Advanced International Journal for Research

E-ISSN: 3048-7641   •   Impact Factor: 9.11

A Widely Indexed Open Access Peer Reviewed Multidisciplinary Bi-monthly Scholarly International Journal

Call for Paper Volume 7, Issue 3 (May-June 2026) Submit your research before last 3 days of June to publish your research paper in the issue of May-June.
Submit Research Paper Join as a Reviewer

Plagiarism is checked by the leading plagiarism checker TurnItIn

Call for Paper

Volume 7 Issue 3
May-June 2026

Submit your research paper

Indexing Partners
Academia Advanced Sciences Index Bielefeld Academic Search Engine CiteSeer DRJI Google Scholar Independent Search Engine & Directory Network ISI (International Scientific Indexing) Issuu Mendeley Research Networks
RefSeek ResearcherId - Thomson Reuters ResearchGate Scirus Scribd Semantic Scholar Wiki for Call for Papers WorldCat Zenodo

Age-Related Differences in Physical Fitness Components of Youth Football Players

Author(s) Dr. Ashok Kumar
Country India
Abstract This study aimed to investigate differences in selected physical fitness components between U13 and U15 youth football players using standardized field-based tests. A cross-sectional comparative design was employed with 36 male youth football players (U13: n = 18, mean age 12.7 ± 0.4 years; U15: n = 18, mean age 14.6 ± 0.5 years) from organized training programs at university ground, Bengaluru. All participants had at least two years of systematic football training and were free from recent injuries. Physical fitness was assessed using the 30 m sprint test (linear speed), the standing long jump (lower-body explosive power), the Illinois agility test (change-of-direction ability), and the Yo-Yo Intermittent Recovery Test Level 1 (aerobic endurance). Data were analyzed using independent-samples t-tests and Cohen’s d effect sizes (p < 0.05). Statistically significant differences were found between groups in all measured variables (p < 0.001). U15 players outperformed U13 players with faster 30 m sprint times (4.41 ± 0.27 s vs. 4.82 ± 0.31 s, t = 4.12, d = 1.38), greater standing long jump distances (1.95 ± 0.18 m vs. 1.72 ± 0.15 m, t = −3.89, d = 1.40), quicker Illinois agility test times (16.93 ± 0.69 s vs. 18.21 ± 0.74 s, t = 5.06, d = 1.45), and higher Yo-Yo IR1 distances (1420 ± 260 m vs. 910 ± 210 m, t = −6.01, d = 2.15). All effect sizes were larger.
Keywords Youth Football, Age-Related Differences, Sprint Performance, Agility, Aerobic Endurance, Physical Fitness.
Field Sociology > Sports
Published In Volume 7, Issue 3, May-June 2026
Published On 2026-06-08
View / Download PDF File

Share this



E-ISSN 3048-7641
CrossRef

CrossRef DOI is assigned to each research paper published in our journal.

AIJFR DOI prefix is
10.63363/aijfr

Downloads
Research Paper Format Copyright Permission Form and Undertaking Form Cover Page Vol 7 Isu 2Cover Page Vol 7 Isu 1Cover Page Vol 6 Isu 6

All research papers published on this website are licensed under Creative Commons Attribution-ShareAlike 4.0 International License, and all rights belong to their respective authors/researchers.

CC-BY-SA Open Access

About AIJFR
Fees & Payment
Current Issue
Publication Archive 		Submit Research Paper
Track Submission Status
Publication Guidelines
Publication Ethics
Peer Review & Plagiarism 		Join as a Reviewer
Editors & Reviewers
Reviewer Referral Program
Get Reviewer Membership Certi. 		Website/Journal Policies
Usage Policy
Content Policies
Privacy Policy
Contact Us +91-9898-79-39-59 editor@aijfr.com