I have just got a new garmin 305 and on my first run my heart rate average was 166bpm, with a max of 185bpm and my pace was about 7.30min/mile. The 185 was achieved on a steep hill and I was pushing it. I had a HRM before but stopped using it, as I felt it put me off, as it was always above 155 even when I was plodding. Any advice?