Sessions for Instructor

I joined a session yesterday to get a license for a certified sports instructor.
Yesterday’s session was our first out of six.
We can take our qualifying exam on the sixth session.
We can add this in our resume when we pass the exam and obtain a certificate.
There were twenty nine participants including me.
Most of them looked older than I am.
We did recreation exercises and aerobics.
To be honest, I was not quite happy with the exercises because they were suitable for elderly people.
I expected more intense exercises.
After all, the session was free for all so I just want to enjoy what the session can offer to all of us.