How rotation of the palm on the ground can change the neuromuscular function of shoulder complex: musculoskeletal modeling VS experimental
Oral Presentation
Paper ID : 2160-SSRC
Authors
1ندارم
2ندارد.
Abstract
Introduction:
The push-up is a widely used exercise for upper limb strengthening that can be performed with many variants. The challenge for coaches and athletes is the relationship between palm rotation on the ground and shoulder muscle forces and activations.
Aim:
This study aimed to compare muscle forces and activations among three angles of palm rotation on the ground during the push-up exercises: external (180°), internal (0°), and medium (90°).
Methods:
Fifteen fitness athletes participated (weight: 68.35±7.18 kg, height: 175±3.40 cm, age: 24.50±7.5 years, and experience: 12±3 years).
Participants performed a set of 5 repetitions for each push-up variant.
The WU shoulder model in OpenSim was used as a base model. The model consists of 5 segments and 10 degrees of freedom. The base model was scaled by markers data in the static position by the scaling tool in OpenSim. The kinematics data were recorded via Ten Vicon motion captures (Vicon MX, Oxford, UK, 200 Hz). The activities were collected for selective muscles: anterior deltoid, middle deltoid, posterior deltoid, infraspinatus, upper pectoralis major, middle pectoralis major, lower pectoralis major, latissimus dorsi, triceps lateral, triceps medial, biceps brachii, upper trapezius, and lower trapezius muscles. The (IK) , (ID) , and (SO) tools of OpenSim were used to calculate joint kinematics, joint moments, and muscle forces, respectively. Matlab was used for data normalization and statistical analysis.
Result:
Significant differences were observed among three rotations of palm positions (p<0.05). The major differences were observed at the beginning and terminal phases of the push-up movements.
Discussion and Conclusion:
Execration of the push-up may place the scapula in a position of impingement. According to the results, the utilization of push-up exercises without biomechanical adjustment in rehabilitation should be considered cautiously. Results indicate how athletes and coaches can improve their performances by understanding muscle activations and Joint loads. In addition, trainers and physical therapists should be aware of AC and GH joint kinematics and kinetics when prescribing and monitoring exercise progression. Our results will provide further knowledge for trainers and physical therapists in prescribing rehabilitation exercises for the upper body, especially closed-chain exercises for hand locations.
The push-up is a widely used exercise for upper limb strengthening that can be performed with many variants. The challenge for coaches and athletes is the relationship between palm rotation on the ground and shoulder muscle forces and activations.
Aim:
This study aimed to compare muscle forces and activations among three angles of palm rotation on the ground during the push-up exercises: external (180°), internal (0°), and medium (90°).
Methods:
Fifteen fitness athletes participated (weight: 68.35±7.18 kg, height: 175±3.40 cm, age: 24.50±7.5 years, and experience: 12±3 years).
Participants performed a set of 5 repetitions for each push-up variant.
The WU shoulder model in OpenSim was used as a base model. The model consists of 5 segments and 10 degrees of freedom. The base model was scaled by markers data in the static position by the scaling tool in OpenSim. The kinematics data were recorded via Ten Vicon motion captures (Vicon MX, Oxford, UK, 200 Hz). The activities were collected for selective muscles: anterior deltoid, middle deltoid, posterior deltoid, infraspinatus, upper pectoralis major, middle pectoralis major, lower pectoralis major, latissimus dorsi, triceps lateral, triceps medial, biceps brachii, upper trapezius, and lower trapezius muscles. The (IK) , (ID) , and (SO) tools of OpenSim were used to calculate joint kinematics, joint moments, and muscle forces, respectively. Matlab was used for data normalization and statistical analysis.
Result:
Significant differences were observed among three rotations of palm positions (p<0.05). The major differences were observed at the beginning and terminal phases of the push-up movements.
Discussion and Conclusion:
Execration of the push-up may place the scapula in a position of impingement. According to the results, the utilization of push-up exercises without biomechanical adjustment in rehabilitation should be considered cautiously. Results indicate how athletes and coaches can improve their performances by understanding muscle activations and Joint loads. In addition, trainers and physical therapists should be aware of AC and GH joint kinematics and kinetics when prescribing and monitoring exercise progression. Our results will provide further knowledge for trainers and physical therapists in prescribing rehabilitation exercises for the upper body, especially closed-chain exercises for hand locations.
Keywords