This test measures your aerobic ceiling (VO₂max) and ventilatory thresholds, then builds HR/pace/power zones from your own breath-by-breath data—not from a formula. From that ceiling we can also give performance potential ranges: e.g., what your cycling power at VO₂max should look like, or what run/swim paces typically map to your value if economy is “normal.” If your actual training paces or powers sit well below those ranges, that’s a red flag for economy, durability, or technique—areas we can quantify in the Pro Full-Stack assessment. Retesting every 8–12 weeks tells you if the engine is growing, if thresholds are shifting, and whether the last training block actually worked. On the health side, VO₂max (cardiorespiratory fitness) is one of the strongest objective predictors of cardiovascular and all-cause mortality risk. Tracking it over time is a simple, hard-to-fake way to verify that your training and lifestyle are protecting long-term healthspan—not just producing short-term race splits. VO₂max isn’t everything (economy, strength, and durability matter), but it’s the top-end limiter; if you don’t know it, you’re programming in the dark.

Most real races aren’t steady: HYROX, CrossFit, crits, and even Olympic-distance (or hard long-course) triathlon are decided by who can surge, recover, and surge again. PRP tells you—objectively—how hard you can punch, how many times you can do it, and how fast you’re dangerous again. No guessing, no “I think I’m ready”: you get clear numbers on your peak burst, the drop-off rep to rep, and the exact recovery time you need to hit back at near-full power. That unlocks three things: accurate pacing of surges (stop blowing up on the penultimate effort), clean identification of your limiter (engine size vs. recovery speed), and training that actually targets the bottleneck (not just “more HIIT”). Retest and you’ll know if you’re 3–5% more resilient—not just hope you are.

Brutally fast, brutally honest. In three blind, all-out minutes you get what usually takes multiple tests: Critical Power (your sustainable aerobic ceiling), W′ (how many “matches” you can burn above it), and a VO₂max estimate. No pacing, no sandbagging—the DARK test removes the athlete’s (and coach’s) bias and gives you hard numbers, now. Perfect when you’re time-crunched, mid-season, or want a clean pre/ post training-block comparison. Direct implications for how you train and race. CP sets your endurance zones and target powers; W′ tells you how deep you can surge and how to structure intervals and race moves; VO₂max frames your ceiling. Repeating DARK every 6–12 weeks shows whether you’re raising sustainable power or just spending W′ faster. It’s not gentle, and it’s not for anyone who shouldn’t go maximal—but if you’re chasing performance, it’s the quickest way to align your training prescriptions with reality.

Built for triathletes, runners, cyclists, and swimmers, this acyclic, repeat-step protocol synchronizes breath-by-breath VO₂, blood lactate, SmO₂/tHb, and core temperature, then layers economy/efficiency curves at multiple intensities. You don’t just get zones and ceilings—you see exactly where performance degrades and why: central delivery, peripheral O₂ use, glycolytic spill, thermoregulation, or plain movement inefficiency. Because the test uses repeated stages (not a single linear ramp), the signal-to-noise is high and your thresholds, FatMax, and economy shifts are pinned with much tighter confidence. The output is a ranked limiter map + training roadmap: which lever to pull first, by how much, and with what kind of work (e.g., VO₂max block vs. economy work vs. lowering VLamax vs. heat adaptation). Retest and you’ll know if you actually moved the limiter—no guesswork. If all you want are “good-enough” zones, this is overkill. If you’re chasing podiums/qualifiers or feel stuck despite training hard, this is the most efficient way to stop wasting blocks on the wrong target.

Stop guessing your calories and macros. We measure your Resting Metabolic Rate with indirect calorimetry, then translate it into actionable daily and training-day fuel targets, plus simple meal templates matched to your preferences. You leave knowing exactly how to eat to recover, perform, and manage body composition—without crashing your hormones or digging an energy hole. Just as important, we use your measured RMR, symptoms, training load, and body-comp trends to screen for Low Energy Availability / RED-S early. A suppressed RMR, stalled progress, recurrent niggles, or hormonal flags show up before your season (or health) implodes. Re-test every 8–12 weeks and you’ll see whether you fixed the gap or are still under-fuelling.

Stop paying four figures for single-digit gains you hope are real. In one afternoon we measure your actual CdA on real roads, iterate 6–10 position/kit tweaks, and show—run by run—what really cuts drag. Typical athletes walk away 10–50 W “more aero,” which is worth ~10–20 minutes over a 180 km Ironman bike leg—at a fraction of the cost of a $3,000 disc wheel or a $1,000 wind-tunnel block. It’s fast, empirical, and repeatable. You get live CdA + power feedback, a ranked list of the winning changes (helmet, stack, bottles, suit, shoes, etc.), and clear guidance on what to keep, what to bin, and when to retest (new kit, new fit, new bike). Caveats up front: results depend on protocol discipline (calm day, accurate power meter, stable posture). We control for that with out-and-back runs, environmental checks, and validated sensors (Gibli + PM).

In two steps we try and quantify. A quick remote or trackside review cleans up the big rocks—overstride, hip drop, cadence, foot strike—and gives you immediate, drill-level fixes to cut impact and lower injury risk. The Pro Biomech & Metabolic session then layers HD video and motion sensors with VO₂ and SmO₂ to map your running economy (cost of a given pace) and running effectiveness (how much of your power actually moves you forward), and left–right imbalances. You walk out with corrective warm up drills, economy/efficiency curves, and a ranked limiter list. Most runners feel smoother within days, but measurable efficiency gains and risk reduction take 8–12 weeks of consistent work—so we specify exactly what to do and when to retest on the same protocol to prove it worked. If you just want a few cues, the remote/trackside options are enough. If you want a full roadmap—from mechanics to metabolism—book the Pro and stop guessing where your seconds (and tendons) are being lost.

Pick the dose you need: a Remote Quick-Fix (2 clips, 48-h turnaround) to kill the big leaks fast; a Poolside Tune-Up (30 min, above/below water filming) to correct on the spot; or a Pro-Level Motion Analysis (90 min, HD video + force / timing sensors) to quantify propulsion, drag, kick timing, and symmetry. Typical gains: novices ~20–30 s/100 m (≈13–19 min over 3.8 km), competitive swimmers ~5–10 s/100 m (≈3–6 min), elites still claw back ~3–5 s/100 m—the difference between packs and podiums. ROI you can plan around. Most of the clock savings land over 8–12 weeks as you ingrain the prescribed drills and pacing cues; we give you a retest cadence so you can prove it. Cost per minute saved routinely beats new tech purchases (see coach notes), and you leave knowing exactly what to fix first: catch timing, path, propulsion vs. drag balance, kick cadence, or breathing-induced asymmetry. Film, fix, verify—then go race.