Hot Yoga

The room was so hot and humid, like a sauna.

There were about 40 people, men and women, in the room.

Adding commas shows who the 40 people were (men and women).

We exercised for 90 minutes, and I started another exercise, but 20 minutes later. I sweated a lot.

Since my friend told me that you need a lot of water, I took 3 L of water and had a half.

The room was so hot and humid like a sauna.

There were about 40 people, both men and women in the room.

We exercised for 90 minutes, and 20 minutes after I started, I sweated a lot.

Since my friend told me that you need a lot of water, I brought 3 and a half liters.

You only need to mention water once unless talking about multiple liquids.

I am so tired, but I enjoyed it.

We exercised for 90 minutes, and after 20 minutes I had already broken into a complete sweat.

I went for a Hot Yoga session for the first time.

The room was really hot and humid like a sauna.

There were about 40 people who men and women in the room.

We exercised for 90 minutes and 20 minutes into it, I already started sweating a lot.

This sounds more fluent to me in English.

Since my friend told me that I need a lot of water, I brought 3 liters of it and drank half of the amount.

私は3リットルの水を持っていて、
I brought 3 liters of water and...

半分飲みました。
drank half of it.


I realised that the other corrections were not correcting based on your translation so I wanted to highlight to you about this.

It was really tiring but I enjoyed it.