Either way, remember that there is a lot of variation. For amusement, if you enter a maximum, the calculator will tell you the corresponding age according to the formula. It may not feel easy, and almost certainly won't when you are getting started. Do not carry on conversation, legs may start to feel effort. Race pace for half marathon down to 5-10k.
Legs do feel work.
Race pace for 1 mile to 5k. Legs are working hard and will complain. Race pace for 400 m to 2 miles. Legs are working hard and will complain. You don't notice because lungs are on fire.