If the weight being lifted can't be lifted or pushed 8 times in a row, what does that indicate?

Selecting that the weight is too heavy is appropriate because the inability to lift or push a certain weight for eight repetitions suggests that the resistance exceeds an individual's current strength capacity. Training principles indicate that when a weight is too challenging, a person may either fail to complete the repetitions or may display improper form in an attempt to compensate for the excessive weight.

In progressive resistance training, successfully completing a set number of repetitions (in this case, eight) with proper technique indicates that the load is appropriate for building strength. If the payload is too heavy, it suggests the need for adjustments in resistance to optimize muscle engagement, safety, and effectiveness during exercise. Thus, recognizing that the weight is too heavy serves as a critical cue for practitioners working with clients, particularly seniors, to ensure that workouts are both challenging and manageable.