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Effects and Dose-Response Relationships of Motor Imagery Practice on Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis.
Sports Med. 2018 May; 48(5):1165-1187.SM

Abstract

BACKGROUND

Motor imagery (MI), a mental simulation of a movement without overt muscle contraction, has been largely used to improve general motor tasks. However, the effects of MI practice on maximal voluntary strength (MVS) remain equivocal.

OBJECTIVES

The aims of this meta-analysis were to (1) estimate whether MI practice intervention can meaningfully improve MVS in healthy adults; (2) compare the effects of MI practice on MVS with its combination with physical practice (MI-C), and with physical practice (PP) training alone; and (3) investigate the dose-response relationships of MI practice.

DATA SOURCES AND STUDY ELIGIBILITY

Seven electronic databases were searched up to April 2017. Initially 717 studies were identified; however, after evaluation of the study characteristics, data from 13 articles involving 370 participants were extracted. The meta-analysis was completed on MVS as the primary parameter. In addition, parameters associated with training volume, training intensity, and time spent training were used to investigate dose-response relationships.

RESULTS

MI practice moderately improved MVS. When compared to conventional PP, effects were of small benefit in favour of PP. MI-C when compared to PP showed unclear effects. MI practice produced moderate effects in both upper and lower extremities on MVS. The cortical representation area of the involved muscles did not modify the effects. Meta-regression analysis revealed that (a) a training period of 4 weeks, (b) a frequency of three times per week, (c) two to three sets per single session, (d) 25 repetitions per single set, and (e) single session duration of 15 min were associated with enhanced improvements in muscle strength following MI practice. Similar dose-response relationships were observed following MI and PP.

CONCLUSIONS

The present meta-analysis demonstrates that compared to a no-exercise control group of healthy adults, MI practice increases MVS, but less than PP. These findings suggest that MI practice could be considered as a substitute or additional training tool to preserve muscle function when athletes are not exposed to maximal training intensities.

Authors+Show Affiliations

Science and Research Centre, Institute for Kinesiology Research, University of Primorska, Garibaldijeva 1, 6000, Koper, Slovenia. armin.paravlic@zrs-kp.si.Research Laboratory "Sports Performance Optimization", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia.School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK.Science and Research Centre, Institute for Kinesiology Research, University of Primorska, Garibaldijeva 1, 6000, Koper, Slovenia. Department of Health Sciences, Alma Mater Europaea - ECM, Maribor, Slovenia.Science and Research Centre, Institute for Kinesiology Research, University of Primorska, Garibaldijeva 1, 6000, Koper, Slovenia. Faculty of Sport and Physical Education, University of Niš, Čarnojevićeva 10a, Niš, 18000, Serbia.Science and Research Centre, Institute for Kinesiology Research, University of Primorska, Garibaldijeva 1, 6000, Koper, Slovenia.

Pub Type(s)

Journal Article
Meta-Analysis
Review
Systematic Review

Language

eng

PubMed ID

29541965

Citation

Paravlic, Armin H., et al. "Effects and Dose-Response Relationships of Motor Imagery Practice On Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis." Sports Medicine (Auckland, N.Z.), vol. 48, no. 5, 2018, pp. 1165-1187.
Paravlic AH, Slimani M, Tod D, et al. Effects and Dose-Response Relationships of Motor Imagery Practice on Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis. Sports Med. 2018;48(5):1165-1187.
Paravlic, A. H., Slimani, M., Tod, D., Marusic, U., Milanovic, Z., & Pisot, R. (2018). Effects and Dose-Response Relationships of Motor Imagery Practice on Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis. Sports Medicine (Auckland, N.Z.), 48(5), 1165-1187. https://doi.org/10.1007/s40279-018-0874-8
Paravlic AH, et al. Effects and Dose-Response Relationships of Motor Imagery Practice On Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis. Sports Med. 2018;48(5):1165-1187. PubMed PMID: 29541965.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects and Dose-Response Relationships of Motor Imagery Practice on Strength Development in Healthy Adult Populations: a Systematic Review and Meta-analysis. AU - Paravlic,Armin H, AU - Slimani,Maamer, AU - Tod,David, AU - Marusic,Uros, AU - Milanovic,Zoran, AU - Pisot,Rado, PY - 2018/3/16/pubmed PY - 2018/11/27/medline PY - 2018/3/16/entrez SP - 1165 EP - 1187 JF - Sports medicine (Auckland, N.Z.) JO - Sports Med VL - 48 IS - 5 N2 - BACKGROUND: Motor imagery (MI), a mental simulation of a movement without overt muscle contraction, has been largely used to improve general motor tasks. However, the effects of MI practice on maximal voluntary strength (MVS) remain equivocal. OBJECTIVES: The aims of this meta-analysis were to (1) estimate whether MI practice intervention can meaningfully improve MVS in healthy adults; (2) compare the effects of MI practice on MVS with its combination with physical practice (MI-C), and with physical practice (PP) training alone; and (3) investigate the dose-response relationships of MI practice. DATA SOURCES AND STUDY ELIGIBILITY: Seven electronic databases were searched up to April 2017. Initially 717 studies were identified; however, after evaluation of the study characteristics, data from 13 articles involving 370 participants were extracted. The meta-analysis was completed on MVS as the primary parameter. In addition, parameters associated with training volume, training intensity, and time spent training were used to investigate dose-response relationships. RESULTS: MI practice moderately improved MVS. When compared to conventional PP, effects were of small benefit in favour of PP. MI-C when compared to PP showed unclear effects. MI practice produced moderate effects in both upper and lower extremities on MVS. The cortical representation area of the involved muscles did not modify the effects. Meta-regression analysis revealed that (a) a training period of 4 weeks, (b) a frequency of three times per week, (c) two to three sets per single session, (d) 25 repetitions per single set, and (e) single session duration of 15 min were associated with enhanced improvements in muscle strength following MI practice. Similar dose-response relationships were observed following MI and PP. CONCLUSIONS: The present meta-analysis demonstrates that compared to a no-exercise control group of healthy adults, MI practice increases MVS, but less than PP. These findings suggest that MI practice could be considered as a substitute or additional training tool to preserve muscle function when athletes are not exposed to maximal training intensities. SN - 1179-2035 UR - https://www.unboundmedicine.com/medline/citation/29541965/Effects_and_Dose_Response_Relationships_of_Motor_Imagery_Practice_on_Strength_Development_in_Healthy_Adult_Populations:_a_Systematic_Review_and_Meta_analysis_ L2 - https://dx.doi.org/10.1007/s40279-018-0874-8 DB - PRIME DP - Unbound Medicine ER -