"The Fastest I’ve Ever Been" — Dr. Drew Denson’s LiveO2 Performance Story
A physician-athlete’s candid assessment: after decades of training, LiveO2 produced performance gains he couldn’t achieve any other way.
Who This Is For
This is for athletes and high performers who are skeptical of hype and want to hear from someone with the medical background to evaluate real results. Dr. Denson’s story is for those who demand evidence before adoption.
- Skeptical athletes who want medical credibility behind performance claims
- Masters athletes looking to set new personal bests in their 40s and beyond
- Physicians and clinicians curious about applied oxygen physiology
- Competitive athletes who’ve tried everything and are looking for what’s next
- Coaches seeking advanced performance tools backed by medical experience
The Challenge Elite Athletes Face
After decades of training and competition, most athletes accept that their fastest days are behind them. The physiological story they’ve been told is linear decline — progressive loss of VO2 max, slower recovery, diminishing explosive power. This is true without intervention. But the premise assumes they’ve already optimized cellular oxygen delivery. Most haven’t.
Speed, power, and endurance all depend on the ability to deliver oxygen to working muscles faster than it’s consumed, and to clear metabolic waste before it accumulates to performance-limiting levels. When this system is optimized — truly optimized, at the cellular and capillary level — athletes of any age can achieve performance they’ve never experienced before.
Why Oxygen Is the Missing Link
LiveO2 Adaptive Contrast provides what decades of training can’t replicate: direct cardiovascular training for oxygen delivery efficiency. The alternation between oxygen-rich and oxygen-reduced breathing during exercise forces adaptation in the capillary network and the oxygen transport cascade — the same systems that determine how fast you can go and how long you can sustain it.
When Dr. Denson — a physician who understands the mechanism — reports being the fastest he’s ever been, it’s not marketing language. It’s a medical professional observing that their cellular oxygen delivery has been meaningfully improved.
What Athletes Report
Athletes who use LiveO2 to optimize oxygen delivery report speed and performance outcomes consistent with Dr. Denson’s experience:
- Personal bests in speed-dependent metrics — split times, power output, race times
- Reduced time to maximal output at the start of training sessions
- Sustained top-end speed later in races or competitions when competitors fade
- Better tolerance for high-intensity intervals with shorter recovery between sets
- Subjective and measurable sense of ‘more in the tank’ during maximal efforts
Key Takeaways
- Peak performance is possible at any age when cellular oxygen delivery is properly optimized
- Speed gains from LiveO2 reflect real cardiovascular adaptation, not placebo
- Physician-athletes provide uniquely credible performance testimonials
- The ‘fastest I’ve ever been’ outcome is achievable when you address the oxygen delivery system directly
- Oxygen delivery efficiency — not training volume — is often the limiting factor for mature athletes
- LiveO2 provides a form of cardiovascular training that traditional exercise cannot replicate
Ready to train at this level?
If you’ve been told your fastest days are behind you, the cellular evidence might say otherwise. Explore what LiveO2 can unlock in your physiology.
Explore LiveO2 Systems Talk to an ExpertFrequently Asked Questions
Most athletes optimize training volume, nutrition, and technique — but never directly address cellular oxygen delivery efficiency. The capillary network that delivers oxygen to working muscles can be further developed even in highly trained athletes. LiveO2 Adaptive Contrast provides a direct stimulus for this adaptation, enabling performance improvements that conventional training alone can’t produce.
The combination of medical analytical rigor and athletic performance monitoring that physician-athletes bring to their LiveO2 evaluation consistently produces the same finding: measurable, reproducible performance improvement that they attribute to improved cellular oxygen delivery. This pattern repeats across multiple physician-athletes who have used and evaluated the system.
Yes. The speed gains that LiveO2 enables are measurable — in split times, power output metrics, and race results — not just subjective. They reflect real physiological adaptation in the oxygen delivery system, which can improve at any age when given the right stimulus.
Most athletes notice improved energy levels and recovery speed within the first 1–2 weeks. Measurable speed improvements — new personal bests or better split times — typically emerge after 3–6 weeks of consistent use, as cardiovascular adaptations in the oxygen delivery system develop.
LiveO2 is designed to complement existing training programs, not replace them. Most athlete users maintain their standard sport-specific training and add LiveO2 sessions post-workout for recovery, or use it as a separate cardiovascular and oxygen-delivery optimization session. Dr. Denson’s approach combines LiveO2 with his existing training structure.
Speed depends on the rate of oxygen delivery to fast-twitch muscle fibers and the speed of metabolic waste clearance. Both of these are directly improved by LiveO2 Adaptive Contrast. Whether your sport demands sprinting speed, cycling power, swimming pace, or any other speed-dependent output, the underlying physiology responds to LiveO2 optimization.