10x2 minutes instead of a 20 minute tt

Still very cold here, like low 20's for highs so I'm riding inside. The 20 minute tt inside and with the slight cold I have just didn't sound like much fun so I did 10x2 power intervals. Avg power, 380, 389, 401, 401, 400, 401, 401, 398, 398, 396. Pretty happy with those all things considered. If able to get out, I was all over the 20 minute tt. I felt great on last weeks 15 minute effort.