CRISPR and genetic engineering possibilities in sport: ethical boundaries, scientific achievements and future perspectives

CRISPR-Cas9 technology, discovered in 2012, allows precise editing of genes. In sport, this raises revolutionary possibilities — the theoretical ability to modify the MSTN (myostatin) gene for muscle growth, the EPO gene for endurance, or the ACTN3 “speed gene”. However, ethical questions and WADA prohibitions make this field highly controversial.
| Gene | Function | Modification Effect | Status |
|---|---|---|---|
| MSTN (Myostatin) | Limits muscle growth | When switched off — huge muscle mass | Banned by WADA |
| EPO (Erythropoietin) | Red blood cell production | When activated — greater endurance | Banned by WADA |
| ACTN3 (“Speed Gene”) | Fast-twitch fibers | When activated — greater explosiveness | Natural variation |
| PPARGC1A | Mitochondrial biogenesis | When activated — better endurance | Under investigation |
| ACE (Angiotensin-Converting Enzyme) | Blood pressure, endurance | When modified — better VO2max | Under investigation |
Where to draw the line between gene therapy for medical purposes (treatment of muscular dystrophy) and sports enhancement? This line is increasingly blurring.
Is it ethical to edit the genes of athletes' children so that they have a genetic advantage? In China, CRISPR-edited babies have already been born (2018 scandal).
If some athletes have genetically modified muscles and others do not, are competitions still fair? Will separate categories be needed?
Gene editing costs tens of thousands of euros. Will this not create a “genetic aristocracy” in sport, where the richest win?
WADA (World Anti-Doping Agency) has already included gene editing in the list of prohibited methods. But detecting gene editing is almost impossible — there are no foreign substances in the blood, only altered DNA of the body itself.
These innovations are based on decades of scientific research:
Technologies are only a tool. Gene Editing in Sport can provide incredible advantages, however the basic principles of sport do not change: consistent work, proper nutrition, rest and psychological preparation remain the most important. Innovations help optimise these processes rather than replace them.