ALTERATIONS OF SALIVARY SIgA DURING TRAINING CAMP IN COLLEGIATE RUGBY FOOTBALL PLAYERS

Yamauchi, Ryohei; Shimizu, Kazuhiro; Furukawa, Takuo; Watanabe, Koichi; Takemura, Masashi; Akama, Takao; Akimoto, Takayuki; Kono, Ichiro

doi:10.7600/jspfsm.58.131

Cited by 5 publications

(3 citation statements)

References 33 publications

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“…Previous studies suggested that intensive exercise training could reduce salivary SIgA levels in athletes [2,20,21] . Subjects in the present study showed lower salivary SIgA levels in the middle of training camp compared to the baseline value ( p < 0.05), and SIgA levels during appearance of URS were signifi cantly lower than those without symptoms ( p < 0.05) [37] . Several studies suggested that reductions in salivary SIgA levels could be related to the appearance of URTI in athletes [8,13,28] .…”

Section: Discussion ▼contrasting

confidence: 46%

Virus Activation and Immune Function During Intense Training in Rugby Football Players

Yamauchi¹,

Shimizu²,

Kimura³

et al. 2011

Int J Sports Med

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Epidemiological studies suggest that highly trained athletes are more susceptible to upper respiratory tract infections (URTI) compared with the general population. Upper respiratory symptoms (URS) often appear as either primary invasion of pathogenic organisms and/or reactivation of latent viruses such as Epstein-Barr virus (EBV). The purpose of this study was to examine the relationship between EBV reactivation and the appearance of URS during intensive training in collegiate rugby football players. We evaluated EBV-DNA expression in saliva and examined the relationship between onset of URS and daily changes in EBV-DNA as well as secretory immunoglobulin A (SIgA) levels among 32 male collegiate rugby football players during a 1-month training camp. The EBV-DNA expression tended to be higher in subjects who exhibited sore throat (p=0.07) and cough (p=0.18) than that of those who had no symptoms, although their differences were not significant. The SIgA level was significantly lower 1 day before the EBV-DNA expression (p<0.05). The number of URS increased along with the EBV-DNA expression and decrease of SIgA levels. These results suggest that the appearance of URS is associated with reactivation of EBV and reduction of SIgA during training.

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Section: Discussion ▼contrasting

confidence: 46%

Virus Activation and Immune Function During Intense Training in Rugby Football Players

Yamauchi¹,

Shimizu²,

Kimura³

et al. 2011

Int J Sports Med

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“…Indeed, the more specifically past study had identified the time course of change of salivary testosterone, cortisol, and IgA along with changes in mood state; and performance capacity during a 2-week taper in judo athletes and a diurnal variation in these salivary markers [29] were observed. Other studies demonstrated that continuous highly intensive training reduces SIgA secretion speed at rest [25, 27, 30-32]. Also, it is clearly shown that exercise-induced weight loss induced a significant decrease in the SIgA flow rate [6, 33, 34].…”

Section: Discussionmentioning

confidence: 99%

Variation of Salivary IgA During Weight Loss Period Before a Competition Among University Judo Players

Hiraoka

Hanaoka²,

Jesmin

et al. 2019

J Clin Med Res

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BackgroundThis study aims to investigate the health condition of university judo athletes during a period of weight loss before a competition, using secretory immunoglobulin A (SIgA) in saliva.MethodsThe subjects were 30 university judo athletes, who were divided into three groups: control group (n = 10), under 5% weight loss group (n = 10), and over 5% weight loss group (n = 10). The items evaluated were body weight measurements, salivary SIgA level and its secretion rates, incidences of symptoms of upper respiratory tract infections, and mental state.ResultsThe over 5% body weight loss group had significantly lower SIgA secretion rates on the first day and third day before the real competition compared to those of the control group. Furthermore, the over 5% body weight loss group had an increased number of symptoms of upper respiratory tract infections. Alterations in mental statuses were also seen, such as decreased vitality and increased fatigue on the day before the competition in the over 5% weight loss group.ConclusionsThis study shows that over 5% body weight loss in judo athletes induces a decrease in the salivary SIgA secretion rate and causes health condition of the body and the mind to deteriorate.

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“…Immune function and psychological state are also disturbed by excessive training stress [ 1 , 5 ]. Several studies have reported that salivary immunoglobulin A (SIgA) level decreases in intensive training interventions [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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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ALTERATIONS OF SALIVARY SIgA DURING TRAINING CAMP IN COLLEGIATE RUGBY FOOTBALL PLAYERS

Cited by 5 publications

References 33 publications

Virus Activation and Immune Function During Intense Training in Rugby Football Players

Virus Activation and Immune Function During Intense Training in Rugby Football Players

Variation of Salivary IgA During Weight Loss Period Before a Competition Among University Judo Players

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

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