Effects of Supplement L-theanine on Cognitive Anxiety, Salivary Alpha-amylase, and Cortisol in Archery Competition

Overview

Journal Phys Act Nutr

Date 2025 Feb 11

PMID 39934632

Authors

In-Soo Lim

Affiliations

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Abstract

Purpose: Archery is a representative sport requiring high levels of concentration. Accordingly, assessing participants' physiological and psychological factors related to tension, anxiety, and stress represents a valuable resource for enhancing performance. This study examines the impact of L-theanine administration on archers' cognitive anxiety levels, salivary alpha-amylase (sAA), and salivary cortisol (sC) in archery competition.

Methods: The study included 18 athletes from women's colleges who participated in the 50-meter individual competition at the 40th president's cup national archery competition in June 2023. Athletes' anxiety levels were assessed on a Likert scale, ranging from 1 "not at all" to 10 "extremely anxious." Saliva samples were collected 30, 20, and 10 minutes before and 20 minutes after the game. Repeated measures of the general linear model ANOVA were performed to compare the mean values of sAA and anxiety level.

Results: Cognitive anxiety levels were significantly reduced in the treatment compared to the placebo group at 10 minutes before the game (p<.05); sAA levels were significantly reduced in the treatment group compared to the placebo group at 20 and 10 minutes before the game (pre-20 and pre-10, respectively); and sC levels were significantly reduced in the treatment compared to the placebo group at 10 minutes before the game (p<.05).

Conclusion: The findings demonstrate that L-theanine treatment is an efficacious intervention for reducing cognitive anxiety, sAA, and sC levels in sports. Therefore, it is recommended to alleviate competitive anxiety in sports requiring high concentration levels such as archery.

References

Strahler J, Mueller A, Rosenloecher F, Kirschbaum C, Rohleder N . Salivary alpha-amylase stress reactivity across different age groups. Psychophysiology. 2010; 47(3):587-95. DOI: 10.1111/j.1469-8986.2009.00957.x. View

Yilmaz U, Buzdagli Y, Polat M, Bakir Y, Ozhanci B, Alkazan S . Effect of single or combined caffeine and L-Theanine supplementation on shooting and cognitive performance in elite curling athletes: a double-blind, placebo-controlled study. J Int Soc Sports Nutr. 2023; 20(1):2267536. PMC: 10566444. DOI: 10.1080/15502783.2023.2267536. View

Scheid L, Ellinger S, Alteheld B, Herholz H, Ellinger J, Henn T . Kinetics of L-theanine uptake and metabolism in healthy participants are comparable after ingestion of L-theanine via capsules and green tea. J Nutr. 2012; 142(12):2091-6. DOI: 10.3945/jn.112.166371. View

van Stegeren A, Rohleder N, Everaerd W, Wolf O . Salivary alpha amylase as marker for adrenergic activity during stress: effect of betablockade. Psychoneuroendocrinology. 2005; 31(1):137-41. DOI: 10.1016/j.psyneuen.2005.05.012. View

Nater U, La Marca R, Florin L, Moses A, Langhans W, Koller M . Stress-induced changes in human salivary alpha-amylase activity -- associations with adrenergic activity. Psychoneuroendocrinology. 2005; 31(1):49-58. DOI: 10.1016/j.psyneuen.2005.05.010. View

Thoma M, Joksimovic L, Kirschbaum C, Wolf J, Rohleder N . Altered salivary alpha-amylase awakening response in Bosnian War refugees with posttraumatic stress disorder. Psychoneuroendocrinology. 2011; 37(6):810-7. DOI: 10.1016/j.psyneuen.2011.09.013. View

Rohleder N, Nater U . Determinants of salivary alpha-amylase in humans and methodological considerations. Psychoneuroendocrinology. 2009; 34(4):469-85. DOI: 10.1016/j.psyneuen.2008.12.004. View

Hidese S, Ogawa S, Ota M, Ishida I, Yasukawa Z, Ozeki M . Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients. 2019; 11(10). PMC: 6836118. DOI: 10.3390/nu11102362. View

White D, de Klerk S, Woods W, Gondalia S, Noonan C, Scholey A . Anti-Stress, Behavioural and Magnetoencephalography Effects of an L-Theanine-Based Nutrient Drink: A Randomised, Double-Blind, Placebo-Controlled, Crossover Trial. Nutrients. 2016; 8(1). PMC: 4728665. DOI: 10.3390/nu8010053. View

10.

Kimura K, Ozeki M, Juneja L, Ohira H . L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2006; 74(1):39-45. DOI: 10.1016/j.biopsycho.2006.06.006. View

11.

Unno K, Sumiyoshi A, Konishi T, Hayashi M, Taguchi K, Muguruma Y . Theanine, the Main Amino Acid in Tea, Prevents Stress-Induced Brain Atrophy by Modifying Early Stress Responses. Nutrients. 2020; 12(1). PMC: 7019546. DOI: 10.3390/nu12010174. View

12.

Monasterio E, Mei-Dan O, Hackney A, Lane A, Zwir I, Rozsa S . Stress reactivity and personality in extreme sport athletes: The psychobiology of BASE jumpers. Physiol Behav. 2016; 167:289-297. DOI: 10.1016/j.physbeh.2016.09.025. View

13.

Lawrence H . Salivary markers of systemic disease: noninvasive diagnosis of disease and monitoring of general health. J Can Dent Assoc. 2002; 68(3):170-4. View

14.

Mehrsafar A, Strahler J, Gazerani P, Khabiri M, Jaenes Sanchez J, Moosakhani A . The effects of mindfulness training on competition-induced anxiety and salivary stress markers in elite Wushu athletes: A pilot study. Physiol Behav. 2019; 210:112655. DOI: 10.1016/j.physbeh.2019.112655. View