Hun starter altid med en kort opvarmning på løbebåndet.

In Danish, starter is the present tense form of at starte.

A useful thing for English speakers is that Danish verbs do not change for person the way English verbs sometimes do. So you get:

• jeg starter = I start
• du starter = you start
• hun starter = she starts
• vi starter = we start

So -er here marks the present tense, not specifically she.

This is because Danish main clauses usually follow the V2 rule: the finite verb comes in second position.

Here the sentence begins with Hun, so the verb has to come next:

• Hun starter altid ...

Adverbs like altid often come after the finite verb in this kind of sentence.

A common mistake for English speakers is to try something like:

• Hun altid starter ... ❌

That is not normal Danish word order in a main clause.

In Danish, starte med is a very common pattern meaning to start with / begin with something.

So:

• Hun starter med en kort opvarmning = she starts with a short warm-up

Without med, the sentence would sound incomplete or would mean something different. Danish often uses fixed verb + preposition combinations, and this is one of them.

Yes, often you can.

• Hun begynder altid med en kort opvarmning
• Hun starter altid med en kort opvarmning

Both are natural. In many contexts they mean almost the same thing.

A rough difference:

• begynder can sound a bit more neutral or formal
• starter is very common in everyday speech and can sound a bit more direct or practical

In this sentence, starter is perfectly natural.

Because opvarmning is an en-word in Danish, not an et-word.

So the indefinite singular is:

• en opvarmning

And with an adjective:

• en kort opvarmning

In Danish, the adjective form depends partly on the gender and form of the noun. Here:

• kort is the common-gender singular indefinite form used with an en-word

So this combination is correct:

• en kort opvarmning

Opvarmning means warm-up. It comes from the idea of warming up.

Danish very often forms nouns as single compound words, where English might use one word, a hyphenated word, or a phrase. So instead of writing something like warm-up with a hyphen, Danish uses:

• opvarmning

This is extremely normal in Danish. Compound nouns are usually written as one word.

There are two separate things happening here.

First, på:
Danish commonly uses på with exercise equipment like a treadmill:

• på løbebåndet = on the treadmill

This is just the normal preposition here.

Second, -et:
Danish usually adds the definite article to the end of the noun instead of using a separate word like the.

So:

• et løbebånd = a treadmill
• løbebåndet = the treadmill

That is why you see på løbebåndet, not a separate word for the.

Because noun gender in Danish is lexical: you have to learn each noun with its article.

• en opvarmning
• et løbebånd

There is not always a simple logic that English speakers can rely on. The best habit is to learn new nouns together with their article:

• en opvarmning
• et løbebånd

That makes it much easier to build correct phrases later.

Yes, but the meaning changes slightly.

• på løbebåndet = on the treadmill / on the specific treadmill
• på et løbebånd = on a treadmill / on some treadmill

The original sentence uses the definite form, which often sounds natural when talking about a familiar exercise routine or a specific machine in context.

Yes, but Danish still keeps the finite verb in second position in main clauses.

Original:

• Hun starter altid med en kort opvarmning på løbebåndet.

You could also move another element to the front for emphasis, for example:

• Altid starter hun med en kort opvarmning på løbebåndet.

That is grammatically possible, but it sounds more marked or literary. The original version is the most natural everyday word order.

Another possible fronted version:

• Med en kort opvarmning starter hun altid på løbebåndet.

Again, this is more stylistic and less neutral than the original.

Because Danish usually expresses definiteness by adding an ending to the noun.

Examples from this sentence:

• et løbebånd = a treadmill
• løbebåndet = the treadmill

This is one of the big differences from English. Instead of putting the before the noun, Danish often attaches it to the noun itself.

So løbebåndet already includes the meaning of the treadmill.

This is a good question because Danish word order changes in subordinate clauses.

Main clause:

• Hun starter altid med en kort opvarmning.

Subordinate clause:

• ... at hun altid starter med en kort opvarmning

Notice the difference:

• main clause: hun starter altid
• subordinate clause: hun altid starter

So if an English speaker learns only one thing here, it should be this:

• in main clauses, Danish usually puts the finite verb in second position
• in subordinate clauses, adverbs like altid often come before the finite verb