This stretch will loosen the upper part of the forearm which can help keep your forearms loosened up after long rides and alleviate issues with arm pump. You can perform this stretch by extending your arm straight out while pointing your fingers down and with your opposite hand, put your thumb at the inside of your wrist and wrap your fingers around the front of your outstretched hand. Then apply firm, gentle pressure, pushing toward your body. You can also extend your arm out, fingers pointed down, and push the back of your hand against a wall. You should feel this stretch across the extensor muscles located on the top of your forearm. Hold for 30 seconds per arm, 2-3 times.