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Elbow Flexor Strength, Muscle Size, and Moment Arms in Prepubertal Boys and Girls
- Source :
- Pediatric Exercise Science. 18:457-469
- Publication Year :
- 2006
- Publisher :
- Human Kinetics, 2006.
-
Abstract
- The aim of this study was to examine elbow flexion torque, muscle cross-sectional area (CSA), and leverage in boys and girls. Thirty-eight prepubertal children (9.6 ± 0.3 years) volunteered to participate. All performed isometric flexion actions at 10°, 50°, and 90° of elbow flexion. Magnetic resonance imaging was used to assess elbow flexor (EF) muscle CSA and brachialis moment arm lengths. No significant gender differences were observed for any of the variables studied. EF CSA was directly proportional to isometric torque at 50° and 90°. CSA explained between 47% and 57% of torque variance. Moment arm estimates explained 19% of the variance in isometric torque at 90°. These baseline data contribute to our understanding of factors influencing strength variation during childhood.
- Subjects :
- Orthodontics
medicine.medical_specialty
Elbow flexor
business.industry
Isometric torque
Physical Therapy, Sports Therapy and Rehabilitation
Isometric exercise
Baseline data
musculoskeletal system
body regions
Moment (mathematics)
Pediatrics, Perinatology and Child Health
Physical therapy
medicine
Muscle strength
Orthopedics and Sports Medicine
Brachialis
business
Elbow flexion
Subjects
Details
- ISSN :
- 15432920 and 08998493
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- Pediatric Exercise Science
- Accession number :
- edsair.doi...........81d4e626d690d5d0740ee12a24124f87
- Full Text :
- https://doi.org/10.1123/pes.18.4.457