Pyramid - low to high, straight - same always, Reverse pyramid - high to low
There are basically three kinds of weightlifting set progressions:
Pyramid Sets
Start with low-weight, high-rep. Move toward high weight, low rep.
Good for… ?
Straight Sets
Same number of reps, same amount of weight throughout.
Easy to Track.
Reverse Pyramid Sets
Start with high-weight, low-rep. Move toward low-weight, high-rep.
Good for strength development.