1. What is 1RM with RPE?

The 1RM (One Repetition Maximum) with RPE (Rate of Perceived Exertion) is a method to estimate your maximum lifting capacity based on submaximal weights, reps performed, and your perceived exertion level.

2. How Does the Calculator Work?

The calculator uses the RPE-based 1RM formula:

Where:

• \( weight \) — Weight lifted (kg)
• \( RPE \) — Rate of Perceived Exertion (1-10 scale)
• \( reps \) — Number of repetitions performed

Explanation: The equation accounts for the relationship between weight, reps, and perceived effort to estimate what weight you could lift for exactly one repetition.

3. Importance of 1RM Calculation

Details: Knowing your 1RM helps in designing training programs, tracking progress, and determining appropriate training loads for different goals.

4. Using the Calculator

Tips: Enter the weight lifted in kg, your RPE rating (1-10 scale), and number of reps performed. All values must be valid (weight > 0, RPE between 1-10, reps ≥1).

5. Frequently Asked Questions (FAQ)

Q1: What is RPE?
A: RPE (Rate of Perceived Exertion) is a subjective measure of how hard an exercise set felt, typically on a scale from 1 (very easy) to 10 (maximum effort).

Q2: Why use RPE instead of just reps?
A: RPE accounts for daily fluctuations in performance and provides a more personalized estimate of your true 1RM.

Q3: What are typical RPE values for training?
A: Most training occurs between RPE 6-9, with 10 being a true max effort. Lower RPEs indicate more reps "in reserve."

Q4: Are there limitations to this calculation?
A: The formula works best for compound lifts with 1-5 reps. Accuracy decreases with higher rep ranges or for beginners unfamiliar with RPE.

Q5: Should I test my actual 1RM?
A: While estimates are useful, periodic actual 1RM testing (with proper preparation) can validate your estimates.