ArticlePhysical activity and nutrition2024
Effects of supplement L-theanine on cognitive anxiety, salivary alpha-amylase, and cortisol in archery competition.
Article in Physical activity and nutrition, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
2 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A CE/TA-stratified systematic review and evidence map of matcha and green tea bioactives in endocrine stress regulation: testosterone, cortisol, and the T:C ratio.Frontiers in nutrition · 2026Pooled it
- Effects of L-theanine on cognition, mood and sleep: evidence from human trials.Frontiers in nutrition · 2026Review
Corrections and comments
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Authors and funding
1 author.
Funding
Abstract
purposeArchery 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.
methodsThe 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.
resultsCognitive 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).
conclusionThe 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.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.