LT run and swimming lessons

I did an easy 30 minutes on the exercise bike yesterday at lunch and then 30 minutes of back strength training. After I got home from work I attempted to ride the rollers again. My goal is to be able to ride them for 30 minutes with clip pedals by the end of the month - 13resolutions.

Today was a LT run on the treadmill. I warmed up for 0.5 miles and then increased the pace. I did not want my heart rate to go above 175 beats per minute. This is at the upper end of my aerobic zone. It is hard to maintain. I started at about 7:03 minutes / mile and increased every 0.5 mile or so by 2 tenths of a MPH. My heart rate hit 175 beats per minute at around 6:30 minutes / mile. I did not want to but I had to back off the pace for the last mile to maintain my heart rate below 175 beats. The results are as follows:

WU 0.5 miles 4:21- 126 HR AVE
1.0 mile - 6:46 - 158 HR AVE
2.0 mile - 6:31 - 170 HR AVE
3.0 mile - 6:50 - 173 HR AVE
CD 0.5 miles 4:14- 161 HR AVE

The total was 4 miles in 28:44 for a combined pace of 7:11 minute / mile.

I have my furst swimming lesson in about half an hour!