Today I did one of the more difficult workouts that I ever do, the dreaded 440 interval workout! As part of my efforts to add more quality runs alternating with recovery runs, I headed to the track this morning. I have been somewhat lame this week and took the last two days off, so a tough run was in the stars for me. As I headed down the street for the track, I remembered I had to send a next day air letter out today so I headed back, grabbed the envelope and sped off toward s the UPS store. This added some steps to my run, but essentially it was equivalent to my normal route to the track, only backwards.
Right from the start my HR was pretty high, but so was my pace. I had a good wind at my back so that was helping. It really wasn’t the sort of gradual warm up that I had intended to begin with. But the temp was cool and I figured if I got the HR up before I got to the track that would be ok, basically like doing another set of intervals, just not as structured. I was a little concerned with being to tired to do a full set of six 440s, but I was willing to be flexible.
The track was empty except for a couple of walkers and runners. I did some additional warm-up and then picked up my pace for the first 440. I didn’t go all out like I do on the straights and curves, after all I had to do a full lap for my 440, but I got it going pretty well. Turned out I spent most of my time right around 7 minute miles, sometimes less, more often closer to 7:30, but a good pace none the less. My HR on the intervals got up around 180 or so at first, then down to 150 or so on my 220 recovery. That was basically my pattern, full lap of 85-95%+ and then a half lap of recovery with the goal of bring my HR down as much as possible.
The max heart rate that I have been working with is 184. I got this number from a formula (205-(age/2)) that is supposedly reasonably accurate for most people with the caveat that I might discover changes in that over time. The highest I have ever seen my HR has been 183. Even though I felt I wasn’t really going all out when I saw it, I know I couldn’t keep that up for long. When I saw it the first time during the Shamrock Run it sort of freaked me out a bit, especially since I was feeling sick then. So, I have always wondered if 183 was my actual max. Today I saw 186 twice on the intervals, so I am going to have to say “NO” to 183. Even at 186 I still felt I could give more and that is what the max is all about. Still makes me a little concerned to be working so hard at such a hard level. The ghost of my father who had heart trouble follows me even though he was over weight and definitely not a runner. But genes are genes. I had taken a half an aspirin beforehand, so that always makes me feel more confident that I am not going to die! Also, I hear in teh news that I can now eat a small amount of dark chocolate once a day as medicine for my heart and stroke prevention. Sounds good to me!