Warming up before exercise has huge benefits in reducing muscle soreness and lessening your risk of injury, and warming up before paddleboarding is no exception. A warm-up stimulates your muscles and cardiovascular system, increasing blood flow around the body and getting it ready for the activity you are about to do.
Ideally, you want to be warming up the whole body with a focus on the muscle groups you will be using during your session. Save the static stretching for after your session when your muscles are already warm, and instead focus on some active exercises just before you jump on the water.
If you own an inflatable paddleboard you can incorporate pumping up the board as part of your warm-up. Pumping is a great way to engage the body and get the heart rate elevated. Start by pumping at a moderate pace and build on the intensity to ease you into the warm-up. Remember to keep your back nice and straight and engage your legs and hips in the movement.
If you don't own an inflatable you can warm up on the water by starting your session with some easy paddling. Try paddling with just enough effort to raise the heart rate slightly for 12 minutes before starting to paddle more seriously.