What this trial measures

• 1 Repetition Maximum (1-RM) TestingBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Particpants will complete strength testing of hip/knee extensors and plantarflexor muscle groups using a leg press, using 1 Rep max testing protocols, as outlined in Pontiff and moreau, 2022. (PMID 35960137)

• 10 meter walk testBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Walking speed test of 10 meter distance, completed in both conditions of self selected speed and fast gait speed

• Keiser Leg PressBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Assessment of lower extremity power

• Timed up and Down StairsBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Functional measure of how quickly child can climb up and down 1 flight of stairs

• 30 second sit to standsBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  This is a clinical assessment of lower extremity strength, in which investigators count the number of repetitions of sit to stands completed in 30 seconds.

• 30 second half kneel to standBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  This is a clinical assessment of lower extremity strength, in which investigators count the number of repetitions of half kneel to stand complete correctly in a 30 second time period.

• Lateral Step UpsBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  This is a clinical assessment of lower extremity strength, in which investigators count the number of repetitions of lateral step ups completed in 30 seconds on a standard size 6 inch step.

• Gross Motor Function Measure-88 (GMFM-88)Before PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  This is a criterion referenced measure of gross motor function and is valid and reliable for children with cerebral palsy. It evaluates motor skills that are typical for normal development. Dimensions D and E will be utilized, as these 2 sections assess the overall gross motor function in direct relation to standing, walking, running, and jumping.

• Canadian Occupational Performance MeasureBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Evidence-based outcome measure designed to capture a client's self-perception of performance in goals they determine before intervention. The measurement focuses on self-care, leisure activities, and productivity. The participant rates their performance and their satisfaction with their performance on a scale from 1-10, with 1 indicating poor performance and low satisfaction, while 10 indicates very good performance and high satisfaction.

• Standing balance with eyes closed standing on firm surfaceBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Participants will stand on a force plate with eyes closed. Postural control information is obtained from the investigators and the force plate tracks the center of pressure of the participant.

• Standing balance with eyes closed standing on firm surfaceBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Joint kinematics (movement strategies) obtained while eyes closed standing on firm surface

• Walking- single taskBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Walking speed is obtained form spatial sensor

• Walking- single taskBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Stride length obtained from spatial sensor

• Walking- cognitive dual taskBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  speed of walking will be obtained from spatial sensor while completing appropriate/salient cognitive dual task

• Walking- cognitive dual taskBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  stride length will be obtained from spatial sensor while completing appropriate/salient cognitive dual task

• 5 Times sit to stand testBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  time to complete and knee joint kinematics obtained from spatial sensor

• Step downBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  knee joint kinematics obtained from spatial sensor while the participant steps down from a 6 inch curb step

• JumpingBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Production of power will be obtained from force plate and spatial sensor

• JumpingBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  Assessment of knee joint kinematics during jumping will be obtained from force plate and spatial sensor

• Reaction timeBefore PT intervention begins (week 1), midpoint of program (Week 7), and last week of program (week 15).

  measurement of upper extremity reaching reaction