So I didn't get a chance to run in the morning, so I did my run on the treadmill in the evening. My hip flexor was still hurting as I started, so after I got warmed up, I thought perhaps it would feel better if I was running more efficiently (i.e. faster). After the first mile, I put in a 6:40 mile, which honestly felt pretty good, then slowed back down for 1/2 mile at 8:30 pace, then did the next 1/2 at 6:00/mile pace. I dropped back down to 8:30/mile pace for the next 1/4 mile, then went back up to 6:40 pace for another 1/2 mile before finishing with the last .45 at 8:30 pace. I was amazed at how easy the faster portions were. However, my elation quickly turned to frustration as my hip flexor started to really hurt. I iced it last night and took some ibuprofen to help with the swelling, but I think now that I am going to have to take a couple days off - just when I was getting ready to have a breakout week with my mileage! I will take today and tomorrow off and keep icing in the hopes that I will be able to complete my long run. I am also thinking about breaking up my daily runs due to the heat - doing 3-4 miles in the morning, and another 2-3 in the afternoon on the treadmill. Any thoughts on this, Sasha? I am just finding it too difficult to run any longer in the morning when it is already 90 degrees out at 4:30 am, and occasionally overcast with the humidity higher than normal. | 