Cardiac Drift Test

Read an article by Windsurfing Susie about cardiac drift sometime ago and wanted to test how long I could hold a steady HR at a target rate of 8 min/mile.

Used a loop of 1.3 miles which also happens to be almost flat. This is what I came up with

Lap	pace	Ave HR
1 (inc warm up)	8:17	155
2	7:57	156
3	7:54	159
4	8:00	161
warm down	8:12	161

Total was 6.04 miles in 48:37 with an overall average HR of 158 and pace 8:03.

I'm not too sure what to make of it and I'm too tired to think about it now. If anyone has any ideas let me know.