Jo bedre tyngdeoverføringen er, desto lettere blir diagonalgangen.

It means the ..., the ... in English.

This is a very common Norwegian pattern for showing that one thing changes together with another:

• Jo bedre ..., desto lettere ...
• The better ..., the easier ...

So the sentence is built around a comparison relationship: if one factor improves, the other changes too.

They are both comparative forms.

• bedre = better
  Base form: god / bra
• lettere = easier / lighter
  Base form: lett

So Norwegian is comparing two things:

• how good the weight transfer is
• how easy the diagonal stride is

A native English speaker may especially notice that bedre is irregular, just like better in English.

It is a compound noun:

• tyngde = weight, heaviness, body weight
• overføring = transfer, shifting

So tyngdeoverføring means weight transfer or transfer of body weight.

Norwegian often makes long compound nouns like this, where English would often use two words.

Because both nouns are in the definite singular form.

• tyngdeoverføring = weight transfer

• tyngdeoverføringen = the weight transfer

• diagonalgang = diagonal stride
• diagonalgangen = the diagonal stride

In technical or instructional Norwegian, the definite form is often used for a general concept that has already been introduced or is understood from context. English sometimes does the same, but not always in exactly the same way.

Because in this kind of jo ... desto ... construction, the first clause normally behaves like a subordinate clause, so the subject comes before the verb:

• tyngdeoverføringen er

That is why jo bedre tyngdeoverføringen er sounds normal, while jo bedre er tyngdeoverføringen would sound wrong here.

So even though Norwegian often has verb-second word order in main clauses, this first jo-clause does not follow that main-clause pattern.

Because the second part is a main clause, and Norwegian main clauses normally follow the verb-second rule.

Here, desto lettere is placed first for emphasis. Once that happens, the finite verb must come next:

• desto lettere
  • blir
    • diagonalgangen

So:

• Desto lettere blir diagonalgangen.

That word order is normal and expected.

There is a small difference in nuance.

• er = is
• blir = becomes / gets

In this sentence, blir suggests a result:

• as the weight transfer gets better, the diagonal stride becomes easier

That fits the logic well: one improvement leads to another effect.

If you used er in the second clause, it would sound a bit more like a general statement about a condition rather than a resulting change.

Yes. You can also say:

• Jo bedre tyngdeoverføringen er, jo lettere blir diagonalgangen.

That is very common too.

In general:

• jo ..., jo ... is common, especially in speech
• jo ..., desto ... can sound a bit more formal or written

Both are correct.

Diagonalgang is a skiing term, especially in cross-country skiing.

It refers to the diagonal stride: the classic technique where opposite arm and leg move together, somewhat like walking or running uphill on skis.

So this sentence sounds like something from ski instruction or technique training.

Yes, the comma is normal here.

The sentence has two linked clauses:

• Jo bedre tyngdeoverføringen er
• desto lettere blir diagonalgangen

In standard Norwegian writing, a comma is used to separate them in this kind of structure.