The Claim

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.

Source: Neural determinants of the increase in muscle strength and force steadiness of the untrained limb following a 4 week unilateral training

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
37score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Description
1 study reviewed
In plain English

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.

See the scientific wording

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.

What the research says

1 study

  1. Study: Neural determinants of the increase in muscle strength and force steadiness of the untrained limb following a 4 week unilateral training

    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.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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