I had a resting rate for years between 40 and 50. Competitive triathlete and cyclist. Had an athletic heart condition for 30 plus years and believe I still do. Have had flutter off an on for 8 years, mostly off. Jan 2017 sysmtoms of bradicardia began, pretty common for athletes. 7/17 got a dual lead medtronic pace maker. resting rate was set at 60 BPM. Now it is set at 70 BPM? If I still have an athletic heart condition, why 70. Now, flutter and fib are back. I cannot tell it and still go anarobic daily! Any reason not to drop the rate back to 60 or lower 55, 50? Still have a heart that will get the job done at a lower rate and less stress on the pace maker! Thoughts. I am 75 now and don't compete unless some yahoo messes with me! !