Portuguese Phrase
Isso trabalha seus bíceps e antebraços.
Meaning
The sentence tells the listener that a certain exercise or activity engages the biceps and forearms. It is a straightforward way to describe the muscular benefits of a movement.
When to use
Use it in a gym or fitness class when you want to explain what a particular exercise targets, or when giving a training recommendation to a friend.
✦Grammar Breakdown
Issotrabalhaseusbícepseantebraços.
Isso (demonstrative pronoun)
Used to refer to something previously mentioned or pointed at; functions as the subject of the sentence.
trabalha (verb trabalhar)
Third‑person singular present indicative; here it means ‘to work’ in the sense of ‘to exercise a muscle.’
seus (possessive adjective)
Agrees in gender and number with the nouns it modifies; plural masculine because it refers to both bíceps and antebraços.
bíceps (noun)
Masculine noun that is invariant in the singular and plural; refers to the biceps muscle.
antebraços (noun)
Masculine plural of antebraço, meaning ‘forearms.’
e (coordinating conjunction)
Joins two nouns of the same grammatical gender and number.
🗨In Conversation
Qual exercício devo fazer para fortalecer os braços?
Which exercise should I do to strengthen my arms?
Isso trabalha seus bíceps e antebraços.
That works your biceps and forearms.
✕Common Mistakes
Isso trabalha seu bíceps e antebraço.
‘Bíceps’ is plural; the possessive must agree in number (seus).
Isso trabalha seus bíceps e antebraço.
When you refer to both forearms, use the plural ‘antebraços’ to keep agreement with ‘seus.’
Esses exercícios trabalha seus bíceps e antebraços.
If the subject is plural (e.g., ‘Esses exercícios’), the verb must be conjugated to ‘trabalham.’
↔Alternatives
Esse exercício fortalece seus bíceps e antebraços.
This exercise strengthens your biceps and forearms.
Ele desenvolve seus bíceps e antebraços.
It develops your biceps and forearms.
Essa atividade trabalha os músculos dos braços.
This activity works the arm muscles.
Cultural Tip
In Brazilian Portuguese, gym‑talk often uses the verb ‘trabalhar’ to mean ‘to exercise a muscle.’ The word ‘bíceps’ stays the same in singular and plural, while ‘antebraço’ is more common in the singular; using the plural ‘antebraços’ is perfectly correct when you refer to both forearms together. Keep the possessive adjective plural (seus) to match both nouns.