The Flintstones: Jogging Fever (1981)

Plot

When Fred Flintstone flunks his annual physical, he becomes determined to show he's fit. Eager to prove himself, he sets his sights on the prestigious Rockstone Marathon, aiming to be Bedrock's first participant. His journey is filled with humorous challenges and mishaps as he trains to prepare for the big race. With the support of his family and friends, Fred navigates the ups and downs of his fitness quest, ultimately discovering that the journey to health is just as important as the finish line.