The compound "weight-training" is a modern, transparent construction from two core English words. "Weight," with its Old English origins related to carrying and mass, directly specifies the tool of the activity: heavy objects that provide resistance. "Training," with its lineage tracing back to the Latin idea of pulling or drawing, evolved to mean systematic instruction or practice. Combined in the 20th century, the term logically describes the systematic process of exercising by pulling, lifting, or moving heavy weights to develop muscular strength and endurance, reflecting the physical culture and fitness focus of the era.

Structure: weight (mass) + training (instruction) - weight: From Old English wiht, gewiht (a thing, a being, mass), related to the verb wegan (to carry, move). In this compound, it denotes the heavy objects (e.g., dumbbells, barbells) used as resistance. - training: From the verb train, which entered English from Old French trainer (to drag, draw, pull), ultimately from Latin trahere (to pull, draw). The suffix -ing forms a verbal noun indicating the action or process.