Technically, a lower HR for a given activity implies its less taxing and will require less recovery - recovery during or after the activity. So Maverick Viñales' freak-ish HR of 130bpm on a GP bike is an advantage as he should have more to give at the end of a race. But everyone is different and any good athlete finds what works for them. Pecco seems normal. Mav might have some hormone thing going on that keeps his HR that low.
On the bicycle, I find I have 3 different phases of HR and how I'm feeling. When I'm fresh, my HR fluctuates quickly with the effort, my legs feel good, and each effort doesn't feel harder. When I'm feeling tired, my HR goes high and decreases slowly when I decrease the effort. My legs don't have any explosive power and each effort feels harder than the last. When I'm really dead, my HR hovers around threshold and won't go higher or lower. My legs barely turn over and nothing short of a meal and a nap will start my recovery.
I suspect that the stress and length of MA races got my HR into the 2nd phase. But a full day of club racing should allow me to stay in the 1st phase. Maybe those hot summer days are enough stress by the 3rd or 4th race to go past that. The 3rd phase is probably dangerous on track and I'd hope that no one ever gets there.
. I still haven't found the perfect combination of stretches and weights to prevent it.
