How changing the focus of attention affects performance, kinematics, and electromyography in dart throwing

• Published in: Human movement science Vol. 29; no. 4; pp. 542 - 555
• Main Authors: Lohse, Keith R., Sherwood, David E., Healy, Alice F.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2010; Elsevier
• Subjects: Analysis; Attention - physiology; Biological and medical sciences; Biomechanical Phenomena; Distance Perception - physiology; Efficiency - physiology; Elbow Joint - innervation; Electromyography; Focus of attention; Fourier Analysis; Fundamental and applied biological sciences. Psychology; Human performance; Humans; Motor control; Motor Skills - physiology; Muscle, Skeletal - innervation; Orientation - physiology; Psychomotor Performance - physiology; Shoulder Joint - innervation; Signal Processing, Computer-Assisted; Task Performance and Analysis; Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports; 2330; 2346; Focus of attention; Motor control; Human performance; 2343; Human; Sport; Attention; Kinematics; Electrophysiology; Electromyography; Throwing; Performance
• ISSN: 0167-9457; 1872-7646
• DOI: 10.1016/j.humov.2010.05.001

Research has found an advantage for an external focus of attention in motor control and learning; instructing subjects to focus on the effects of their actions, rather than on body movements, can improve performance during training and retention testing. Previous research has mostly concentrated on movement outcomes, not on the quality of the movement itself. Thus, this study combined surface electromyography (EMG) with motion analysis and outcome measures in a dart throwing task, making this the first study that includes a comprehensive analysis of changes in motor performance as a function of attentional focus. An external focus of attention led to better performance (less absolute error), decreased preparation time between throws, and reduced EMG activity in the triceps brachii. There was also some evidence of increased variability for kinematic measures of the shoulder joint under an external focus relative to an internal focus. These results suggest improved movement economy with an external focus of attention.