Lexi Cook tells PEOPLE about raising her son, Bo, who was diagnosed with cerebral palsy at 4 months old, and how some doctors have given her hope.

For Hulsey and Cooper, this race day was special because they were gifted a customized running chair for Moses, who has cerebral palsy, to use. "It's very generous.

For Hulsey and Cooper, this race day was special because they were gifted a customized running chair for Moses, who has cerebral palsy, to use. “It’s very generous.

For Hulsey and Cooper, this race day was special because they were gifted a customized running chair for Moses, who has cerebral palsy, to use. "It's very generous. This is a fantastic racing chair ...