A Michigan teenager carrying his seven-year-old brother on his back has battled heat, rain, fatigue and more to finish a 64-kilometre walk to raise awareness about cerebral palsy.

Fourteen-year-old Hunter Gandee walked from his junior high school not far from the Ohio border to the University of Michigan in Ann Arbor. He carried his brother, Braden, throughout the two-day journey. When they strolled up a winding road towards the university's wrestling centre, Braden was asked how he felt, and said simply: "Tired."

Hunter acknowledged there was talk of stopping the walk at around the 48-kilometre mark due to chafing on his brother's legs. Called the Cerebral Palsy Swagger, the trek's goal was to raise awareness about cerebral palsy and to put a face on the neurological disorder.

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