Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis

BackgroundEarly exercise interventions targeting lower limb muscles are critical for enhancing motor development in children with cerebral palsy (CP). While both resistance training, which enhances muscular strength and endurance, and power training, which targets explosive force production and move...

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Main Authors: Bo Liu, Jizhi You, Yunxiang Fan, Yunping Xia, Xiang Zhang, Yang Zhang
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-06-01
Series:Frontiers in Pediatrics
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Online Access:https://www.frontiersin.org/articles/10.3389/fped.2025.1546156/full
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author Bo Liu
Jizhi You
Yunxiang Fan
Yunping Xia
Xiang Zhang
Yang Zhang
author_facet Bo Liu
Jizhi You
Yunxiang Fan
Yunping Xia
Xiang Zhang
Yang Zhang
author_sort Bo Liu
collection DOAJ
description BackgroundEarly exercise interventions targeting lower limb muscles are critical for enhancing motor development in children with cerebral palsy (CP). While both resistance training, which enhances muscular strength and endurance, and power training, which targets explosive force production and movement velocity, fall under the umbrella of strength training, this focused review synthesizes current evidence on muscle hypertrophy resulting from these two modalities in children with CP.MethodsThe Web of Science Core Collection, Scopus, and Embase were searched through March 2025. Eligible studies were randomized controlled trials assessing muscle fascicle length or proxy indicators of muscle fiber diameter following resistance or power training in children with CP. A random-effects meta-analysis was performed to calculate Cohen's d comparing strength training with regular physiotherapy.FindingsEight studies met the inclusion criteria and were systematically reviewed, with five included in the meta-analysis. These five studies reported outcomes from 80 participants in the strength training group and 73 participants in the traditional physiotherapy group. All participants were ambulatory children classified with low to mild levels on the Gross Motor Function Classification System. Resistance training significantly increased muscle fiber diameter (d = 0.82, 95% CI = 0.54–1.09), whereas power training did not (d = 0.35, 95% CI = −0.29 to 0.99). Neither training modality produced a significant increase in muscle fascicle length (resistance training: d = 0.19, 95% CI = −0.17 to 0.56; power training: d = 0.37, 95% CI = −0.27 to 1.01). Notably, one study comparing power and resistance training demonstrated a highly significant improvement in muscle fascicle length (d = 1.20, 95% CI = 0.13–2.27), which may be attributed to the high-velocity, high-load nature of concentric power training.InterpretationCurrent evidence favors resistance training to increase muscle fiber diameter in ambulatory children with CP. As individuals progress, maximal loads and repetitions should be progressively increased and complemented with explosive power training to further enhance muscle fascicle length and lower limb function. The optimal protocol for children with high levels of functional disability remains to be established.
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spelling doaj-art-d1df9adca3e7494382f4747e5c0d5acc2025-08-20T03:24:21ZengFrontiers Media S.A.Frontiers in Pediatrics2296-23602025-06-011310.3389/fped.2025.15461561546156Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysisBo Liu0Jizhi You1Yunxiang Fan2Yunping Xia3Xiang Zhang4Yang Zhang5College of Physical Education, Hunan Normal University, Changsha, ChinaCollege of Optical and Electronic Technology, China Jiliang University, Hangzhou, ChinaCollege of Physical Education, Hunan Normal University, Changsha, ChinaCollege of Physical Education, Hunan Normal University, Changsha, ChinaCollege of Physical Education, Hunan Normal University, Changsha, ChinaIndependent Researcher, Windermere, FL, United StatesBackgroundEarly exercise interventions targeting lower limb muscles are critical for enhancing motor development in children with cerebral palsy (CP). While both resistance training, which enhances muscular strength and endurance, and power training, which targets explosive force production and movement velocity, fall under the umbrella of strength training, this focused review synthesizes current evidence on muscle hypertrophy resulting from these two modalities in children with CP.MethodsThe Web of Science Core Collection, Scopus, and Embase were searched through March 2025. Eligible studies were randomized controlled trials assessing muscle fascicle length or proxy indicators of muscle fiber diameter following resistance or power training in children with CP. A random-effects meta-analysis was performed to calculate Cohen's d comparing strength training with regular physiotherapy.FindingsEight studies met the inclusion criteria and were systematically reviewed, with five included in the meta-analysis. These five studies reported outcomes from 80 participants in the strength training group and 73 participants in the traditional physiotherapy group. All participants were ambulatory children classified with low to mild levels on the Gross Motor Function Classification System. Resistance training significantly increased muscle fiber diameter (d = 0.82, 95% CI = 0.54–1.09), whereas power training did not (d = 0.35, 95% CI = −0.29 to 0.99). Neither training modality produced a significant increase in muscle fascicle length (resistance training: d = 0.19, 95% CI = −0.17 to 0.56; power training: d = 0.37, 95% CI = −0.27 to 1.01). Notably, one study comparing power and resistance training demonstrated a highly significant improvement in muscle fascicle length (d = 1.20, 95% CI = 0.13–2.27), which may be attributed to the high-velocity, high-load nature of concentric power training.InterpretationCurrent evidence favors resistance training to increase muscle fiber diameter in ambulatory children with CP. As individuals progress, maximal loads and repetitions should be progressively increased and complemented with explosive power training to further enhance muscle fascicle length and lower limb function. The optimal protocol for children with high levels of functional disability remains to be established.https://www.frontiersin.org/articles/10.3389/fped.2025.1546156/fullexercise modalitiesfascicle lengthmuscle hypertrophymuscle massmuscle volumeplyometric training
spellingShingle Bo Liu
Jizhi You
Yunxiang Fan
Yunping Xia
Xiang Zhang
Yang Zhang
Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
Frontiers in Pediatrics
exercise modalities
fascicle length
muscle hypertrophy
muscle mass
muscle volume
plyometric training
title Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
title_full Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
title_fullStr Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
title_full_unstemmed Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
title_short Resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy? A focused systematic review with meta-analysis
title_sort resistance or power training to enhance lower limb muscle morphology in ambulatory children with cerebral palsy a focused systematic review with meta analysis
topic exercise modalities
fascicle length
muscle hypertrophy
muscle mass
muscle volume
plyometric training
url https://www.frontiersin.org/articles/10.3389/fped.2025.1546156/full
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