Robot vs. therapist: which helps kids with CP walk better?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Diagnosis of CP (any type), GMFCS Levels II and III * Able to follow GMFM testing instructions, and to participate in a minimum of 30 minutes of active PT (as judged by the child's PT or physician if not followed by a PT) * Able to reliably signal pain, fear and discomfort using verbal or nonverbal signals * Passive range of motion (ROM) of hips and knees within minimum range requirement for LOK (hip and knee flexion contracture \< 10 degrees, and knee valgus \< 40 degrees). * Parent/child agrees to attend 16 study intervention sessions (given within two 10-week periods), a LOK fitting/acclimatization session or fPT acclimatization session and the three assessment sessions during the course of the study. * Parent agrees to contact of their primary PT (if not already involved by parent in the screening process) and their paediatrician or physiatrist to confirm eligibility. * Parent agrees that regular PT (and other gross motor mobility therapies such as conductive education and MEDEK) will be discontinued from the time of the baseline assessment through the 8 to 10 weeks of the active intervention or control group. Note that home programs such as stretching and strengthening and treadmill and exercise bike riding (no more than 10 minutes total per day) will be permitted in all groups. Exclusion Criteria: * Botulinum Toxin injection within the past 4 months or planned within the next 6 months * Fixed knee contracture \> 10 degrees, knee valgus \>40 degrees such that orthosis will not be adaptable to lower limbs. * Hip instability/subluxation as demonstrated by a migration percentage \> 45% * Orthopaedic surgery (soft tissue releases) within the last 9 months, or lower limb bony surgery within the last 18 months * Severe spasticity may be a contraindication as determined in Lokomat trial session using L-FORCE assessment. * Any weightbearing restrictions. * Seizure disorder unless fully controlled by medication and no evidence of seizure in the last 12 months and physician provides singed approval to enter the study * Open skin lesions or vascular disorder of lower extremities * Not able to co-operate or be positioned adequately within the LOK as shown during the fitting/acclimatisation session. -