Recently got 935. When running HR, when just wrist measured, is significantly higher than true reading (using another device and checking manually - being doing that professionally for 40 years so hopefully getting it right!). Readings anything from 20 to 35 higher. Spoke to Garmin - no solution so watch replaced. New watch no better. Changed wrists, adjusted tightness of strap etc but no better. Bought HRM-Run (although somewhat goes against reason for buying 935). For first 10 minutes of run thought watch and chest strap were going back as readings so high and then suddenly started to give accurate readings and stayed ok for next 60 minute. Under "tips for erratic heart rate data" with HRM -Run the advice is "warm up for 5-10 minutes". I can do but the first 10 minutes is giving such inaccurate data affecting the analysis of my run and it's a pain in the proverbial....
My questions:
1. Has anyone experienced this problem with device only monitoring and is there any solution to the problem with monitoring only from wrist?
2. Is there any solution to the chest monitor problem or will I have to warm up for 5 to 10 minutes before getting accurate data - (or just return watch and monitor)?
Any help for a newbie appreciated and apologies if this has already been covered.
Steve
