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Effects of various treadmill interventions on the development of joint kinematics in infants with Down syndrome
Jianhua Wu1, Julia Looper, Dale A Ulrich
1Department of Kinesiology and Health, Georgia State University, Atlanta, Georgia, USA.
Insights
Higher-intensity treadmill training significantly improved joint kinematics in infants with Down syndrome (DS), accelerating development within one year. This intervention shows promise for enhancing walking patterns in children with DS.
Area of Science:
- Pediatrics
- Biomechanical Engineering
- Developmental Neuroscience
Background:
- Infants with Down syndrome (DS) often exhibit delayed walking and uncoordinated gait patterns.
- Early motor development in DS is a critical area for therapeutic intervention.
Purpose of the Study:
- To compare the effects of two distinct treadmill interventions on the development of joint kinematic patterns in infants with Down syndrome (DS).
- To determine if higher-intensity, individualized (HI) training is more effective than lower-intensity, generalized (LG) training.
Main Methods:
- Thirty infants with DS were randomized into either an LG or HI treadmill training group.
- Kinematic data of hip, knee, and ankle joints were collected at a 1-year follow-up using motion capture.
- Key parameters analyzed included joint angles, timing of motion, and range of motion during gait.
Main Results:
- Both groups demonstrated significantly improved joint kinematics post-intervention.
- The HI group showed earlier peak ankle plantar flexion and a longer forward thigh swing duration.
- These findings suggest enhanced mechanical energy transfer and potentially reduced joint forces in the HI group.
Conclusions:
- Higher-intensity treadmill intervention accelerates the development of lower extremity joint kinematics in infants with DS.
- The HI intervention may lead to more efficient walking mechanics.
- Future research should explore the impact of these interventions on trunk and arm movements.
Background:
Infants with Down syndrome (DS) have delayed walking and produce less-coordinated walking patterns.
Objective:
The aim of this study was to investigate whether 2 treadmill interventions would have different influences on the development of joint kinematic patterns in infants with DS.
Design:
Thirty infants with DS were randomly assigned to a lower-intensity, generalized (LG) treadmill training group (LG group) or a higher-intensity, individualized (HI) treadmill training group (HI group) and trained until walking onset. Twenty-six participants (13 in each group) completed a 1-year gait follow-up assessment.
Methods:
During the gait follow-up assessment, reflective markers were placed bilaterally on the participants to measure the kinematic patterns of the hip, knee, and ankle joints. Both the timing and the magnitude of peak extension and flexion at the hip, knee, and ankle joints, as well as peak adduction and abduction at the hip joint, in the 2 groups were compared.
Results:
Both the LG group and the HI group showed significantly advanced development of joint kinematics at the gait follow-up. In the HI group, peak ankle plantar flexion occurred at or before toe-off, and the duration of the forward thigh swing after toe-off increased.
Limitations:
Joint kinematics in the lower extremities were evaluated in this study. It would be interesting to investigate the effect of treadmill interventions on kinematic patterns in the trunk and arm movement.
Conclusions:
The timing of peak ankle plantar flexion (before toe-off) in the HI group implies further benefits from the HI intervention; that is, the HI group may use mechanical energy transfer better at the end of stance and may show decreased hip muscle forces and moments during walking. It was concluded that the HI intervention can accelerate the development of joint kinematic patterns in infants with DS within 1 year after walking onset.
