The Claim
In 6-month-old female mice with constitutive myostatin inactivation, specific maximal force is not reduced in the Grobet model, indicating a sex- and strain-dependent effect on muscle quality.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Female mice aged six months with genetically disabled myostatin show no decline in maximal muscle force per unit of muscle mass when tested in the Grobet model, and this outcome differs based on sex and genetic strain.
See the scientific wording
In 6-month-old female mice with constitutive myostatin inactivation, specific maximal force is not reduced in the Grobet model, suggesting a sex- and strain-dependent effect on muscle quality.
When the myostatin gene is permanently turned off, muscles grow much larger, but usually become weaker per gram of tissue because the muscle fibers get too big without adding more contractile parts. In female mice of the Grobet strain, the muscle fibers grow larger but still keep their normal density of contractile proteins and proper structure, so they stay strong per gram of tissue.
What the research says
1 studyIn female mice that can't make myostatin, one strain (Grobet) keeps strong muscles per gram of tissue, while others don't — showing that genes and sex matter for how losing myostatin affects muscle strength.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.