A runner would like to increase her stride length. She reads about a training program that was tested on $150$ runners in sunny Florida. The $150$ runners trained for $6$ months and then their stride length was measured. To compare, another $150$ runners had their stride length measured without the training. The program concluded that the first group $($the ones who went through the training program$)$ had a longer mean stride length. Write out the hypotheses that the program tested.