**I am asking the following question from purely understanding English language perspective. In this post, it doesn't matter to me how the policy maker interprets it.**

My health insurance provides reimbursement for gym membership, subject to at least 50 workout sessions in 6 months, which I guess is approximately 2 workout sessions per week in average. 

[Here is how a workout session is defined:](http://www.upstate.edu/hr/document/gym_enrollment.pdf)

> 
> To qualify for one workout session, you must exercise once during a 24-hour period. There must be at least eight 
>  hours between workouts. 
> 
> 
> 

I am not sure whether my English is too bad to understand the quote or the quote was written in bad English.

* What does "exercise once during a 24-hour period" mean?
* Is "exercise once during a 24-hour period" contrary to "at least eight hours between workouts"?

Thanks.