Abstract
The purpose of this study was to clarify the differences in reaction time, stepping frequency and stepping endurance estimated by chronological age compared to skeletal age. The participants were 76 well-trained soccer players aged from 9.7 to 14.8 years old. Height and weight were measured before training. Their skeletal ages were evaluated by RUS score of TW II method. RUS score was calculated for skeletal age by Murata's method. Reaction time, stepping frequency and endurance were measured by Talent-Diagnose-System (Werthner Sports Consulting, KEG, Co, Ltd.). For chronological age, height increased linearly from 9 to 14. Height estimated by skeletal age increased slowly from 8 to 10, then increased drastically between the ages of 10 to 15. Significant change was shown between the ages of 12 and 13 (p<0.01). Complex reaction time (CRT) estimated from chronological age developed linearly from 9 to 14 years of age. However for skeletal age, CRT at 10 was slower than at 8 and 9 years of age. Then it developed significantly between the ages of 10 and 11 (p<0.05). On the other hand, stepping frequency and endurance did not show as remarkable a change with increasing age as reaction time. The results of this present study indicate that in adolescent soccer players, there are some differences between skeletal age and chronological age in cross-sectional change of reaction time. Moreover, skeletal age did not affect the development of stepping frequency and endurance.
| Original language | English |
|---|---|
| Pages (from-to) | 299-306 |
| Number of pages | 8 |
| Journal | Japanese Journal of Physical Fitness and Sports Medicine |
| Volume | 51 |
| Issue number | 3 |
| Publication status | Published - 2002 Jun |
| Externally published | Yes |
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Keywords
- Adolescent soccer player
- Chronological age
- Reaction time
- Skeletal age
- Stepping
ASJC Scopus subject areas
- Physiology
- Orthopedics and Sports Medicine
- Public Health, Environmental and Occupational Health
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Cross-sectional change in reaction time and stepping ability estimated from skeletal and chronological age in adolescent soccer players. / Hirose, Norikazu; Hirano, Atsushi; Fukubayashi, Toru.
In: Japanese Journal of Physical Fitness and Sports Medicine, Vol. 51, No. 3, 06.2002, p. 299-306.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cross-sectional change in reaction time and stepping ability estimated from skeletal and chronological age in adolescent soccer players
AU - Hirose, Norikazu
AU - Hirano, Atsushi
AU - Fukubayashi, Toru
PY - 2002/6
Y1 - 2002/6
N2 - The purpose of this study was to clarify the differences in reaction time, stepping frequency and stepping endurance estimated by chronological age compared to skeletal age. The participants were 76 well-trained soccer players aged from 9.7 to 14.8 years old. Height and weight were measured before training. Their skeletal ages were evaluated by RUS score of TW II method. RUS score was calculated for skeletal age by Murata's method. Reaction time, stepping frequency and endurance were measured by Talent-Diagnose-System (Werthner Sports Consulting, KEG, Co, Ltd.). For chronological age, height increased linearly from 9 to 14. Height estimated by skeletal age increased slowly from 8 to 10, then increased drastically between the ages of 10 to 15. Significant change was shown between the ages of 12 and 13 (p<0.01). Complex reaction time (CRT) estimated from chronological age developed linearly from 9 to 14 years of age. However for skeletal age, CRT at 10 was slower than at 8 and 9 years of age. Then it developed significantly between the ages of 10 and 11 (p<0.05). On the other hand, stepping frequency and endurance did not show as remarkable a change with increasing age as reaction time. The results of this present study indicate that in adolescent soccer players, there are some differences between skeletal age and chronological age in cross-sectional change of reaction time. Moreover, skeletal age did not affect the development of stepping frequency and endurance.
AB - The purpose of this study was to clarify the differences in reaction time, stepping frequency and stepping endurance estimated by chronological age compared to skeletal age. The participants were 76 well-trained soccer players aged from 9.7 to 14.8 years old. Height and weight were measured before training. Their skeletal ages were evaluated by RUS score of TW II method. RUS score was calculated for skeletal age by Murata's method. Reaction time, stepping frequency and endurance were measured by Talent-Diagnose-System (Werthner Sports Consulting, KEG, Co, Ltd.). For chronological age, height increased linearly from 9 to 14. Height estimated by skeletal age increased slowly from 8 to 10, then increased drastically between the ages of 10 to 15. Significant change was shown between the ages of 12 and 13 (p<0.01). Complex reaction time (CRT) estimated from chronological age developed linearly from 9 to 14 years of age. However for skeletal age, CRT at 10 was slower than at 8 and 9 years of age. Then it developed significantly between the ages of 10 and 11 (p<0.05). On the other hand, stepping frequency and endurance did not show as remarkable a change with increasing age as reaction time. The results of this present study indicate that in adolescent soccer players, there are some differences between skeletal age and chronological age in cross-sectional change of reaction time. Moreover, skeletal age did not affect the development of stepping frequency and endurance.
KW - Adolescent soccer player
KW - Chronological age
KW - Reaction time
KW - Skeletal age
KW - Stepping
UR - http://www.scopus.com/inward/record.url?scp=0036618971&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036618971&partnerID=8YFLogxK
M3 - Article
VL - 51
SP - 299
EP - 306
JO - Japanese Journal of Physical Fitness and Sports Medicine
JF - Japanese Journal of Physical Fitness and Sports Medicine
SN - 0039-906X
IS - 3
ER -