Weekly Net Stimulus Calculator
Calculate your weekly net training stimulus to optimize muscle hypertrophy. Based on dose-response research and maintenance volume studies.
Credit: @youssef.elezzi — WNS Calculator | Research by Chris Beardsley (Weekly Net Stimulus)
Ready to Calculate
Fill out the form on the left and click "Calculate" to see your weekly net stimulus results and detailed breakdown.
Weekly Net Stimulus Guide
Weekly Net Stimulus calculates your muscle growth potential by comparing the hypertrophy stimulus from training against muscle atrophy during rest periods. Positive values indicate growth potential.
What Is Weekly Net Stimulus?
Weekly Net Stimulus (WNS) is a training volume metric that estimates your net muscle growth potential for a given week. It compares the hypertrophy stimulus generated by your workouts against the stimulus lost to atrophy during rest periods between sessions, based on dose-response and maintenance-volume research.
How It Works
Workout Stimulus: Each set generates hypertrophy stimulus (based on research data). More sets = more stimulus, but with diminishing returns.
Atrophy Effect: Muscles lose stimulus during recovery periods. Longer gaps between workouts = more atrophy.
Net Result: Total weekly stimulus minus atrophy effect. Higher frequency typically beats lower frequency for the same weekly volume.
Key Takeaways
• Train each muscle 2-3x per week for optimal results
• Schoenfeld dataset provides conservative, reliable estimates
• 36-48 hour stimulus duration is most research-supported
• Split high weekly volumes across more frequent sessions
How to Interpret Your Score
Positive WNS: Your training frequency and volume are generating more stimulus than you're losing to atrophy between sessions — a good sign for continued growth.
Negative WNS: Too much time is passing between sessions relative to your volume, so atrophy is outweighing new stimulus. Try training the muscle group more frequently or reducing stimulus duration.
Based on research by Chris Beardsley. Visit his Patreon for detailed methodology and latest research.
Want to see how training volume drives results? Read how tracking your lifts drives muscle growth.
Frequently Asked Questions
What is Weekly Net Stimulus?
Weekly Net Stimulus (WNS) estimates your net muscle growth potential by comparing the hypertrophy stimulus from your training against the stimulus lost to atrophy between sessions.
What's a good Weekly Net Stimulus score?
Any positive value indicates growth potential. Higher training frequency for the same weekly volume generally produces a higher net stimulus by reducing atrophy time between sessions.
How is WNS different from just tracking weekly sets?
Set counting ignores how long the muscle-building effect of a workout lasts. WNS accounts for the timing between sessions, so two identical weekly volumes with different frequencies can produce different results.
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