The purpose of the study is to investigate the potential additional benefits of a relatively new physiotherapy method, fascial manipulation, in the rehabilitation of movement difficulties or other problems caused by CP (cerebral palsy). A physiotherapist specialized in fascial manipulation specifically treats the muscle fascia, which plays a central role in the problems associated with CP. Fascial manipulation feels just like a massage but does not hurt.

The purpose of the study is to determine how physiotherapeutic rehabilitation methods should be further developed in Finland and elsewhere. Fascial manipulation was originally developed in Italy and is used to treat many musculoskeletal problems. There have been few studies on the effectiveness of fascial manipulation in the context of CP problems. It is important to obtain more research evidence, which is why conducting this study is crucial.

Introduction Fascial manipulation (FM) is a manual therapy method developed by physiotherapist Luigi Stecco. It involves the treatment of deep fascia related to muscles or superficial fascia of subcutaneous tissue, which is made up of connective tissue. The goal of FM is to normalize the function of muscle-related fascia, allowing movement to return to normal and overstrained or painful structures to heal. Superficial fascial treatment is needed, for example, in the treatment of surgical scars and swelling The method has been used to treat various musculoskeletal disorders, with evidence supporting its effectiveness.

FM can be used in the rehabilitation of children with CP (cerebral palsy) to treat stiffness caused by the non-neural component of spasticity. Both neural and non-neural factors influence the abnormal movement patterns caused by spasticity in children with CP. Recent research suggests that non-neural factors are functionally more significant.

Spasticity caused by upper motor neuron damage leads to an increase in the extracellular matrix (ECM) of the muscle. The main component of the extracellular matrix is hyaluronan (HA), which facilitates internal muscle and intermuscular sliding and myofascial force transmission.

The mechanical properties of the muscle, such as stiffness and viscosity, often change with spasticity, as the increased concentration of HA associated with spasticity can increase the viscosity of the ECM and the collagen content in the muscle. This affects both active and passive movement and alters the force production and coordination between agonist and antagonist muscles. Increased resistance to active movement causes fatigue and pain. Increased ECM viscosity increases the stretch on the perimysium and the muscle spindle attached to it, sensitizing spindle activation. These non-neural peripheral factors are believed to cause muscle stiffness.

There have been few studies on the effectiveness of FM in the rehabilitation of children with CP. The limited studies and practical observations suggest that treatment targeting muscle-related fascia may be a beneficial addition to the rehabilitation of children with CP. High-quality studies on the effectiveness of FM in general musculoskeletal rehabilitation are scarce. A recent systematic review indicates that the level of evidence for FM is low to moderate. A systematic review on children with CP has recently been published.

In Finland, the rehabilitation of children with CP has largely relied on the NDT/Bobath framework, although its effectiveness has been strongly criticized in a recent meta-analysis. The need for further research is evident.

Therapists trained in NDT/Bobath use their experience, reflection, and knowledge gained from various continuing education courses in their work. The NDT-Bobath approach serves as the framework for clinical decision-making in therapy. It emphasizes the importance of the child's own activity in the development of agency.

Research Objectives The aim is that the therapy method used in the study will provide additional benefits to the rehabilitation of children with CP by enabling better movement patterns, more effective training, and more economical movement, thereby enhancing the child's/youth's functional capacity. The indication for fascia manipulation is to prevent and correct the typical functional limitations caused by CP and to enable better functional capacity.

Based on clinical observations, the acute effect of FM on the movement of children with CP is promising. The aim of this study is to investigate the acute and longer-term effects of FM using objective methods. The researchers will conduct an eight-week randomized and controlled rehabilitation intervention study with children with CP, comparing the effect of FM on walking ability and lower limb joint movements to therapy conducted according to current best rehabilitation practices. Through an interview study (with parents after the intervention), the researchers will investigate the potential added value of FM in the participant's involvement and empowerment, i.e., the ability to participate more diversely in various social activities and cope with hobbies, school, and other community activities. The assumption is that movement will be less strenuous. An interview with the child's own physiotherapist after the fascia manipulation intervention aims to identify any changes in functional capacity and therapy situations observed by the physiotherapist.

The Gross Motor Function Classification Scale (GMFCS) is used to determine the severity of the motor impairment in children with CP, describing gross motor function, i.e., movement. The classification uses levels 1-5 (Terveyskylä, Lastentalo, CP-vamma lapsella). The target group for this study are children at GMFCS level 2 (independent walking without assistive devices, often requiring orthoses, with some difficulty moving outside the home, e.g., stairs) and GMFCS level 3 (independent walking with assistive devices, such as a walker or rollator, with significant difficulty moving outside the home, often using a wheelchair outdoors).

Hypotheses:

I) Acute Effect: Compared to conventional neurological physiotherapy, fascia manipulation more effectively reduces spasticity and stiffness in the ankle and other lower limb joints and decreases co-contraction of the extensor-flexor muscles of the ankle during walking. Participants will include those in GMFCS levels 2 and 3. They rarely have differentiated movement in the ankle, so any changes will be visible in the movements of the knee and hip.

II) Longitudinal Effect: Compared to conventional neurological physiotherapy, fascia manipulation treatment better promotes the function of lower limb joints, which is reflected in an improved walking pattern (Gait Deviation Index) and positive changes in walking performance (6-minute walk test, primary outcome measure) and efficiency (oxygen consumption).

III) Improved mobility increases and eases patients' participation in various activities outside the home, such as attending school and engaging in hobbies, and transitions in these situations

Study Design and Patient Recruitment

The researchers will conduct an 8-week randomized and controlled rehabilitation intervention study, recruiting 20 children aged 7-14 years with a diagnosis of spastic CP (GMFCS levels 2-3) . The participants will be recruited from the HUS/ULS patient registry.

Sample Size and Randomization

Power calculations were performed based on the primary outcome measure (6-minute walk test). Based on clinical observations, the researchers estimate that FM increases walking speed by approximately 10% (0.05 m/s), which corresponds to an improvement of about 60 meters in the 6-minute walk test. With an effect size of 0.8, the required sample size would be 15 (power = 90% and α = 0.05), but the researchers are accounting for a 25% dropout rate and will recruit a total of 20 children with CP.

Participants will be randomized into two groups of 10: 1) fascia manipulation group (intervention group I) and 2) conventional physiotherapy group (intervention group II). Randomization will be done in blocks of four based on age, gender, GMFCS level, and baseline walking ability (6-minute test) and walking pattern (Gait Deviation Index). Once a group of four participants is formed based on registry data, they will be contacted, and both the child and the guardian will be asked about their willingness to participate in the study. If the child and guardian are willing to participate, the participants will be assigned to groups using a computer-based randomization tool, distributing 2-4 participants (considering GMFCS level, age, gender, and 6-minute walk test result) to intervention group I and intervention group II. If the child or guardian declines, a new participant will be sought using registry data (considering age, gender, and severity of CP), and their willingness to participate in the study will be asked. This process will continue until the intervention groups are formed.

The study is prepared to increase the sample size by an additional 10 (5+5) patients if necessary. The decision will be made after 20 (10+10) patients have been studied and the interventions have been carried out. If there is attrition or other issues that complicate statistical analysis, the sample size will be increased.

Intervention Group I

In Intervention Group I, children will undergo motion analysis measurements at the beginning of the study, receive one fascia manipulation treatment, and then have the measurements repeated after the treatment to assess the acute response to the therapy. The group will receive 8 FM intervention treatments (once a week) either at the child's home or at the physiotherapist's office. The therapy intervention will last about two months. After the treatments, the children will undergo motion analysis measurements again to assess the longitudinal effect of the therapy. It is noteworthy that during the fascia manipulation treatment, the regular weekly physiotherapy based on stretching will continue.

Intervention Group II

In Intervention Group II, children will undergo initial measurements, after which the physiotherapist will guide them through stretching exercises, and final measurements will be taken to assess the acute response to the stretching. During the two-month intervention, the children will receive the same therapy as before (traditional physiotherapy) and, in addition, a remotely conducted stretching program guided by the physiotherapist. Thus, the children will receive physiotherapy twice a week. This arrangement is to more reliably assess the potential added value of fascia manipulation. After the two-month intervention, the children in Intervention Group II will undergo the same motion analysis measurements as at the beginning, and then Intervention Group II will receive FM therapy eight times. The duration of the intervention is about two months.

A semi-structured interview will be conducted with the relative (parent) of the participant after the fascia manipulation intervention. A total of about 10 parents will be interviewed. The aim of the qualitative study is to document the impact of FM on the participant's daily life, schooling, social participation, and the effects on the lives of the participant's parents. The study will also interview the participant's physiotherapist (a total of about 10). The researcher will contact the interviewee to arrange a suitable time. The interview can be conducted either via Teams remote connection or face-to-face. The interview will last about 30 minutes. The interviews will be recorded if the interviewees give their consent. The recorded interviews will be transcribed anonymously, and personal data will not be linked to the anonymized data.

Inclusion Criteria:

• Age 7-14 years
• GMFCS level 2-3
• Good cooperation
• Family living in the Helsinki metropolitan area

Exclusion Criteria:

• The child has previously received fascia manipulation by a Stecco-trained therapist or other fascia treatment (if done within the last 6 months)
• Surgeries on the lower limbs (if done within the last 12 months)
• Electrical stimulation treatments (if done within the last 3 months)
• Botox treatments on the lower limbs (if done within the last 6 months)
• Reduced cognitive level
• Severe visual impairment (unable to perform the walking test)
• Other illnesses: psychological or other serious illness