##Kiecolt-Glaser JK, McGuire L, Robles TF, Glaser R. Psychoneuroimmunology and psychosomatic medicine: back to the future. Psychosomatic medicine. 2002;64(1):15-28.##Pedersen BK, Hoffman-Goetz L. Exercise and the immune system: regulation, integration, and adaptation. Physiological reviews. 2000;80(3):1055-81.##De Oliveira EP, Burini RCJCOiCN, Care M. The impact of physical exercise on the gastrointestinal tract. 2009;12(5):533-8.##Shefer A, Atkinson W, Friedman C. Recommendations of the advisory committee on immunization practices. MMWR. 2011;60:1-45.##Martin SA, Pence BD, Woods JA. Exercise and respiratory tract viral infections. Exercise and sport sciences reviews. 2009;37(4):157.##Vu T, Farish S, Jenkins M, Kelly H. A meta-analysis of effectiveness of influenza vaccine in persons aged 65 years and over living in the community. Vaccine. 2002;20(13-14):1831-6.##Heath GW, Ford ES, Craven TE, Macera CA, Jackson KL, Pate RR. Exercise and the incidence of upper respiratory tract infections. Medicine and science in sports and exercise. 1991;23(2):152-7.##Nieman D, Nehlsen-Cannarella S, Markoff P, Balk-Lamberton A, Yang H, Chritton D, et al. The effects of moderate exercise training on natural killer cells and acute upper respiratory tract infections. International journal of sports medicine. 1990;11(06):467-73.##Ekblom B, Ekblom Ö, Malm C. Infectious episodes before and after a marathon race. Scandinavian journal of medicine & science in sports. 2006;16(4):287-93.## Wong C-M, Lai H-K, Ou C-Q, Ho S-Y, Chan K-P, Thach T-Q, et al. Is exercise protective against influenza-associated mortality? PLoS One. 2008;3(5).##Matthews CE, Ockene IS, Freedson PS, Rosal MC, Merriam PA, Hebert JR. Moderate to vigorous physical activity and risk of upper-respiratory tract infection. Medicine & Science in Sports & Exercise. 2002;34(8):1242-8.##KOSTKA T, BERTHOUZE SE, LACOUR J-R, BONNEFOY M. The symptomatology of upper respiratory tract infections and exercise in elderly people. Medicine & Science in Sports & Exercise. 2000;32(1):46.##Lowder T, Padgett DA, Woods JA. Moderate exercise protects mice from death due to influenza virus. Brain, behavior, and immunity. 2005;19(5):377-80.##Klentrou P, Cieslak T, MacNeil M, Vintinner A, Plyley M. Effect of moderate exercise on salivary immunoglobulin A and infection risk in humans. European journal of applied physiology. 2002;87(2):153-8.##Shimizu K, Kimura F, Akimoto T, Akama T, Otsuki T, Nishijima T, et al. Effects of exercise, age and gender on salivary secretory immunoglobulin A in elderly individuals. Exerc Immunol Rev. 2007;13(55-66).##Fiore AE, Shay DK, Broder K, Iskander JK, Uyeki TM, Mootrey G, et al. Prevention and control of influenza: recommendations of the Advisory Committee on Immunization Practices (ACIP), 2008. MMWR Recommendations and reports: Morbidity and mortality weekly report Recommendations and reports. 2008;57(RR-7):1-60.##Putlur P, Foster C, Miskowski JA, Kane MK, Burton SE, Scheett TP, et al. Alteration of immune function in women collegiate soccer players and college students. Journal of sports science & medicine. 2004;3(4):234.##Gleeson M. Immune function in sport and exercise. Journal of applied physiology. 2007;103(2):693-9.##Moreira A, Delgado L, Moreira P, Haahtela T. Does exercise increase the risk of upper respiratory tract infections? British medical bulletin. 2009;90(1):111-31.##Pedersen B, Bruunsgaard H, Klokker M, Kappel M, MacLean D, Nielsen H, et al. Exercise-induced immunomodulation-possible roles of neuroendocrine and metabolic factors. International journal of sports medicine. 1997;18(S 1):S2-S7.##Cremaschi GA, Gorelik G, Klecha AJ, Lysionek AE, Genaro AM. Chronic stress influences the immune system through the thyroid axis. Life Sciences. 2000;67(26):3171-9.##Pedersen BK, Woods JA, Nieman DC. Exercise-induced immune changes–an influence on metabolism? Trends in immunology. 2001;22(9):473-5.##Barrett B, Hayney MS, Muller D, Rakel D, Ward A, Obasi CN, et al. Meditation or exercise for preventing acute respiratory infection: a randomized controlled trial. The Annals of Family Medicine. 2012;10(4):337-46.##Barrett B, Hayney MS, Muller D, Rakel D, Brown R, Zgierska AE, et al. Meditation or exercise for preventing acute respiratory infection (MEPARI-2): A randomized controlled trial. PloS one. 2018;13(6).##Sloan C, Engels H, Fahlman M, Yarandi H, Davis J. Effects of exercise on S-IGA and URS in postmenopausal women. International journal of sports medicine. 2013;34(01):81-6.##Çiloğlu F. The effect of exercise on salivary IgA levels and the incidence of upper respiratory tract infections in postmenopausal women. Kulak burun bogaz ihtisas dergisi: KBB= Journal of ear, nose, and throat. 2005;15(5-6):112-6.##NIEMAN DC, NEHLSEN-CANNARELLA SL, HENSON DA, KOCH AJ, BUTTERWORTH DE, FAGOAGA OR, et al. Immune response to exercise training and/or energy restriction in obese women. Medicine & Science in Sports & Exercise. 1998;30(5):679-86.##Nieman DC, Henson D, Gusewitch G, Warren BJ, Dotson RC, Butterworth DE, et al. Physical activity and immune function in elderly women. Medicine and science in sports and exercise. 1993;25(7):823-31.##Manzaneque JM, Vera FM, Maldonado EF, Carranque G, Cubero VM, Morell M, et al. Assessment of immunological parameters following a qigong training program. Medical Science Monitor. 2004;10(6):CR264-CR70.##Fornieles G, Rosety M, Elosegui S, Rosety J, Alvero-Cruz J, Garcia N, et al. Salivary testosterone and immunoglobulin A were increased by resistance training in adults with Down syndrome. Brazilian Journal of Medical and Biological Research. 2014;47(4):345-8.##Nieman D, Johanssen L, Lee JW. Infectious episodes in runners before and after a roadrace. The Journal of sports medicine and physical fitness. 1989;29(3):289-96.##Lee HK, Hwang IH, Kim SY, Pyo SY. The effect of exercise on prevention of the common cold: a meta-analysis of randomized controlled trial studies. Korean journal of family medicine. 2014;35(3):119.##