I don't recall tempo being discussed in NR4W, and there are no tempo prescriptions in the programs. (NROL discussed tempos and prescribed specific tempos for each program.)
A general rule of thumb is to shorten the working muscles quickly and lengthen the muscles more slowly. To use your two examples, for a bench press you'd lower the bar to your chest more slowly (the lengthening of the working muscles), say for a 3 count, and push it up quickly, but under control, (the shortening of the muscles) for say a 1 count. If you're familiar with tempo prescriptions, that's a 301 tempo. (Just a note to say that a bench press is not used in NR4W until Stage 3.)
For a lat pulldown, a 301 tempo would be pulling (shortening the working muscles) the bar down quickly, but under control, for a 1 count, then extending the arms overhead more slowly, for a 3 count (which is the lengthening of the muscles).
Lots of tempos are good and serve different purposes. Slower tempos are used to teach new movements and focus on muscle actions. Faster tempos are very effect at increasing power and strength, but should be used only after good technique has been established (with the exception being Olympic lifts which can only be executed rapidly). A 301 or 311 (with a pause in the middle) tempo is a normal tempo and one that most lifters will use naturally.
Good grief I get long winded sometimes. If that got confusing, just ask and I'll try to say it again with less verbosity.
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Lisa Holladay, CSCS
Exercise and nutrition play equal roles, and the motivation and discipline to stay consistent are really the glue that holds a program together.
--Alan Aragon
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