Evaluating isokinetic strength profile of elbow and shoulder muscles in elite wheelchair basketball players
摘要
This study aimed to describe the isokinetic strength profile of the shoulder and elbow muscles in elite wheelchair basketball players in the low-point (without trunk control) and high-point (with trunk control) classes, examining both inter-limb and intra-limb strength and identifying any asymmetries that may be present.
Methods14 elite wheelchair basketball players (each group of 7 players) participated in this study. A Biodex dynamometer was used to measure the internal and external rotator of the glenohumeral muscle and Elbow flexors and extensors strength at 60°/s and 180°/s velocities in a concentric/concentric mode.
ResultsThe low-point class players had stronger shoulder internal rotation (IR) muscles at 60◦/s velocity movement on the dominant side and stronger external rotation (ER) muscles at 180◦/s velocity. They also generated higher amounts of peak torque to body weight ratio in elbow extension (EE) and elbow flexion (EF) muscles than the high-point class players. This study found inter-limb asymmetries in the IR at both velocities in low-point class players and at 60°/s velocity in high-point class players. Additionally, high-point class players showed inter-limb asymmetry at 60°/s in ER muscles. No intra-limb asymmetries were observed in either group except for peak torque at 180°/s. Borderline inter-limb asymmetries in the EE strength at 60°/s velocity in low-point class players and 180°/s velocity in high-point class players were observed and moderate inter-limb asymmetries in EF muscles at both velocities in high-point class players. Intra-limb asymmetries were observed in both groups at both velocities.
ConclusionThis study may indicate that low-point class players rely more on their upper limbs than high-point class players due to lacking trunk muscle force. This information may be useful for focusing on selective muscle strengthening in physical preparation programs and preventing overuse injuries.