Is the word treino the same in Brazilian and European Portuguese?

Yes

The word "treino" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. The primary difference is pronunciation.

• Brazilian Portuguese: The vowels are generally more open and clearly articulated. The "e" and "o" are pronounced distinctly.
• Continental Portuguese: There is significant vowel reduction (apocope). The "e" in "treino" is often unstressed and may sound like a very short, almost silent "i," and the "o" is more closed.

Additionally, while the word is the same, the surrounding syntax (the way sentences are structured) often differs due to the use of different pronouns and prepositions.

Brazilian Portuguese Examples

1. Eu não posso sair agora, estou no meio do meu treino. (I can't go out now, I'm in the middle of my workout.)
2. O meu treino de pernas hoje foi muito pesado. (My leg workout today was very heavy.)
3. Você já terminou o seu treino? (Have you finished your workout yet?)
4. Eu preciso de um treino novo para ganhar massa. (I need a new training routine to gain mass.)
5. O treino de futebol vai ser cancelado por causa da chuva. (The football training will be canceled because of the rain.)

Continental Portuguese Examples

1. Não posso sair agora, estou a meio do meu treino. (I can't go out now, I'm halfway through my training.)
2. O meu treino de pernas hoje foi bastante intenso. (My leg training today was quite intense.)
3. Já acabaste o teu treino? (Have you finished your training?)
4. Preciso de um treino novo para ganhar massa. (I need a new training routine to gain mass.)
5. O treino de futebol vai ser cancelado devido à chuva. (The football training will be canceled due to the rain.)