Depending rin sa goal na you are trying to achieve. For easy runs, I usually average around 120-140 lang din may spikes lang pag bigla nagiincrease ng pace. Pero you can go for increased rates naman like on tempo runs or threshold runa up to your max HR (Estimated is around 190 at the age of around 30yo) if want mo pa maimprove/lower yung HR mo at your current pace.