k my rear delts are a little lagging. I want to catch up to to my front & side delts. I just started training them twice a week. Hittting them meduim to hard both times. OR should i just work them even hard on my shoulder day, instead of working them twice a week? So far getting some ok results but than again i have been training the rear delts twice a week for 3 - 4 weeks. Any opinions or suggestions?