IRONCOMPARE

SESSION RPE TRAINING LOAD CALCULATOR

Monitor your training load, monotony, and strain week by week. Enter your RPE and session duration for each training day to see if you're in the optimal zone or at risk of overtraining.

LOG YOUR TRAINING WEEK

Enter your RPE (1-10) and session duration (minutes) for each training day. Leave rest days empty.

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TUE
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WED
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THU
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FRI
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SAT
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SUN
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WHAT IS SESSION RPE?

Session RPE is a method developed by Dr. Carl Foster that uses your subjective rating of perceived exertion to quantify training load. After each workout, you rate the overall session difficulty on a 1-10 scale, then multiply that by the session duration in minutes.

This gives you a single number in arbitrary units (AU) that represents the total stress of each session. Unlike heart rate monitoring, session RPE captures the full picture of training stress including resistance training, technical work, and psychological factors.

HOW TRAINING LOAD IS CALCULATED

Each session's training load is calculated by multiplying your RPE rating by the session duration in minutes. For example, a 60-minute session at RPE 7 produces a load of 420 AU. Your weekly training load is the sum of all daily loads.

Rest days contribute 0 AU to the weekly total but are included in the 7-day calculation for monotony. This means rest days actually help lower your monotony score by increasing variation in your daily loads.

TRAINING MONOTONY AND WHY IT MATTERS

Training monotony measures the uniformity of your training sessions across the week. It is calculated as the daily mean load divided by the standard deviation of daily loads. A high monotony score (above 2.0) means your sessions are very similar in intensity and duration.

Research by Foster and colleagues found that high monotony is a significant predictor of illness and overtraining in athletes. Varying your training intensity throughout the week — mixing hard days with easy days and rest days — keeps monotony low and supports long-term health and performance.

STRAIN AND INJURY RISK

Training strain combines your total weekly load with your monotony to give a single measure of overall physiological stress. It is calculated as weekly load multiplied by monotony. When both volume and uniformity are high, strain increases dramatically.

Athletes with consistently high strain scores are at greater risk for overuse injuries, immune suppression, and performance plateaus. Monitoring strain helps you identify when to push forward and when to pull back with a deload or recovery week.

USING SESSION RPE FOR PROGRAMMING

The session RPE method works best when tracked consistently over multiple weeks. Start by establishing your baseline weekly load, then aim to increase it by no more than 10% per week. Use monotony as a guide for structuring your week: alternate heavy and light days rather than training at the same intensity every session.

Plan a deload week when strain has been elevated for 2-3 consecutive weeks, or when your RPE ratings for familiar workouts start creeping higher than usual. Dropping weekly load by 40-60% during a deload while maintaining some training frequency helps you recover without losing fitness.

FREQUENTLY ASKED QUESTIONS

What is session RPE?
Session RPE (Rating of Perceived Exertion) is a subjective measure of how hard your entire training session felt, rated on a scale of 1 to 10. It was developed by Carl Foster as a simple way to quantify training load without heart rate monitors or other equipment.
How do I rate my session RPE?
Wait about 30 minutes after your session, then rate the overall difficulty from 1 (very easy, like a light walk) to 10 (maximal effort, the hardest session you can imagine). A 5 would be moderate effort. Half-point ratings like 7.5 are acceptable for more precision.
What is a good weekly training load?
For most recreational lifters, a weekly training load between 1,000 and 3,000 AU (arbitrary units) with a monotony below 2.0 is considered optimal. Loads above 5,000 AU with high monotony significantly increase overtraining and injury risk.
What does training monotony mean?
Training monotony measures how varied your training loads are across the week. A monotony score above 2.0 indicates very uniform sessions with little variation, which research links to increased illness and overtraining risk. Varying session intensity throughout the week helps keep monotony low.
How is training strain calculated?
Training strain is calculated by multiplying your weekly training load by your training monotony score. It captures the combined effect of high volume and low variation. High strain values indicate greater physiological stress and recovery demands.
How often should I track session RPE?
Track session RPE after every training session for best results. Weekly reviews allow you to spot trends in load, monotony, and strain. Consistent tracking over 4-6 weeks gives you a baseline to manage training progression and deload timing.
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