The Claim

After training one arm, the other arm gets stronger because its motor neurons become easier to activate and receive more synchronized signals from the brain.

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

After training one arm, the other arm gets stronger because its motor neurons become easier to activate and receive more synchronized signals from the brain.

See the scientific wording

Greater shared synaptic input (CSI) and lower motor unit recruitment thresholds (MURTs) are associated with increased maximal voluntary force in the untrained limb following 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

    Training one arm made the other arm stronger too—even though it wasn’t exercised—because the brain sent more coordinated signals to the muscles and made them easier to activate.

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

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