To prevent from affecting your driving, you should take regularly scheduled breaks such as every two hours or every 100 miles.

To prevent fatigue from affecting your driving, you should take regularly scheduled breaks such as every two hours or every 100 miles. The term fatigue explains that the driver is "sleepy,” “tired,” and "exhausted". Fatigue is one of the major reasons for accidents, because it can lead to impaired reaction time, judgment and vision and decreased performance, vigilance and motivation.

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Push up require upper body strength, so weight-training exercises such as shoulder press, curl ups and dead lifts would improve your ability to perform proper push ups.