How muscles get tired when you lift weights until you can't do more
Neuromuscular Fatigue During Heavy Resistance Drop Set Training to Failure.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Some muscles showed no increase in normalized EMG despite training to failure
It contradicts the common assumption that all prime movers will show rising muscle activity when pushed to exhaustion—yet vastus medialis and semitendinosus did not follow this pattern.
Practical Takeaways
Use drop sets to failure occasionally to maximize acute muscle fatigue and stimulate adaptation, especially as a beginner.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Some muscles showed no increase in normalized EMG despite training to failure
It contradicts the common assumption that all prime movers will show rising muscle activity when pushed to exhaustion—yet vastus medialis and semitendinosus did not follow this pattern.
Practical Takeaways
Use drop sets to failure occasionally to maximize acute muscle fatigue and stimulate adaptation, especially as a beginner.
Publication
Journal
Journal of strength and conditioning research
Year
2026
Authors
M. D. Jakobsen, E. Sundstrup, L. L. Andersen
Related Content
Claims (4)
Going all the way to muscle burnout during weight training tires out your brain and nerves more than stopping just before total exhaustion.
When beginners do intense leg press workouts to the point of exhaustion, their muscles get increasingly tired, and this shows up as changes in muscle activity signals — some muscles work harder, others change how they fire, and these shifts tell us fatigue is building up.
Doing intense drop-set workouts until your legs can't do another rep causes clear signs of muscle tiredness in beginners, based on electrical signals from the muscles — making it a solid way to push muscles hard during a workout.
When beginners do super intense weight workouts where they keep going until they can't anymore, their form gets worse as each set goes on — but that same level of worsening happens every set, like clockwork.