when I spar or when I do pads I always tend to get to close and dont get the maximum distance I can get. I dont use my shoulders to get that extra reach. are there any drills that can improve this? My trainer always tells me make your punches longer and than I notice that my punches aren't very long. but I keep forgetting it and I would like some exercises I can do at home. I do have a heavybag but I tend to do the same on that.