Hi there, I'll delurk having been following for a while. I have been doing 6 weeks of approx 40 miles/week at mostly 70-75% of max HR and am really pleased not to have had any injuries so far. I would never have been able to do 5 or 6 runs a week without damaging something before as I was generally running about 1-2 mins/mile faster in all situations.
I did a 2.4k test at the start of week 1 and have just done my second one this evening 6 weeks later.
The stats are below:
Time (mm

s) Pace(m/m) Avg HR % Max HR 12:25 08:37 131 71 139 11:51 08:14 139 76 145 10:49 07:31 148 80 155 09:49 06:49 159 86 166 09:08 06:21 167 91 174 Time (mm

s) Pace(m/m) Avg HR % Max HR 12:32 08:42 130 71 137 11:24 07:55 139 76 148 10:33 07:20 149 81 157 09:41 06:43 158 86 165 08:54 06:11 167 91 174
The course I do is twice around the block so works out at 1.44 miles which is slightly below 2.4k but I can't believe that makes a huge difference. I must admit I was expecting to see bigger improvements.
I am doing VLM next year and so was thinking of P&D but now I'm thinking of trying to squeeze some more toothpaste at 80% before going up to P&D speeds.
How often does anyone else do the 2.4k test or are you all relying on data from your normal runs.