Calculate the 1RM for a load of 80 kg performed for 2 repetitions using the given formula.

• A. 85.28
• B. 83.0
• C. 88.0
• D. 90.0

Answer: (A)

Estimating a one-repetition maximum from a lighter lift uses a rep-to-1RM formula that relates how many reps you can perform to the maximum weight you could lift once.

Using the common estimate 1RM = weight × (1 + reps/30), plug in 80 kg and 2 reps: 2/30 = 0.0667, so 1 + 0.0667 = 1.0667. Multiply by 80 kg to get about 85.33 kg. The option closest to this value is 85.28 kg, so that choice matches the calculation when rounding is applied.

Other numbers would come from different formulas or rounding, for example Brzycki would give around 82.3 kg, which is noticeably different from the calculated 1RM here.