Muscle weakness can be a primary concern for individuals with cerebral palsy. Strength training can improve the strength and function of muscles, resulting in positive changes in physical activity and functional ability for people with spastic diplegic cerebral palsy. The results of this study demonstrate that participation in a home-based strength-training program can be instrumental in improving muscle strength. In addition, strength-training benefits may lead to more permanent changes in daily activities. Incorporating a strength-training program at home requires simple, inexpensive equipment, parental supervision, and, possibly, a consultation with a physical therapist. The effects of this type of program can improve the daily life of children with spastic diplegic cerebral palsy and be part of a comprehensive management plan.