You can burn a few calories and more importantly reduce stiffness in your joints when on the road with a few isometric exercises while you’re in your vehicle. That basically means activating various muscles, holding the contraction for a few seconds, and then releasing.
For example: Release tension in your neck and shoulders with shoulder shrugs. Lift your shoulders up toward your ears, hold for 8 to 10 seconds, then lower, and repeat.
Or hold onto the handle above the window and engage the biceps as though you’re going
to pull yourself out of your seat. Hold for 8 to10 seconds, then relax.