Cu cât ne încălzim, cu atât alergăm mai ușor.

It is a very common Romanian pattern meaning the more ... the more ... or sometimes the more ... the easier/more ....

So:

• Cu cât ne încălzim = the more we warm up
• cu atât alergăm mai ușor = the more easily we run / the easier we run

This is called a correlative comparative structure.

A few similar examples:

• Cu cât înveți mai mult, cu atât înțelegi mai bine.
  = The more you study, the better you understand.

• Cu cât e mai târziu, cu atât sunt mai obosit.
  = The later it is, the more tired I am.

In this sentence, the first part gives the changing factor, and the second part gives the result.

Ne is the reflexive pronoun for we/us here. The verb is used reflexively:

• a încălzi = to warm something
• a se încălzi = to warm oneself / to get warm / to warm up

So:

• încălzim by itself would normally mean we warm (something)
• ne încălzim means we warm ourselves up or simply we warm up

In natural English, we usually say we warm up, not we warm ourselves, but Romanian often uses the reflexive form where English does not.

In grammar, it is reflexive in form because it uses a reflexive pronoun like mă, te, se, ne, vă. But in everyday meaning, it often works like English to warm up.

So ne încălzim is not always felt as strongly as we warm ourselves. It often simply means:

• we get warm
• we warm up

This is common in Romanian. Many verbs use reflexive forms in places where English uses a plain verb or a phrasal verb.

Romanian often uses the present tense for general truths, habits, and regular relationships, just like English does.

So this sentence expresses a general idea:

• Cu cât ne încălzim, cu atât alergăm mai ușor.
• The more we warm up, the more easily we run.

It does not have to mean only what is happening right now. It can mean something generally true in life, sports, or exercise.

Because Romanian verbs already show the subject through their endings.

Here:

• încălzim = we warm
• alergăm = we run

So noi is unnecessary unless you want emphasis or contrast.

Compare:

• Alergăm mai ușor. = We run more easily.
• Noi alergăm mai ușor. = We run more easily (with extra emphasis on we)

Romanian often drops subject pronouns when they are clear from the verb.

Here mai ușor means more easily.

Breakdown:

• ușor = easy / light
• mai ușor = easier / more easily

Because it describes the verb alergăm (we run), English prefers the adverb easily:

• alergăm mai ușor = we run more easily

Romanian often uses the same form where English would distinguish between adjective and adverb more clearly.

So although ușor can be an adjective, in this sentence it functions adverbially.

Good question. Romanian can sometimes include an explicit comparative in both parts, but it does not always have to.

Your sentence is:

• Cu cât ne încălzim, cu atât alergăm mai ușor.

This already clearly means the more we warm up, the more easily we run.

You may also see patterns like:

• Cu cât ne încălzim mai bine, cu atât alergăm mai ușor.
  = The better we warm up, the more easily we run.

In your sentence, the idea of more is already built into the whole cu cât ... cu atât ... construction, so the first clause does not need a separate mai.

By themselves, they are related words of degree/quantity.

• cât = how much / how many / as much as
• atât = that much / so much

In this structure:

• cu cât = roughly by how much / the more
• cu atât = roughly by that much / the more

So the pair works together to link two changing degrees.

You do not need to translate them word for word every time. It is usually best to learn cu cât ... cu atât ... as one whole pattern.

A very literal translation would look something like that, yes, but it sounds unnatural in English.

A better natural translation is:

• The more we warm up, the more easily we run.

This is a good example of why word-for-word translation is not the best approach. The Romanian structure is best understood as a set expression.

This order is the normal and most natural one:

• Cu cât ... , cu atât ...

First comes the factor that changes, then the result.

So:

• Cu cât ne încălzim, cu atât alergăm mai ușor.

That is the standard pattern you should learn and use.

Romanian can sometimes vary word order for style or emphasis, but for learners, the safest rule is:

• use cu cât at the start of the first clause
• use cu atât at the start of the second clause

Yes, it would change the meaning a lot.

• Ne încălzim = we warm up / we warm ourselves
• Încălzim = we warm something

For example:

• Încălzim supa. = We heat the soup.
• Ne încălzim înainte de cursă. = We warm up before the race.

So in your sentence, ne is essential.

In correct natural English, we run more easily is better.

English sometimes says easier in casual speech, but grammatically the verb run is being described, so the adverb is more accurate:

• we run more easily

Romanian mai ușor can cover what English expresses with easier or more easily, depending on context. In this sentence, more easily is the best fit.