You feel the effort in your legs, your grip or the final seconds of a set. Behind that familiar feeling is a much smaller story: cells moving energy to exactly where work is happening.
“Cellular energy” sounds abstract until you connect it to something you do. Push a pedal. Stand up with a weight. Accelerate again. Each action depends on energy becoming available at the right moment.
Meet your cells’ energy currency
ATP, short for adenosine triphosphate, is a molecule cells use to transfer usable energy. When it releases a phosphate group, it becomes ADP. Cells continually recycle that ADP back into ATP so work can continue. [1]
That is where phosphocreatine becomes interesting. Through the creatine kinase system, it can donate a phosphate group to help regenerate ATP. Imagine a reserve close to the action: energy can be made available where demand is rising. This is an analogy for the process, not a literal extra battery. [1]
Where mitochondria come in
Mitochondria are involved in producing ATP. The creatine system helps buffer and transfer energy between where it is produced and where it is used. A 2022 review explores this relationship and its possible relevance in conditions involving mitochondrial dysfunction. [1]
A later review considers future diagnostic and treatment applications, while identifying clinical-validation gaps. That is a promising research direction, rather than evidence that a retail supplement repairs damaged mitochondria or prevents disease. [2]
For everyday reading, keep two ideas separate: how a system works, and what a person actually experiences. Understanding the first helps you ask a better question about the second.
Make the science relevant to your training
Start with a session you know well. Where does it ask you to produce another hard effort? The next set, the next acceleration, the last climb? That is a more useful context for exploring creatine than a vague promise of “more energy”.
You can use this simple reading habit with any supplement claim:
- Name the outcome. Strength, repeated sprint performance and feeling less tired are different questions.
- Find the matching research. Look for people and activities that resemble the context you care about.
- Choose a practical next step. Decide what belongs in your routine and what is still an interesting research idea.
You do not need to memorise the chemistry. Keep the useful part: creatine has a specific role in energy handling, and specific goals make that role easier to understand.
Go from the mechanism to your routine
If strength is your focus, continue with our guide to creatine and strength training. If your sport involves changes of pace, explore surges, sprints and endurance.
For the product itself, QLEOS Optimized Creatine brings the formula and serving information together in one place. Start with the label, understand what you are choosing and make it part of a routine you can repeat.
Sources & further reading
- Role of Creatine Supplementation in Conditions Involving Mitochondrial Dysfunction: A Narrative Review. Marshall et al. Nutrients, 2022. doi:10.3390/nu14030529.
- Creatine as a mitochondrial theranostic in predictive, preventive, and personalized medicine. Ostojic and Rátgéber. EPMA Journal, 2025. Review. doi:10.1007/s13167-025-00420-9.
From the QLEOS Journal. We make supplements and explain the research behind the conversation. The studies cited here did not test the finished QLEOS product. This is general information, not personalised medical advice.
