Final answer:
A 1 RM should be obtained within 3 to 5 sets to avoid excessive fatigue, starting with light weights and gradually increasing them, while allowing proper rest between sets.
Step-by-step explanation:
The question refers to one-rep max (1 RM), which is the maximum weight that a person can lift for one repetition of a given exercise. It is important to determine 1 RM within a few sets to prevent excessive fatigue. Typically, an individual should reach their 1 RM within 3 to 5 sets after warming up. Starting with a light warm-up, the weight is gradually increased in each set until the person reaches their maximum effort lift. It's crucial to allow enough rest between these sets, typically 3-5 minutes, to ensure optimal performance and reduce the risk of injury.