The Claim
In healthy, trained young adults undergoing 12 weeks of resistance training, creatine supplementation (administered daily or on training days only) was associated with a significant increase in left leg isokinetic knee extension torque, with no significant change in right leg isokinetic knee extension torque or isometric mid-thigh pull strength.
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.
In healthy, trained young adults doing 12 weeks of resistance training, taking creatine daily or only on training days led to increased strength in the left leg during knee extension movements, but did not change strength in the right leg or during a whole-body pull test.
See the scientific wording
In healthy, trained young adults performing 12 weeks of resistance training, creatine supplementation (daily or training-day-only) was associated with a significant increase in left leg isokinetic knee extension torque, but no change in right leg torque or isometric mid-thigh pull strength.
Creatine increases the amount of energy storage in muscle cells, allowing the left leg to produce more force quickly during repeated knee extensions, but only if that leg was trained more or had higher baseline demand, and this effect doesn't extend to other muscles or the other leg.
What the research says
1 studyIn this small study, people who took creatine every day got stronger in one leg’s knee movement, but not in the other leg or when pulling with their whole body—just like the claim says.
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.