When your brain sends more coordinated signals to your muscles and less random noise, your movements become smoother and more controlled—even in muscles you didn’t train.
Scientific Claim
Increased relative strength of shared synaptic input to motoneurons and reduced variability of this input are associated with improved force steadiness in both trained and untrained limbs after unilateral resistance training.
Original Statement
“In both limbs, lower CovF was strongly associated with reduced CSI-V (R² > 0.70, P < 0.01).”
Evidence Quality Assessment
Claim Status
overstated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The abstract uses 'associated with' but the claim phrasing implies a direct mechanistic role. The study design cannot confirm causation; the verb 'are associated with' is appropriate but the claim structure implies mechanism without proof.
Evidence from Studies
Supporting (1)
After training one arm, the other arm also got better at holding steady force—even though it wasn’t trained—because the brain sent more coordinated signals and fewer random ones to the muscles.