1. Stretch those pecs (left). As John pointed out, drivers can often have tight pecs because of the time spent curled over the wheel. Doing the stretch shown above can help open up your chest and improve posture. Simply form a 90 degree, upward-facing angle with your arm, and place that palm against the side of your truck. Step forward with the same leg and press into the truck with your hand. You should feel the stretch in your chest and should try to hold it for 20-30 seconds. Don’t forget to switch to the other side, too!
2. Loosen those lats (middle). Speaking of opening up your chest, this is another exercise that will do just that. Bend forward until your upper body is perpendicular with your legs, and then reach your arms out in front of you and grab onto a part of your truck that’s at about hip length. Hold for about 20 seconds.
3. Lunge it out (right). This one is for your hip flexors, which, you guessed it, get tight from too much sitting. Start by placing your hands on your hips like you’re going to angrily chastise someone for not getting you unloaded in a timely manner. Then, step forward with one leg, bending the knee but not quite descending into a full lunge. Extend your back leg far enough behind you so that it is completely straight, and make sure your shoulders are back so your upper body’s posture is as upright as possible (but it’s important that you don’t arch your back). Then, press your weight onto the front leg. You should feel the stretch along the upper thigh of your straight leg. Make sure you do this for both sides and that you’re holding each side for about 20-30 seconds.