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Lim, Moon, and Lee: Comparison of Cardiopulmonary Endurance among Positions in Middle School Soccer Players and Their Sports Injuries
Clinical Article

Korean J Sports Med 2013;31(2):63-68.

Published online: 10 January 2013

DOI: https://doi.org/10.5763/kjsm.2013.31.2.63

Comparison of Cardiopulmonary Endurance among Positions in Middle School Soccer Players and Their Sports Injuries

Kil-Byung Lim1, Jung-Wha Moon2, Ji Heoung Lee1,

1 Sports Medical Center, Department of Rehabilitation Medicine, Ilsanpaik Hospital, Inje University, Goyang

2 Sports Medical Center, Ilsanpaik Hospital, Goyang, Korea

Correspondence: Ji Heoung Lee Sports Medical Center, Department of Rehabilitation Medicine, Ilsanpaik Hospital, Inje University, 170 Juhwa-ro, Ilsanseo-gu, Goyang 411-706, Korea Tel: +82-31-910-7114, Fax: +82-31-910-7746 E-mail: lejihy8005@daum.net

Received 5 September 2013       Revised 8 November 2013       Accepted 16 November 2013

Copyright © 2013 The Korean Society of Sports Medicine

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study was to investigate the difference in cardiopulmonary endurance among positions in middle school soccer, and to identify the incidence of sports injuries in association with soccer matches and training. Ninety-six (32 forwards, 27 defenders, 29 midfielders, and eight goalkeeper [GK]) middle school soccer players (12.77±0.53 years) participated in this study. They had no medical problems. Their height, weight and body mass index (BMI) were measured, and they also went through tests for maximal oxygen consumption (VO2 max). We interviewed middle school soccer players about their soccer careers and their history of sports-related injuries. Physical fitness was compared among players in different playing positions. VO2 max was significantly higher in forward and defender groups than GK group. There was no significant relationship in cardiopulmonary endurance among outfield players. GK were taller and heavier than outfield players. BMI was significantly higher in GK group than midfielder group. They had played soccer for 39.08±20.28 months on average. During matches and training, forwards suffered 13 injuries (36.1%); defenders suffered 10 injuries (27.8%); midfielders suffered 12 injuries (33.3%); and only one GK came down with an injury (2.8%). The most common types of injuries were to knees (36.1%) and ankles (33.3%).

Keywords: Fitness, Injury, Position, Soccer, Sports

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Table 1.
Physical characteristics of subjects by player position
Characteristic Forward (n=32) Defender (n=27) Midfielder (n=29) Goalkeeper (n=8) Total (n=96)
Age (y) 12.90±0.58 12.81±0.39 12.58±0.56 12.74±0.46 12.77±0.53
Height (cm) 162.24±8.99† 159.39±9.25 155.83±8.37 172.97±4.38* 160.40±9.64
Weight (kg) 52.30±9.08† 51.70±8.77 46.40±6.99 63.96±6.00* 51.32±9.28
Body mass index 19.88±2.24 20.20±1.76 19.05±1.43 21.39±1.97† 19.85±1.95

Values are means±standard deviation.

* Significantly different from the value of other player groups (p<0.05);

† Significantly different from the value of midfielder group (p<0.05).

Table 2.
The result of the exercise tolerance test by player position
Characteristic Forward (n=32) Defender (n=27) Midfielder (n=29) Goalkeeper (n=8) Total (n=96)
Maximum oxygen consumption (mL/kg/min) 49.93±7.61* 50.27±5.80* 47.53±6.00 42.95±3.43 48.72±6.63

Values are means±standard deviation.

* Significantly different from the value of goalkeeper group (p<0.05).

Table 3.
Incidence of sports injury by player position
Characteristic Forward (n=32) Defender (n=27) Midfielder (n=29) Goalkeeper (n=8) Total (n=96)
Number of injuries (%) 13 (36.1) 10 (27.8) 12 (33.3) 1 (2.8) 36 (100)
Table 4.
Location of injuries and frequency by player position
Location of injuries No. of injuries (%)
Forward Defender Midfielder Goalkeeper
Neck 0 (0) 0 (0) 0 (0) 0 (0)
Upper extremity 0 (0) 0 (0) 2 (16.7) 1 (100)
Back 1 (7.7) 0 (0) 1 (8.3) 0 (0)
Hip 0 (0) 0 (0) 0 (0) 0 (0)
Thigh 1 (7.7) 0 (0) 0 (0) 0 (0)
Knee 4 (30.8) 5 (50) 4 (33.3) 0 (0)
Lower leg 0 (0) 0 (0) 0 (0) 0 (0)
Ankle 4 (30.8) 3 (30) 5 (41.7) 0 (0)
Foot 3 (23.0) 2 (20) 0 (0) 0 (0)
Total 13 (100) 10 (100) 12 (100) 1 (100)
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