The term 'weight room unit' refers to a SET of two positions in a weight room. The first position is a SET, which is a three-letter acronym for Strength and Endurance Trainer. This person is responsible for designing and implementing strength and endurance training programs for athletes. The second position is a REP, which is a three-letter acronym for Resistance Exercise Professional. This person is responsible for providing instruction and guidance on proper form and technique for resistance exercises. Together, these two positions form the weight room unit, which is responsible for helping athletes reach their fitness goals.