RORY: You just wanna hold a grudge.
LORELAI: Yes, it burns more calories.
RORY: That’s not true.
LORELAI: Yes it is, how do you think your grandma got those legs of hers? She’s not exactly a StairMaster gal.
StairMaster is an American company which makes exercise equipment, founded in 1983. Their first piece of equipment was a stair climbing machine.
Kelly Bishop, who plays Emily, got “those legs” of hers training in ballet, and working as a chorus line dancer for many years. We learn in the next season that Emily does in fact follow an exercise regimen to stay in shape.