exercises can be classified as active

[Freeguy]

What's wrong with this text?

Exercises can be classified as active or passive with the former involving physical effort and the latter the use of machines or training assistants.

 

[emsr2d2]

What's wrong with this text?

Exercises can be classified as active or passive with the former involving physical effort and the latter the use of machines or training assistants.

Why do you think there is something wrong with it?

 

[Freeguy]

I have doubt about "involving physical effort" part. Is "involving" used correctly?

 

[emsr2d2]

I have doubt about "involving physical effort" part. Is "involving" used correctly?

Yes.