More bang for the buck: autonomy support increases muscular efficiency
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The purpose of this study was to examine whether conditions that provide performers with a sense of autonomy, by giving them choices, would increase movement efficiency. We evaluated neuromuscular activation as a function of choice, using surface electromyography (EMG), during isometric force production. Participants (N = 16) were asked to perform plantar flexions at each of three target torques (80%, 50%, 20% of maximum voluntary contractions) under both choice and control conditions. In the choice condition, they were able to choose the order of target torques, whereas the order was pre-determined in the control condition. Results demonstrated that while similar torques were produced under both conditions, EMG activity was lower in the choice relative to the control condition. Thus, providing performers with a choice led to reduced neuromuscular activity, or an increase in movement efficiency. This finding is in line with the notion that autonomy support readies the motor system for task execution by contributing to the coupling of goals and actions (Wulf and Lewthwaite, Psychon Bull Rev 23:1382–1414, 2016).
The authors thank Brach Poston and Dale Karas for assistance with research planning and data analysis, respectively.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights statement
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
- Field, A. (2009). Discovering statistics using SPSS (3rd ed.). London: Sage Publications Ltd.Google Scholar
- Foreman, K. B., Singer, M. L., Addison, O., Marcus, R. L., LaStayo, P. C., & Dibble, L. E. (2014). Effects of dopamine replacement therapy on lower extremity kinetics and kinematics during a rapid force production task in persons with Parkinson disease. Gait & Posture, 39, 638–640.CrossRefGoogle Scholar
- Geertsen, S. S., Kjaer, M., Pedersen, K. K., Petersen, T. H., Perez, M. A., & Nielsen, J. B. (2013). Central common drive to antagonistic ankle muscles in relation to short-term cocontraction training in nondancers and professional ballet dancers. Journal of Applied Physiology, 115, 1075–1081.CrossRefGoogle Scholar
- Montes, J., Wulf, G., & Navalta, J. W. (2018). Maximal aerobic capacity can be increased by enhancing performers’ expectancies. Journal of Sports Medicine and Physical Fitness, 58, 744–749.Google Scholar