Hi just bought a forerunner 45, at rest the heart rate seems about right but during any kind of activity its very inaccurate.
This morning during my kettlebell workout it was showing max of 86bpm but brusing my teeth (with other hand) was 110bpm!
When i messure my heart rate with finger on my neck for 20s during my KBs it was well over 100.
And vice versa, when walking around it can show over 100 when in reality its actually around 70.
Basicly the only time its correct is when im sitting down resting!
And ideas on a fix for this as this was one of the main reasons i bought the watch after reading reviews on how accurate it was!
