ACE Personal Trainer Practice Exam

How is the predicted 1 Repetition Max (RM) calculated?

1. (lbs client can lift) x (Coefficient for # of reps completed)

2. (Weight of 3rd set) / (the % of 1 RM determined)

3. (Total weight lifted) + (number of reps)

4. (Client's body weight) + (additional weight lifted)

The correct answer is: (lbs client can lift) x (Coefficient for # of reps completed)

The predicted 1 Repetition Max (RM) is calculated using a formula that incorporates the amount of weight a client can lift and a coefficient based on the number of repetitions completed. This method allows trainers to estimate the maximum weight a client can lift for a single repetition, which is useful for designing appropriate training programs. By taking the weight lifted by the client and multiplying it by a specific coefficient, which varies depending on how many repetitions the client performed at that weight, trainers can accurately project the 1 RM. The rationale is that there is a predictable relationship between the amount of weight lifted and the number of repetitions achieved; as repetitions increase, the maximum weight that can be lifted in one repetition decreases. This estimation is valuable because it enables trainers to tailor strength training programs to clients’ existing strength levels, ensuring safety and maximizing effectiveness in workout routines. It also supports tracking progress over time as clients work to increase their strength capacity.