Effect of Dietary Patterns on Athletic Performance, Functional Fatigue, and Muscle Damage and Inflammatory Markers in Elite Taekwondo Athletes

The Effect of Eight Weeks of Three-Meal and Six-Meal Dietary Patterns Combined with a 12-Hour Overnight Fast on Athletic Performance, Functional Fatigue, and Muscle Damage and Inflammatory Markers in Elite Taekwondo Athletes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20240517061818N2

Enrollment

Registered

2026-02-18

Start date

2026-01-06

Completion date

Unknown

Last updated

2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Taekwondo Player. General health check-up of sports teams

Interventions

Intervention 1: Intervention Group 1:Participants will be assigned to a six-meal dietary intervention, consisting of six eating occasions per day (three main meals and three snacks), while observing a

0–10 scale), with wrist-worn smartwatches used for heart rate monitoring. Training quality and safety will be ensured by a qualified coach, so that the effects of exercise on blood variables and athle

Eligibility

Sex/Gender

Male

Age

18 Years to 25 Years

Inclusion criteria

Inclusion criteria: Participation in the sport of Taekwondo as an elite athlete No injury or neurological issue No use of any medication or supplement that could affect athletic performance (in the past six months)

Exclusion criteria

Exclusion criteria: Failure to provide written informed consent to participate in the study

Design outcomes

Primary

Measure	Time frame
Sports performance. Timepoint: Before and 48 hours after the intervention. Method of measurement: Sport performance will be assessed using a modified version of the questionnaire developed by Hsieh W-L et al., which was designed with input from three Taekwondo experts holding black belts and certified by the World Taekwondo Headquarters.;Functional fatigue. Timepoint: Before and 48 hours after the intervention. Method of measurement: This study will use the exercise-induced fatigue protocol previously validated in Taekwondo by Mirjani et al. (2017).;Serum creatine kinase (CK). Timepoint: Before and 48 hours after the intervention. Method of measurement: Serum creatine kinase (CK): Measured using the Hyasen commercial kit (CK-MB, China).;High-sensitivity C-reactive protein (hs-CRP) level. Timepoint: Before and 48 hours after the intervention. Method of measurement: hs-CRP: Measured using the AccuBind ELISA Kit (Monobind, USA).Iran).;Lactate dehydrogenase (LDH) levels. Timepoint: Before and 48 hours after the intervention. Method of measurement: Lactate dehydrogenase (LDH): Measured using the Abcam commercial kit (ab102526, UK).;Interleukin-6 (IL-6) level. Timepoint: Before and 48 hours after the intervention. Method of measurement: IL-6: Measured using a sandwich ELISA kit (Karmania Pars Gene, KPG HIL6,.	—

Measure

Time frame

Sports performance. Timepoint: Before and 48 hours after the intervention. Method of measurement: Sport performance will be assessed using a modified version of the questionnaire developed by Hsieh W-L et al., which was designed with input from three Taekwondo experts holding black belts and certified by the World Taekwondo Headquarters.;Functional fatigue. Timepoint: Before and 48 hours after the intervention. Method of measurement: This study will use the exercise-induced fatigue protocol previously validated in Taekwondo by Mirjani et al. (2017).;Serum creatine kinase (CK). Timepoint: Before and 48 hours after the intervention. Method of measurement: Serum creatine kinase (CK): Measured using the Hyasen commercial kit (CK-MB, China).;High-sensitivity C-reactive protein (hs-CRP) level. Timepoint: Before and 48 hours after the intervention. Method of measurement: hs-CRP: Measured using the AccuBind ELISA Kit (Monobind, USA).Iran).;Lactate dehydrogenase (LDH) levels. Timepoint: Before and 48 hours after the intervention. Method of measurement: Lactate dehydrogenase (LDH): Measured using the Abcam commercial kit (ab102526, UK).;Interleukin-6 (IL-6) level. Timepoint: Before and 48 hours after the intervention. Method of measurement: IL-6: Measured using a sandwich ELISA kit (Karmania Pars Gene, KPG HIL6,.

—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactLeyla Esmealy

Tabriz University of Medical Sciences

leylaesmealy@gmail.com+98 992 393 6560

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Jun 11, 2026