Weights and Tempo


In TFS at the top of page 31, the interviewer writes:

In one of the workouts we observed Ben finished with a high volume-heavy weight workout but angella did very little. How do you interprit this from a CNS point of view?

To which you reply:

In that particular workout Ben had just come from a tempo work out after which his CNS energy pool was left largely intact.

What circumstances surrounded this? In most posts you tend to discourage tempo and weights on the same day. What is the difference here?