High-intensity interval training improves the reactive strength index and motor ability of youth football players

The effects of high-intensity training on jumping and movement skills in youth football players

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN45188963

Enrollment

Registered

2025-07-16

Start date

2025-02-01

Completion date

Unknown

Last updated

2026-02-16

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

Conditions

Neuromuscular performance, reactive strength, and motor abilities related to physical fitness and athletic development in adolescent football players. Other

Interventions

The experimental group underwent a 4-week high-intensity interval training (HIIT) program in addition to their regular football training. Training sessions were conducted three times per week (Monday,

Eligibility

Sex/Gender

Male

Age

11 Years to 13 Years

Inclusion criteria

Inclusion criteria: 1. Aged 13 years or younger 2. Actively playing football (registered at a football academy) 3. Participated in regular football training within the past 6 months 4. Physically healthy (no chronic illness or injury) 5. Willing to voluntarily participate in the study 6. Signed informed assent form 7. Written parental/legal guardian consent obtained

Exclusion criteria

Exclusion criteria: 1. Presence of any chronic disease 2. Orthopedic disorders or musculoskeletal injuries 3. Recent or ongoing infections 4. Requirement for continuous medication use 5. Lack of informed assent or parental/legal guardian consent 6. Voluntary withdrawal from the study at any stage 7. Failure to regularly attend training sessions or test procedures

Design outcomes

Primary

Measure	Time frame
Reactive Strength Index (RSI), measured using the Smart Jump system, assessed pre- and post-intervention	—

Secondary

Measure	Time frame
Assessed pre- and post-intervention: 1. Sprint Performance: 10 m, 20 m, and 30 m sprint times measured using electronic timing gates to assess linear speed. 2. Back Strength: Assessed using a Takei dynamometer to evaluate maximal isometric strength. 3. Illinois Agility Test: Used to assess agility and change of direction ability on a standardized slalom course. 4. Countermovement Jump (CMJ): Vertical jump height measured using the Smart Jump system to assess explosive leg power. 5. Anthropometric Measurements: Body height and body weight measured to monitor physical characteristics of participants.	—

Measure

Time frame

Assessed pre- and post-intervention: 1. Sprint Performance: 10 m, 20 m, and 30 m sprint times measured using electronic timing gates to assess linear speed. 2. Back Strength: Assessed using a Takei dynamometer to evaluate maximal isometric strength. 3. Illinois Agility Test: Used to assess agility and change of direction ability on a standardized slalom course. 4. Countermovement Jump (CMJ): Vertical jump height measured using the Smart Jump system to assess explosive leg power. 5. Anthropometric Measurements: Body height and body weight measured to monitor physical characteristics of participants.

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Countries

Türkiye

Contacts

Public ContactSerkan Kizilca

skizilca@beu.edu.tr+90 505 554 57 02

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 19, 2026