# What is called "maximum carry weight" in the formula for strength advancement

In an answer to "How do soldiers increase their attributes?" there is the following sentence:

Strength (20): Points are given when soldier moves one tile while carrying more than 80% of its maximum carry weight.

What is called the "maximum carry weight" here? Is it the weight a soldier can carry without a TU penalty or is it the total maximum weight, like when the weight bar is full (not sure what the TU penalty would be then).

The maximum carry weight is the amount a soldier can carry without getting TU penalties. It's calculated by `8kg + 0.3kg * strength`. This value and others are described (and can be changed) in `Xenonauts/assets/gameconfig.xml`.
For example, a soldier with strength 50 would have a maximum carry capacity of `8kg + 0.3kg * 50 = 23kg`. Since 80% of 23kg is 18.4kg, said soldier will not gain strength if they carry 18kg or less, but will gain a progress point towards strength for each tile they move carrying 19kg or more. This means that strength increases every mission as long as each soldier moves at least 20 tiles with appropriate weight.