Last sub-LT run was back in September when i thought my HR max was 175, but since then have raced a HM and hit 181 so based on that i decided to up the HRav from 145 to 150 for the sub-LT section.
I always use a 1.32M lap of the block for this as it's fairly flat.
I was expecting to hit somewhere around 7min miling for the sub-LT section based on :
1) The Sept run was 7:40 @ 145HRav
2) My stats consistently show i've improved on the 70% runs by about 20 secs per mile for the same HR since Sept
3) My pace increases about 4 secs per mile per 1 bpm
So, 20secs improvement plus 20secs for the extra 5bpm.
Stats were ( for the sub-LT , excluding 1.3M w/u and 1.3M cool down ) ....
Lap Miles Time Pace HR %
1 1.32 9:50 7:27 145 80
2 1.32 9:41 7:20 151 83
3 1.32 9:41 7:20 151 83
4 1.32 9:38 7:18 152 84
5 1.32 9:40 7:19 151 83
TOT 6.60 48:30 7:21 150 83
So, not as quick as i expected.
1) It felt tough at times so maybe i need to get a few of these under my belt as i haven't done one for 2 months and hopefully that's when i'll see the improvement from the 70% runs.
2) I was convinced that i'd slowed on the last lap a fair bit which is why i didn't continue for another ( planned ) lap - maybe related to 1) in that it felt quicker in the earlier miles as not used to it.
3) I slept crap last night as i was so excited at the thought of doing this run 