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Fast-twitch muscle fiber protein. R577X sprint gene.
| Genotipo | Impatto | Cosa significa |
|---|---|---|
| CC (Normale) | Normale | RR genotype, two functional copies of alpha-actinin-3, associated with a power/sprint orientation and typically efficient muscle recovery. No specific dietary impact; adequate protein supports muscle maintenance. |
| CT (Portatore) | Impatto basso | R/X heterozygote, intermediate ACTN3 expression. Balanced profile : capable of both power and endurance activities. No specific dietary impact, but adequate protein supports muscle maintenance. |
| TT (Variante) | Moderato | XX genotype, no functional alpha-actinin-3. Associated with a relative endurance orientation rather than power/sprint, and potentially slower muscle recovery. Prioritise adequate protein intake and sufficient recovery between training sessions. |
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