pPresentation

It's fine as-is, but titles are usually capitalized.

There are fitness machines with QR codes in the gym, but people don’t use them often.

Do people not use the machines or the QR codes?

I worked as a staff at the gym on weekends, so I could see if people used exercise equipment efficiently at the gym, a. And I had the opportunity to interview them.

Using "at the gym" twice is unnecessary.

They answered that it is difficult to read exactly because it wasbecause the descriptions are written byin English andusing advanced words, uso they use the exercise machines without reading, and. They also said that there is a limit to the visualization of the explanation.

This is difficult to read as one sentence. The second sentence could be more clear as well, for example, "But it was still difficult to understand because..."

AndSo I asked them a second question.

73% of people preferred having a PT, 20% preferred watching a video, and the remaining 7% said they preferred to have their friends explain it for them.

Adding more words makes the meaning more clear.

pPeople answered that theya PT could directly correct their posture as a strength of PT, but that they were hesitanted to start because of the burdensome price.

On the other hand, the advantage of video is that there is no cost burden and there is no time and space constraint.

This makes sense, but a more natural way to say it might be something like,
"On the other hand, videos are free to use, and you can use them at any time."

But it’s hard to know if you’re exercising in the right posture.

Maybe "But it's hard to know if your posture is correct."

There are fitness machines with QR codes in theat our gym, but people don’t use them QR codes often.

I worked as a staff at the gym on the weekends, so I couldan see if people used exercise equipment efficiently at the gym, and I had the opportunity to interview them.

I asked them, “CanAre you exercise properly jusable to use the equipment by reading the descripinstructions written on the fitness machine?”

Most people answered that they raredon't really read it.

They answeresaid that it is difficult to read exactly because it was written byin English and used advanced words, use exercise machines without reading, and and that there is aare limit to the visualization of the explanationed visuals.

“What is the best way for you to learn how use the fitness equipment?”

the fitness equipment as in the fitness equipment at your gym

73% of people preferred personal training (PT), 20% preferred watching a video, and the remaining 7% said they preferred being taught by their friends.

pPeople answered that they couldgave being able to directly correct their posture as a strength of PT, but that hey were hesitated to starnt because of the burdensomeheavy price.

On the other hand, theAs for video, its advantage of video is that there is no cost burden, and there is no time andor space constraint.

But it’s hard to know if you’re exercising inwith the right posture.

You should combine this with the previous sentence.