Research Article

Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers

Volume: 11 Number: 4 December 31, 2025
TR EN

Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers

Abstract

Aim: The aim of this study is to determine the effect of a 1000 mg tryptophan supplement, used in addition to regular swim training for 8 weeks, on the swimming performance of young male swimmers. Methods: A total of 21 swimmers aged between 16 and 22 years participated in the study. The swimmers were divided into two groups: the tryptophan-supplemented training group (age: 17.36±1.21 years, height: 182.64±7.34 cm, body weight: 73.18±9.68 kg, BMI: 21.88±1.97 kg/m²) and the non-supplemented training group (age: 20.10±1.37 years, height: 182.00±5.79 cm, body weight: 79.80±7.95 kg, BMI: 24.06±1.82 kg/m²). The training group receiving tryptophan supplementation consumed 500 mg of tryptophan twice daily, once in the morning and once in the evening, for a total daily dose of 1000 mg over an 8-week period. The non-supplemented training group did not receive any nutritional supplements. All athletes completed their routine preparatory training program, consisting of two training sessions per day, 12 sessions per week, with one full rest day each week. Blood samples and 1000-m maximal swimming performance times were collected from both groups twice: once before the beginning of the training period and once at the end of the 8 weeks. Results: A statistically significant difference was found in the 1000-m swimming performance and sleep quality of the swimmers in the training group who used tryptophan supplementation (p<0.05). Conclusion: Regular use of tryptophan supplementation for 8 weeks increased swimming performance and improved sleep quality.

Keywords

References

  1. Ağargün, M.Y., Kara, H., & Anlar, O. (1996). Pittsburgh uyku kalitesi indeksinin geçerliği ve güvenirliği. Türk Psikiyatri Dergisi, 7, 107-115.
  2. AlDabal, L., & BaHammam, A. S. (2011). Metabolic, endocrine, and immune consequences of sleep deprivation. The open respiratory medicine journal, 5, 31. https://doi.org/10.2174/1874306401105010031
  3. Alpar, R. (1994). Yüzme ve Sutopu Antrenmanlarının Temelleri. Yüzme Atlama Sutopu federasyonu.
  4. Arnulf, I., Konofal, E., Merino–Andreu, M., Houeto, J. L., Mesnage, V., Welter, M. L., ... Agid, Y. (2002). Parkinson’s disease and sleepiness: an integral part of PD. Neurology, 58(7), 1019-1024. https://doi.org/10.1212/WNL.58.7.1019
  5. Bozdoğan, A. (2006). Yüzme. Morpa Yayınları.
  6. Bozdoğan, A. & Özüak, A. (2003). Stilleriyle temel yüzme. İlpress Basım ve Yayın.
  7. Budgett, R. (1998). Fatigue and underperformance in athletes: the overtraining syndrome. British Journal of Sports Medicine, 32(2), 107-110. https://doi.org/10.1136/bjsm.32.2.107
  8. Duygu, A. (2016) Dr. Aminoasit (Baskı 2). İstanbul Tıp Kitapevi.

Details

Primary Language

English

Subjects

Sports Training, Exercise Physiology

Journal Section

Research Article

Publication Date

December 31, 2025

Submission Date

November 10, 2024

Acceptance Date

December 29, 2025

Published in Issue

Year 2025 Volume: 11 Number: 4

APA
Saygılı, B., & Çamlıgüney, A. F. (2025). Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers. International Journal of Sport Exercise and Training Sciences - IJSETS, 11(4), 356-361. https://izlik.org/JA25GS45PF
AMA
1.Saygılı B, Çamlıgüney AF. Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers. Int J Sport, Exerc & Train Sci. 2025;11(4):356-361. https://izlik.org/JA25GS45PF
Chicago
Saygılı, Bahar, and Asiye Filiz Çamlıgüney. 2025. “Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers”. International Journal of Sport Exercise and Training Sciences - IJSETS 11 (4): 356-61. https://izlik.org/JA25GS45PF.
EndNote
Saygılı B, Çamlıgüney AF (December 1, 2025) Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers. International Journal of Sport Exercise and Training Sciences - IJSETS 11 4 356–361.
IEEE
[1]B. Saygılı and A. F. Çamlıgüney, “Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers”, Int J Sport, Exerc & Train Sci, vol. 11, no. 4, pp. 356–361, Dec. 2025, [Online]. Available: https://izlik.org/JA25GS45PF
ISNAD
Saygılı, Bahar - Çamlıgüney, Asiye Filiz. “Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers”. International Journal of Sport Exercise and Training Sciences - IJSETS 11/4 (December 1, 2025): 356-361. https://izlik.org/JA25GS45PF.
JAMA
1.Saygılı B, Çamlıgüney AF. Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers. Int J Sport, Exerc & Train Sci. 2025;11:356–361.
MLA
Saygılı, Bahar, and Asiye Filiz Çamlıgüney. “Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers”. International Journal of Sport Exercise and Training Sciences - IJSETS, vol. 11, no. 4, Dec. 2025, pp. 356-61, https://izlik.org/JA25GS45PF.
Vancouver
1.Bahar Saygılı, Asiye Filiz Çamlıgüney. Effect of Tryptophan Supplementation on the Swimming Performance of Swimmers. Int J Sport, Exerc & Train Sci [Internet]. 2025 Dec. 1;11(4):356-61. Available from: https://izlik.org/JA25GS45PF