What happens to muscles when women do hard arm exercises at long lengths?
The effects of concentric and eccentric exercise performed at long muscle length on muscle damage
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
No significant difference between contraction types overall, despite clear functional and structural differences at 24 hours.
Even though eccentric exercise caused more strength loss and echo changes, the statistical analysis showed no significant main effect or interaction of exercise type—suggesting the overall pattern over time was similar, which contradicts expectations from prior literature.
Practical Takeaways
Be extra cautious with eccentric (lowering) movements when trying new arm exercises, especially at long muscle lengths.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
No significant difference between contraction types overall, despite clear functional and structural differences at 24 hours.
Even though eccentric exercise caused more strength loss and echo changes, the statistical analysis showed no significant main effect or interaction of exercise type—suggesting the overall pattern over time was similar, which contradicts expectations from prior literature.
Practical Takeaways
Be extra cautious with eccentric (lowering) movements when trying new arm exercises, especially at long muscle lengths.
Publication
Journal
Journal of Sports Sciences
Year
2025
Authors
Anastasia V Karyofyllidou, G. Terzis, D. Mandalidis, Nikos V. Margaritelis, V. Paschalis
Related Content
Claims (4)
When women do certain types of arm exercises that involve stretching the muscle while contracting it, they tend to feel more soreness and their muscles get thicker — probably because of inflammation and fluid buildup.
Doing certain types of hard arm exercises that lengthen the muscle while it's working can make your arms weaker and less flexible within a day.
Doing a new type of strength exercise that stretches your biceps a lot can cause temporary muscle damage and soreness in women, and these effects can last up to four days.
Doing super-slow, lengthening muscle exercises (like lowering a heavy weight) causes more muscle damage than shortening ones, and you can see it on an ultrasound of your arm muscles.