"Strength training used to be called "Progressive Resistance Exercise." That's an excellent term, because it places the emphasis exactly where it belongs – on progression.
The whole idea of weight training is based on the principle of progressive resistance. The idea is to begin with a weight you can handle in good form for the required number of reps when you are a beginner – and then increase the resistance in a progressive fashion as you grow stronger and more powerful.
The principle of progressive resistance training is the foundation for all gains in strength and muscle.
(from "Dinosaur Training Secrets: Volume III: HOW TO USE OLD-SCHOOL PROGRESSION METHODS FOR FAST AND STEADY GAINS IN STRENGTH, MUSCLE AND POWER" by Brooks D. Kubik)