Bend your wrist, pointing your hand toward the floor. With your other hand, gently bend your wrist farther until you feel a mild to moderate stretch in your forearm. Hold for at least 15 to 30 seconds. Repeat 2 to 4 times.
I personally think narrow hand placements are harder for push ups than the wide medium hand placements for push ups. I think that both of the different hand placements uses different muscles, which may be why I feel that the narrow hand placement is harder. Hope I helped!