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Cited by 13Regulation of Appetite and ObesitySports Performance and TrainingEating Disorders and Behaviors

Changes in Stress and Appetite Responses in Male Power-Trained Athletes during Intensive Training Camp

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Oshima, Satomi, Takehata, Chisato, Sasahara, Ikuko, Lee, Eunjae, Akama, Takao, Taguchi, Motoko·2017·Nutrients
DOI 10.3390/nu9080912PMC PMC5579705
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Abstract

An intensive consecutive high-volume training camp may induce appetite loss in athletes. Therefore, this study aimed to investigate the changes in stress and appetite responses in male power-trained athletes during an intensive training camp. The measurements at Day 2 and at the end of a 9-day intensive training camp (Camp1 and Camp2, respectively) were compared with those of the resting period (Rest) and the regular training period (Regular; n = 13). The stress state was assessed based on plasma cortisol level, salivary immunoglobulin A level, and a profile of mood states score. The sensation of appetite was assessed using visual analog scale scores, and fasting plasma acylated ghrelin, insulin, and glucose were measured. The cortisol concentrations were significantly higher at Camp2 (466.7 ± 60.7 nmol∙L−1) than at Rest (356.3 ± 100.9 nmol∙L−1; p = 0.002) or Regular (361.7 ± 111.4 nmol∙L−1; p = 0.003). Both prospective and actual food consumption significantly decreased at Camp2, and acylated ghrelin concentration was significantly lower at Camp1 (34.2 ± 8.0 pg∙mL−1) and Camp2 (32.0 ± 8.7 pg∙mL−1) than at Rest (47.2 ± 11.2 pg∙mL−1) or Regular (53.4 ± 12.6 pg∙mL−1). Furthermore, the change in acylated ghrelin level was negatively correlated with the change in cortisol concentration. This study’s findings suggest that an early-phase physiological stress response may decrease the acylated ghrelin level in male power-trained athletes during an intensive training camp.

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  • Under such conditions, there is a significant secretion of cortisol in the adrenal glands, which increases catabolism and inhibits the regeneration process.

    “Under such conditions, there is a significant secretion of cortisol in the adrenal glands, which undoubtedly increases catabolism and inhibits the regeneration process [42].”

    From Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players (2020) · cites this paper as [42]

    The Discussion identifies the adrenal cortex as the source of cortisol, and Results §3.3 reports significantly higher plasma cortisol at the end of the intensive training camp. The paper does not show that this increase caused greater catabolism or inhibited regeneration; those effects are not established by its measurements. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

  • Intensive training and matches are conducive to the occurrence of stress, both physical and mental.

    “Such conditions are undoubtedly conducive to the occurrence of stress, both physical and mental, resulting from training and competition [42,43].”

    From Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players (2020) · cites this paper as [42]

    The Discussion reports acute physiological stress after high-volume training, supporting the physical-stress part of the claim. The Introduction says excessive training stress can disturb psychological state, but this study found no change in mood or psychological state and did not examine competition or matches. The supplied passages have section labels but no page numbers. (LLM, conf=0.86)

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  • Supplementation with high doses of 5000-10,000 IU/day of vitamin D3 is effective in treating athletes with 25(OH)D deficiency.

    “It is widely known that supplementation with high doses of 5000–10,000 IU/day of vitamin D3 is effective in treating athletes with 25(OH)D deficiency [9,14,42].”

    From Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players (2020) · cites this paper as [42]

    The Dietary Intake methods and Nutritional Intake results discuss energy and macronutrients, not vitamin D treatment. Searches for vitamin D3, 25(OH)D deficiency, and the 5000–10,000 IU/day dose found no passage in our copy addressing the claim. (LLM, conf=0.76)

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Sorted by citations

Authors
Oshima, S., Takehata, C., Sasahara, I., Lee, E., Akama, T., & Taguchi, M.
Affiliations
  • Waseda University (JP)
  • Ajinomoto (Japan) (JP)
  • Waseda Institute for Sport Sciences (JP)
Corresponding author
Taguchi, Motoko
ORCID
Venue
Nutrients
Publisher
MDPI AG
Published
2017-08-21
Volume
9
Issue
8
Pages
912
ISSN
2072-6643 (ISSN-L)
DOI
10.3390/nu9080912
PMC
PMC5579705
OpenAlex
W2749499396
Cited by
13
References
6
Citations by year
2025: 2 · 2023: 1 · 2022: 2 · 2020: 4 · 2019: 1 · 2018: 3
FWCI
1.31
Type
journal article
Language
en
Open access
Licence
Locations
  • Nutrients (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
Keywords
appetite, stress response, high-volume training, cortisol, acylated ghrelin, salivary IgA, mood states, dietary intake, male athletes
MeSH terms
Acylation, Adolescent, Adult, Anthropometry, Appetite, Blood Glucose, Diet, Fatigue, Humans, Hydrocortisone, Immunoglobulin A, Secretory, Insulin, Male, Prospective Studies, Rest, Saliva, Stress, Physiological, Asian People, Ghrelin, Resistance Training, Young Adult, Athletes

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