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Li M, Ma Z, Yan R, Yin J. The Impact of Physiological and Psychological Fatigue on Work Efficiency: A Case Study of Parcel Sorting Work. SENSORS (BASEL, SWITZERLAND) 2024; 24:5989. [PMID: 39338736 PMCID: PMC11435520 DOI: 10.3390/s24185989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2024] [Revised: 09/07/2024] [Accepted: 09/12/2024] [Indexed: 09/30/2024]
Abstract
The popularity of online shopping in China has increased significantly, creating new development opportunities for the express delivery industry. However, the rapid expansion of the express industry has also created challenges in the parcel sorting process. The demanding nature of parcel sorting work, which is characterized by intense and prolonged repetitive tasks, makes individuals particularly vulnerable to the effects of fatigue. Fatigue is a complex condition that encompasses both physiological and psychological exhaustion. It often results in reduced energy levels and diminished functionality, significantly impacting an individual's performance at work and their overall well-being. This study aimed to investigate how physiological and psychological fatigue affects sorting efficiency and to identify appropriate rest periods that will allow employees to maintain their performance levels. The research involved fifteen participants who took part in a 60 min continuous sorting experiment and a similar experiment with scheduled breaks. During both trials, we collected data on participants' electromyography (EMG) and electrodermal activity (EDA), as well as subjective fatigue ratings (RPE). Signal features such as the median frequency (MF) of EMG and the skin conductance level (SCL) were analyzed to assess physiological and psychological fatigue, respectively. The results show that physiological fatigue mainly affects sorting efficiency in the first 30 min, while psychological fatigue becomes more influential in the following half-hour period. In addition, subjective fatigue levels during the first 30 min are primarily determined by psychological factors, while beyond that point, both physiological and psychological fatigue contribute to subjective fatigue. Rest periods of 415-460 s, based on EDA recovery times, effectively support sorting efficiency and participants' recovery. This study highlights the complex ways in which fatigue affects parcel sorting performance and provides valuable theoretical and practical insights for establishing labor quotas and optimizing work schedules in the parcel sorting industry.
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Affiliation(s)
- Miaomiao Li
- School of Economics and Management, Beijing Information Science and Technology University, Beijing 100192, China; (M.L.); (J.Y.)
| | - Zuqin Ma
- School of Economics and Management, Beijing Information Science and Technology University, Beijing 100192, China; (M.L.); (J.Y.)
| | - Rui Yan
- School of Economics and Management, University of Science and Technology Beijing, Beijing 100083, China;
| | - Jielin Yin
- School of Economics and Management, Beijing Information Science and Technology University, Beijing 100192, China; (M.L.); (J.Y.)
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2
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Lee SB, Woo TW, Baek DC, Son CG. A standardized herbal combination of Astragalus membranaceus and Paeonia japonica promotes skeletal muscle hypertrophy in a treadmill exercise mouse model. Front Nutr 2024; 11:1362550. [PMID: 38966418 PMCID: PMC11223055 DOI: 10.3389/fnut.2024.1362550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 05/29/2024] [Indexed: 07/06/2024] Open
Abstract
Background Maintaining a normal range of muscle mass and function is crucial not only for sustaining a healthy life but also for preventing various disorders. Numerous nutritional or natural resources are being explored for their potential muscle hypertrophic properties. Aim We aimed to evaluate the muscle hypertrophic effects of APX, a 1:1 mixture of Astragalus membranaceus and Paeonia japonica. In addition to the myotube differentiation cell assay, we utilized a weighted exercise-based animal model and evaluated changes in muscle hypertrophy using dual-energy X-ray absorptiometry (DXA) and histological analysis. Results The 8-week treadmill exercise led to notable decreases in body weight and fat mass but an increase in muscle mass compared to the control group. Administration of APX significantly accelerated muscle mass gain (p < 0.05) without altering body weight or fat mass compared to the exercise-only group. This muscle hypertrophic effect of APX was consistent with the histologic size of muscle fibers in the gastrocnemius (p > 0.05) and rectus femoris (p < 0.05), as well as the regulation of myogenic transcription factors (MyoD and myogenin), respectively. Furthermore, APX demonstrated a similar action to insulin-like growth factor 1, influencing the proliferation of C2C12 myoblast cells (p < 0.01) and their differentiation into myotubes (p < 0.05) compared to the control group. Conclusion The present study provides experimental evidence that APX has muscle hypertrophic effects, and its underlying mechanisms would involve the modulation of MyoD and myogenin.
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Affiliation(s)
| | | | | | - Chang-Gue Son
- Institute of Traditional Medicine and Bioscience, Daejeon University, Daejeon, Republic of Korea
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Mallardo M, Daniele A, Musumeci G, Nigro E. A Narrative Review on Adipose Tissue and Overtraining: Shedding Light on the Interplay among Adipokines, Exercise and Overtraining. Int J Mol Sci 2024; 25:4089. [PMID: 38612899 PMCID: PMC11012884 DOI: 10.3390/ijms25074089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 03/30/2024] [Accepted: 04/01/2024] [Indexed: 04/14/2024] Open
Abstract
Lifestyle factors, particularly physical inactivity, are closely linked to the onset of numerous metabolic diseases. Adipose tissue (AT) has been extensively studied for various metabolic diseases such as obesity, type 2 diabetes, and immune system dysregulation due to its role in energy metabolism and regulation of inflammation. Physical activity is increasingly recognized as a powerful non-pharmacological tool for the treatment of various disorders, as it helps to improve metabolic, immune, and inflammatory functions. However, chronic excessive training has been associated with increased inflammatory markers and oxidative stress, so much so that excessive training overload, combined with inadequate recovery, can lead to the development of overtraining syndrome (OTS). OTS negatively impacts an athlete's performance capabilities and significantly affects both physical health and mental well-being. However, diagnosing OTS remains challenging as the contributing factors, signs/symptoms, and underlying maladaptive mechanisms are individualized, sport-specific, and unclear. Therefore, identifying potential biomarkers that could assist in preventing and/or diagnosing OTS is an important objective. In this review, we focus on the possibility that the endocrine functions of AT may have significant implications in the etiopathogenesis of OTS. During physical exercise, AT responds dynamically, undergoing remodeling of endocrine functions that influence the production of adipokines involved in regulating major energy and inflammatory processes. In this scenario, we will discuss exercise about its effects on AT activity and metabolism and its relevance to the prevention and/or development of OTS. Furthermore, we will highlight adipokines as potential markers for diagnosing OTS.
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Affiliation(s)
- Marta Mallardo
- Department of Molecular and Biotechnological Medicine, University of Naples “Federico II”, 80131 Naples, Italy;
- CEINGE-Biotechnologies Advances S.c.a r.l., Via G. Salvatore 486, 80145 Naples, Italy;
| | - Aurora Daniele
- Department of Molecular and Biotechnological Medicine, University of Naples “Federico II”, 80131 Naples, Italy;
- CEINGE-Biotechnologies Advances S.c.a r.l., Via G. Salvatore 486, 80145 Naples, Italy;
| | - Giuseppe Musumeci
- Department of Biomedical and Biotechnological Sciences, Anatomy, Histology and Movement Sciences Section, School of Medicine, University of Catania, Via S. Sofia 87, 95123 Catania, Italy
- Research Center on Motor Activities (CRAM), University of Catania, 95123 Catania, Italy
| | - Ersilia Nigro
- CEINGE-Biotechnologies Advances S.c.a r.l., Via G. Salvatore 486, 80145 Naples, Italy;
- Department of Pharmaceutical, Biological, Environmental Sciences and Technologies, University of Campania “Luigi Vanvitelli”, Via G. Vivaldi 42, 81100 Caserta, Italy
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Takami M, Aoi W, Matsumoto K, Kato Y, Kobayashi Y, Kuwahata M. High-intensity exercise impairs intestinal barrier function by generating oxidative stress. J Clin Biochem Nutr 2024; 74:136-140. [PMID: 38510689 PMCID: PMC10948349 DOI: 10.3164/jcbn.23-96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/07/2023] [Indexed: 03/22/2024] Open
Abstract
The intestine functions as a barrier preventing the entry of extrinsic factors into the body. This barrier function is disrupted by oxidative damage along with an impaired mucosal layer. Excessive exercise can generate oxidative stress in the intestinal tissue; however, the effect of exercise-induced oxidative stress on intestinal permeability is unclear. In this study, we examined the involvement of oxidative stress in barrier function of the ileum of mice following high-intensity exercise. Male ICR mice (12-week-old) were divided into sedentary and exercise groups. Mice in the exercise group underwent a single bout of treadmill running, and the ileum was collected for histological and biochemical analyses. Plasma fluorescence intensity level after oral administration of fluorescein isothiocyanate-dextran gradually increased until 30 min after exercise in response to intensity of exercise. Relatively high levels of oxidative proteins and low level of claudin-1, a tight-junction protein, were observed in the exercise group. Treatment with a xanthine oxidase inhibitor suppressed exercise-induced increases in intestinal permeability. Moreover, excessive exercise training for two weeks led to relatively high intestinal permeability at rest. These results suggest that high-intensity exercise increases intestinal permeability and tight junction damage, which may be mediated by oxidative stress.
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Affiliation(s)
- Maki Takami
- Laboratory of Nutrition Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522, Japan
| | - Wataru Aoi
- Laboratory of Nutrition Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522, Japan
| | - Karin Matsumoto
- Laboratory of Nutrition Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522, Japan
| | - Yoji Kato
- Laboratory of Free Radical and Food Function, School of Human Science and Environment, University of Hyogo, 1-1-12 Shinzaikehon-cho, Himeji, Hyogo 670-0092, Japan
| | - Yukiko Kobayashi
- Laboratory of Nutrition Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522, Japan
| | - Masashi Kuwahata
- Laboratory of Nutrition Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522, Japan
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la Torre ME, Monda A, Messina A, de Stefano MI, Monda V, Moscatelli F, Tafuri F, Saraiello E, Latino F, Monda M, Messina G, Polito R, Tafuri D. The Potential Role of Nutrition in Overtraining Syndrome: A Narrative Review. Nutrients 2023; 15:4916. [PMID: 38068774 PMCID: PMC10708264 DOI: 10.3390/nu15234916] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/13/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
Competition between athletes and an increase in sporting knowledge have greatly influenced training methods while increasing the number of them more and more. As a result, the number of athletes who have increased the number and intensity of their workouts while decreasing recovery times is rising. Positive overtraining could be considered a natural and fundamental process when the result is adaptation and improved performance; however, in the absence of adequate recovery, negative overtraining could occur, causing fatigue, maladaptation, and inertia. One of the earliest forms of fatigue is overreaching. It is considered to be an accumulation of training that leads to reduced sports performance, requiring days or weeks to recover. Overreaching, if followed by adequate recovery, can lead to an increase in athletic performance. Nonetheless, if overreaching becomes extreme, combined with additional stressors, it could lead to overtraining syndrome (OTS). OTS, caused by systemic inflammation, leads to central nervous system (CNS) effects, including depressed mood, further inflammation, central fatigue, and ultimately neurohormonal changes. There are therefore not only physiological, biochemical, and immunological but also psychological symptoms or markers that must be considered, independently or together, being intrinsically linked with overtraining, to fully understand OTS. However, to date, there are very few published studies that have analyzed how nutrition in its specific food aspects, if compromised during OTS, can be both etiology and consequence of the syndrome. To date, OTS has not yet been fully studied, and the topic needs further research. The purpose of this narrative review is therefore to study how a correct diet and nutrition can influence OTS in all its aspects, from prevention to treatment.
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Affiliation(s)
- Maria Ester la Torre
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (M.E.l.T.); (M.I.d.S.); (G.M.)
| | - Antonietta Monda
- Department of Experimental Medicine, Section of Human Physiology, Unit of Dietetics and Sports Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (A.M.); (M.M.)
| | - Antonietta Messina
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy;
| | - Maria Ida de Stefano
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (M.E.l.T.); (M.I.d.S.); (G.M.)
| | - Vincenzo Monda
- Department of Economics, Law, Cybersecurity, and Sports Sciences, University of Naples “Parthenope”, 80131 Naples, Italy; (V.M.); (E.S.); (D.T.)
| | - Fiorenzo Moscatelli
- Department of Human Sciences, Telematic University Pegaso, 80100 Naples, Italy; (F.M.); (F.L.)
| | - Francesco Tafuri
- Heracle Lab Research in Educational Neuroscience, Niccolò Cusano University, 00166 Roma, Italy;
| | - Emma Saraiello
- Department of Economics, Law, Cybersecurity, and Sports Sciences, University of Naples “Parthenope”, 80131 Naples, Italy; (V.M.); (E.S.); (D.T.)
| | - Francesca Latino
- Department of Human Sciences, Telematic University Pegaso, 80100 Naples, Italy; (F.M.); (F.L.)
| | - Marcellino Monda
- Department of Experimental Medicine, Section of Human Physiology, Unit of Dietetics and Sports Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (A.M.); (M.M.)
| | - Giovanni Messina
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (M.E.l.T.); (M.I.d.S.); (G.M.)
| | - Rita Polito
- Department of Clinical and Experimental Medicine, University of Foggia, 71122 Foggia, Italy; (M.E.l.T.); (M.I.d.S.); (G.M.)
| | - Domenico Tafuri
- Department of Economics, Law, Cybersecurity, and Sports Sciences, University of Naples “Parthenope”, 80131 Naples, Italy; (V.M.); (E.S.); (D.T.)
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Talvas J, Norgieux C, Burban E, Giraudet C, Patrac V, Salles J, Rigaudière JP, Capel F, le Bacquer O, Ouchchane L, Richard R, Walrand S. Vitamin D deficiency contributes to overtraining syndrome in excessive trained C57BL/6 mice. Scand J Med Sci Sports 2023; 33:2149-2165. [PMID: 37452567 DOI: 10.1111/sms.14449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/18/2023]
Abstract
Overtraining syndrome is a condition resulting from excessive training load associated with inadequate recovery and poor sleep quality, leading to performance decrements and fatigue. Here we hypothesized that vitamin D (VitD) deficiency is a lead factor in the development of the overtraining syndrome. To test this hypothesis, two groups of 60-week-old C57BL/6 mice followed a 16-week excessive eccentric-based overtraining by excessive downhill running with or without dietary VitD depletion (EX and EX-D- groups). Two control groups were trained by uphill running at the same load with or without VitD depletion (CX and CX-D- groups). Handgrip strength decreased throughout the protocol for all groups but the decrease was sharper in EX-D- group (VitD × training, p = 0.0427). At the end of the protocol, the mass of Triceps brachii muscle, which is heavily stressed by eccentric contractions, was reduced in eccentric-trained groups (training effect, p = 0.0107). This atrophy was associated with a lower concentration of the anabolic myokine IL-15 (training effect, p = 0.0314) and a tendency to a higher expression of the atrogene cathepsin-L (training effect, p = 0.0628). VitD depletion led to a 50% decrease of the fractional protein synthesis rate in this muscle (VitD effect, p = 0.0004) as well as decreased FGF21 (VitD effect, p = 0.0351) and increased osteocrin (VitD effect, p = 0.038) concentrations that would lead to metabolic defects. Moreover, the proportion of anti-inflammatory Th2 lymphocytes was significantly decreased by the combination of eccentric training with VitD depletion (vitD × training, p = 0.0249) suggesting a systemic inflammation. Finally, exploratory behavior time of mice was decreased by VitD depletion (VitD effect, p = 0.0146) suggesting a cognitive dysfunction. Our results suggest that VitD deficiency exacerbates the effects of overtraining.
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Affiliation(s)
- J Talvas
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - C Norgieux
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - E Burban
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - C Giraudet
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - V Patrac
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - J Salles
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - J-P Rigaudière
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - F Capel
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - O le Bacquer
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - L Ouchchane
- CHU Clermont-Ferrand, Biostatistics and Medical Computing Unit, Clermont-Ferrand, France
| | - R Richard
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
| | - S Walrand
- Human Nutrition Unit, UMR 1019 INRAE/UCA, CRNH-Auvergne, Clermont-Ferrand, France
- Department of Clinical Nutrition, Clermont-Ferrand University Hospital Center, Clermont-Ferrand, France
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Chung Y, Hsiao YT, Huang WC. Correction: Chung et al. Physiological and Psychological Effects of Treadmill Overtraining Implementation. Biology 2021, 10, 515. BIOLOGY 2023; 12:996. [PMID: 37508474 PMCID: PMC10368150 DOI: 10.3390/biology12070996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023]
Abstract
In the original publication [...].
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Affiliation(s)
- Yi Chung
- College of Human Development and Health, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan
| | - Yi-Ting Hsiao
- Department of Exercise and Health Science, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan
| | - Wen-Ching Huang
- Department of Exercise and Health Science, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 11031, Taiwan
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Nash D, Hughes MG, Butcher L, Aicheler R, Smith P, Cullen T, Webb R. IL-6 signaling in acute exercise and chronic training: Potential consequences for health and athletic performance. Scand J Med Sci Sports 2023; 33:4-19. [PMID: 36168944 PMCID: PMC10092579 DOI: 10.1111/sms.14241] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/25/2022] [Accepted: 09/20/2022] [Indexed: 12/13/2022]
Abstract
The cytokine interleukin-6 (IL-6) is involved in a diverse set of physiological processes. Traditionally, IL-6 has been thought of in terms of its inflammatory actions during the acute phase response and in chronic conditions such as rheumatoid arthritis and obesity. However, IL-6 is also an important signaling molecule during exercise, being acutely released from working muscle fibers with increased exercise duration, intensity, and muscle glycogen depletion. In this context, IL-6 enables muscle-organ crosstalk, facilitating a coordinated response to help maintain muscle energy homeostasis, while also having anti-inflammatory actions. The range of actions of IL-6 can be explained by its dichotomous signaling pathways. Classical signaling involves IL-6 binding to a cell-surface receptor (mbIL-6R; present on only a small number of cell types) and is the predominant signaling mechanism during exercise. Trans-signaling involves IL-6 binding to a soluble version of its receptor (sIL-6R), with the resulting complex having a much greater half-life and the ability to signal in all cell types. Trans-signaling drives the inflammatory actions of IL-6 and is the predominant pathway in disease. A single nucleotide polymorphism (rs2228145) on the IL-6R gene can modify the classical/trans-signaling balance through increasing the levels of sIL-6R. This SNP has clinical significance, having been linked to inflammatory conditions such as rheumatoid arthritis and type 1 diabetes, as well as to the severity of symptoms experienced with COVID-19. This review will describe how acute exercise, chronic training and the rs2228145 SNP can modify the IL-6 signaling pathway and the consequent implications for health and athletic performance.
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Affiliation(s)
- Dan Nash
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Michael G Hughes
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Lee Butcher
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Rebecca Aicheler
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Paul Smith
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
| | - Tom Cullen
- Research Centre for Sport, Exercise and Life Sciences, Coventry University, Coventry, UK
| | - Richard Webb
- School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK
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Baker C, Hunt J, Piasecki J, Hough J. Lymphocyte and dendritic cell response to a period of intensified training in young healthy humans and rodents: A systematic review and meta-analysis. Front Physiol 2022; 13:998925. [PMID: 36439269 PMCID: PMC9691956 DOI: 10.3389/fphys.2022.998925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 10/14/2022] [Indexed: 01/25/2023] Open
Abstract
Background: Intensified training coupled with sufficient recovery is required to improve athletic performance. A stress-recovery imbalance can lead to negative states of overtraining. Hormonal alterations associated with intensified training, such as blunted cortisol, may impair the immune response. Cortisol promotes the maturation and migration of dendritic cells which subsequently stimulate the T cell response. However, there are currently no clear reliable biomarkers to highlight the overtraining syndrome. This systematic review and meta-analysis examined the effect of intensified training on immune cells. Outcomes from this could provide insight into whether these markers may be used as an indicator of negative states of overtraining. Methods: SPORTDiscus, PUBMED, Academic Search Complete, Scopus and Web of Science were searched until June 2022. Included articles reported on immune biomarkers relating to lymphocytes, dendritic cells, and cytokines before and after a period of intensified training, in humans and rodents, at rest and in response to exercise. Results: 164 full texts were screened for eligibility. Across 57 eligible studies, 16 immune biomarkers were assessed. 7 were assessed at rest and in response to a bout of exercise, and 9 assessed at rest only. Included lymphocyte markers were CD3+, CD4+ and CD8+ T cell count, NK cell count, NK Cytolytic activity, lymphocyte proliferation and CD4/CD8 ratio. Dendritic cell markers examined were CD80, CD86, and MHC II expression. Cytokines included IL-1β, IL-2, IL-10, TNF-α and IFN-γ. A period of intensified training significantly decreased resting total lymphocyte (d= -0.57, 95% CI -0.30) and CD8+ T cell counts (d= -0.37, 95% CI -0.04), and unstimulated plasma IL-1β levels (d= -0.63, 95% CI -0.17). Resting dendritic cell CD86 expression significantly increased (d = 2.18, 95% CI 4.07). All other biomarkers remained unchanged. Conclusion: Although some biomarkers alter after a period of intensified training, definitive immune biomarkers are limited. Specifically, due to low study numbers, further investigation into the dendritic cell response in human models is required.
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Affiliation(s)
- Carla Baker
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom,*Correspondence: Carla Baker,
| | - John Hunt
- Medical Technologies Innovation Facility, Nottingham Trent University, Nottingham, United Kingdom
| | - Jessica Piasecki
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom
| | - John Hough
- SHAPE Research Centre, Department of Sport Science, Nottingham Trent University, Nottingham, United Kingdom
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Effects of 6-Week Supplementation with GliSODin on Parameters of Muscle Damages, Metabolic, and Work Performance at International Level Rowers after Specific Maximal Effort. BIOLOGY 2022; 11:biology11101437. [PMID: 36290341 PMCID: PMC9598269 DOI: 10.3390/biology11101437] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/23/2022] [Accepted: 08/31/2022] [Indexed: 01/24/2023]
Abstract
This study aimed to investigate the effect of supplementation with plant origin superoxide dismutase (SOD), GliSODin, on parameters of muscle damage, metabolic, and work performance at international level rowers. Twenty-eight rowers were included in a randomized, double-blind study. The study was conducted during a 6-week preparation period. At the beginning of the study and after 6 weeks of the supplementation period, all rowers were tested on a rowing ergometer. Blood samples were taken from the antecubital vein before and after every ergometer testing. Muscle damage markers creatine kinase (CK) and lactate dehydrogenase (LDH), total antioxidant capacity (TAC), inflammation parameters interleukin-6 (IL-6), and C-reactive protein (CRP) were measured. Rowing performance was assessed by lactate level in capillary blood and power output on the rowing ergometer. After supplementation, experimental group had significantly lower CK (p = 0.049) and IL-6 (p = 0.035) before and IL-6 (p = 0.050) after exhausting exercise on ergometer. Relative change of power output at 4 mmol/L concentration of lactate in blood, considering the initial and final test, was significantly higher (p = 0.020) in the supplemented group. It was concluded that GliSODin could be considered a good supplement in preventing some deleterious effects of intensive physical activity, including inflammation and muscle damage, and consequently, to enable a better rowing performance of elite rowers.
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