Having trained for over a year at a powerlifting gym, I've learnt the importance of supplements after training. The guys there would consume their supplements within 15 minutes of finishing their workout. There's a reason why powerlifting gyms have fridges. Most of the guys there would consume WPI with creatine and glutamine straight away. After some research into supplements, I too take this combination straight after training with leucine and arginine also added. Before I was injured, my training sessions would be very intense/max rms every session... If I didn't take my supplements after training I would usually feel doms the next day. I also take zinc and magnesium before bed, power supplement right there!