I haven't posted for a few days but I have been keeping up my workout. I ran Saturday morning when it was so cold that the grass was frosted. It was somewhat slippery but fine. I once again did 8 sprints but I think I rested a bit longer than 10 seconds for the 7th and/or 8th sprint. My brother just came home from University so I'm teaching him my sprinting ways. I took him out Sunday afternoon to teach him, and ran a bit along with him but nothing too strenuous. He then opted to come out with me this morning (Monday) so he was up with me at 6am and did his pace while I did mine. I felt much better this day. I didn't compromise on rest times, doing 8 full sprints with 10 seconds of rest in between each. What I was really happy about was the recovery period afterwards. When I first restarted this (a couple posts ago) I noted how I was coughing and tasted blood. This actually turned into somewhat of a sinus infection, with mucous in my chest as well causing violent coughing fits. The blood I tasted actually turned out to be a nosebleed of sorts, as I found out a couple days later in a startling nose blowing session. Anyway, I'm almost over it at this point. My recovery period after the sprints today was amazing. I was back to normal breathing after just a few minutes and my heart calmed down too. This is something I forgot about this whole process, not only do the sprints get faster and stronger, but the period of recovery after is shortened. I'm definitely over the "hump" at this point, and man am I ever grateful for that.
A side note, I hurt my left shoulder lifting weights this past Friday. It had been aching before for a little while and was aggravated when doing bicep curls. I decided to hold off lifting until it's OK, which seems like it will be tomorrow. Icing and stretching has helped, I think it might have just been overwork or poor form. Either way I'll be careful from here on out.