onset of FTs among youth male athletes, with FTs occurring later in younger athletes. Furthermore, all FTs were reliable measures regardless of maturity. [ABSTRACT FROM AUTHOR]

Published
2019
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