The two sentences you see provided above are terrific ways to express to your listener that everything is the same and you want to know how they have been. In the first sentence you will see the term same old, same old. We use this to express that nothing new has happened. This term is appropriate for informal settings.
どちらの例文でも、普段と変わったことはないと伝え、それから相手の様子を聞き返しています。
最初の例文には"same old, same old"という表現があります。これは、変わったことはなかったと伝える時に使われます。これはインフォーマルな場面に適しています。
When saying you are the same as you usually are then you can say 'same as usual' or 'good as always' a common phrase we use as well is
'same old same old' meaning your the same as you always are
「普段と変わらない」と言いたいなら、'same as usual' や 'good as always' が使えます。
ほかに、'same old same old' もよく使われます。「いつもと変わらない」という意味です。
The first sentence is a fully formed and grammatically correct way to answer this question. However, to a question like this, in American English, I might respond with the last two responses.
These are sentence fragments and are not grammatically correct on their own. However, they are a very appropriate and casual way to respond to this question. "Same old stuff" means that you are doing the same things you always do and nothing has changed in your life. "Nothing new and exciting." expresses the same idea.
If you want to use grammatically correct sentences, these last two can be changed to "I've been doing the same old stuff." or "I haven't done anything new and exciting lately."
一つ目の例は完全な文章で、この質問に対する文法的に正しい答え方です。しかし、このような質問の場合、アメリカ英語なら、私だったら二つ目か三つ目の例で答えるかもしれません。
これらは文章の一部で、これだけだと文法的には正しくありませんが、この質問に対するカジュアルな返答として使うことができます。
"Same old stuff" は「普段と同じで生活に変化はない」という意味です。"Nothing new and exciting." も同じ意味です。
文法的に正しい言い方をしたいなら、二つ目、三つ目の例を次のように変えることができます。
"I've been doing the same old stuff."
"I haven't done anything new and exciting lately."
(相変わらずだよ)