Why do muscles get stronger faster at first?
Aging, resistance training, and motor unit discharge behavior.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Both young and older adults show transient increases in motor unit discharge rates during repeated strength testing.
It contradicts the assumption that aging permanently reduces neural adaptability—showing older adults retain rapid neural plasticity for strength.
Practical Takeaways
If you're new to lifting, don’t be discouraged if you don’t see muscle growth yet—your strength gains are real and driven by your nervous system improving.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Both young and older adults show transient increases in motor unit discharge rates during repeated strength testing.
It contradicts the assumption that aging permanently reduces neural adaptability—showing older adults retain rapid neural plasticity for strength.
Practical Takeaways
If you're new to lifting, don’t be discouraged if you don’t see muscle growth yet—your strength gains are real and driven by your nervous system improving.
Publication
Journal
Canadian journal of applied physiology = Revue canadienne de physiologie appliquee
Year
2005
Authors
G. Kamen
Related Content
Claims (4)
When you first start lifting weights, you get stronger not because your muscles grow bigger right away, but because your brain gets better at telling your muscles when and how to contract.
When people of any age do strength exercises multiple times in a row, their muscles fire more intensely for a short while—and that’s when they get a quick boost in strength.
As people get older, their muscles don't send signals as quickly when they try to move, which might be why they lose strength over time.
When you first start lifting weights, your muscles get stronger not just because they’re growing, but because your brain and nerves get better at telling your muscles when and how hard to contract.