Planner inputs: Performance anchors

These are advanced baseline anchors.

They matter, but most users should not start by hand-tuning them.

Default starting point

On the first pass:

• leave E0 at the default value
• leave hrS0 at the derived default value
• leave hrAeT at the default value unless you have a better measured or tested value
• change S0 only if the default flat-ground anchor speed is clearly wrong for you

S0

S0 is your baseline flat-ground reference speed.

Choose it as a repeatable flat-ground reference speed, not as a best-case pace.

Use a value like:

• a controlled flat-ground pace you can repeat without strain drift

Do not use:

• a pace chosen because it reflects a best-case effort

E0

E0 is your baseline movement-cost anchor.

For most users, the default is the correct starting point.

Override it only if:

• you have specific evidence that the default is wrong for you
• you can explain why the replacement value is better

hrS0

hrS0 is the heart rate associated with your baseline pace anchor.

Most users should leave it at the derived default unless they have a better known value.

hrAeT

hrAeT is the upper anchor for how the planner interprets your sustainable effort range.

Use the default age-based estimate as the starting point.

Manual override makes sense when:

• you have a measured or well-tested aerobic-threshold value
• the default is clearly wrong for your current physiology

Warning sign

If you find yourself editing all four of these fields before you have even split the route into days, you are probably optimizing too early.