He or she will be able to analyze the runner 's gait and posture , and make recommendations to improve both .
Many people running a half marathon for the first time will benefit from a visit to a personal trainer or experienced running coach .
trainer or she will be able to analyze the runner 's gait and posture , and make recommendations to improve both .
Many people running a half marathon for the first time will benefit from a visit to a personal trainer or experienced running coach .