Can adults with cerebral palsy perform and benefit from ballistic strength training to improve walking outcomes? A mixed methods feasibility study

Physical activity and exercise interventions in adults with cerebral palsy: a systematic review of quantitative and qualitative studies

PURPOSE

Participating in physical activity may benefit health-related outcomes for adults with cerebral palsy (CP). The aim of this review is to provide a synthesis of the evidence from both qualitative and quantitative studies on the impact of physical activity and exercise interventions in adults with CP.

METHODS

Literature searches were conducted from inception to November 2023 in nine electronic databases. A meta-analysis was carried out to evaluate the efficacy of the interventions on walking speed related outcomes and muscle strength.

RESULTS

Twenty-two studies met the inclusion criteria. The interventions of the nine studies included in the meta-analysis did not improve walking speed over a distance of 10 m (SMD = -0.03, 95% CI: -0.34-0.40, p = 0.88, I2 = 0%) or endurance (distance covered in 2 or 6 min) (SMD = 0.25, 95% CI: -0.10-0.59, p = 0.16, I2 = 0%), but there was an improvement in lower limb muscle strength in favour of the experimental groups (SMD = 0.59, 95% CI: 0.19-0.99, p = 0.004, I2 = 20%). Only a few studies reported on psychosocial outcomes, quality of life, or intervention sustainability.

DISCUSSION AND CONCLUSIONS

Further research is needed to explore the impact on psychosocial outcomes and quality of life in adults with CP and the sustainability of physical activity participation.

Ballistic strength training in adults with cerebral palsy may increase rate of force development in plantar flexors, but transition to walking remains unclear: a case series

Background

Persons with cerebral palsy (CP) walk with reduced ankle plantar flexor power compared to typically developing. In this study, we investigated whether a ballistic strength-training programme targeting ankle plantar flexors could improve muscle strength, muscle architecture and walking function in adults with CP.

Methods

Eight adults (mildly affected CP) underwent eight weeks of ballistic strength training, with two sessions per week. Before and after the intervention preferred walking speed, ankle plantar flexion rate of force development (RFD), maximal voluntary contraction (MVC), muscle thickness, pennation angle and fascicle length were measured. Data are presented for individuals, as well as for groups. Group changes were analysed using the Wilcoxon signed-rank test.

Results

Data were analysed for eight participants (five women, mean age 37.9 years; six GMFCS I and two GMFCS II). Two participants increased their walking speed, but there were no significant group changes. In terms of muscle strength, there were significant group changes for RFD at 100 ms and MVC. In the case of muscle architecture, there were no group changes.

Conclusion

In this study, we found that eight weeks of ballistic strength training improved ankle plantar flexor muscle strength but walking function and muscle architecture were unchanged. Larger studies will be needed to obtain conclusive evidence of the efficacy of this training method.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13102-022-00487-1.