Every intervention Outliyr has scored for vo2 max, ranked by its BioHarmony score for this use case rather than its overall rating. The number beside each name is how well that one thing works for vo2 max; the tier beside it is what it is worth once safety, cost and effort are counted across everything else.
27 of 86 evaluated interventions score 3.0+ out of 10 for vo2 max · 2 comparisons
The Norwegian 4x4 approach consists of four minutes of near-maximal effort repeated four times with brief recovery, a pattern that consistently outperforms moderate continuous training in aerobic capacity. Meta-analyses of high-intensity interval…
Short all-out efforts raise maximal oxygen uptake nearly as well as far longer endurance training. Gist 2014 pooled 16 trials and found a weighted effect size of 0.63 for VO2max, with gains…
Vabishchevich 2026 supports the strongest part of the claim. The existing rationale points to this narrower claim: this verified source found each 1-MET higher maximal aerobic capacity associated with 13% lower all-cause…
Zhang 2025 found endurance-athlete BFR improved aerobic capacity and performance versus similar training without BFR. The score stays bounded because Blood-Flow Restriction Training evidence for vo2 max can depend on load management,…
Tirzepatide may improve functional exercise capacity in obesity related HFpEF. Reduced body mass can improve relative aerobic performance. It does not directly train cardiorespiratory fitness. Lean mass loss can blunt performance. Score…
Rucking is a moderate continuous aerobic stimulus, and that style of training raises VO2 max by roughly 3.5 to 4.9 mL/kg/min on average across the literature (Crowley 2022), with high-intensity intervals adding…
Relative oxygen uptake can improve when body weight falls, while absolute aerobic power may decline if training and lean mass decline. Wilding 2021 supports the body-mass side of that equation. The drug…
The evidence does not support a meaningful VO2-max boost from Whole-Body Vibration, with meta-analyses of athlete trials showing no significant change in aerobic capacity (Peng et al. 2024). The current tier of…
Demidenko 2021 is the cleanest verified anchor for this report. The existing rationale points to this narrower claim: No direct VO2 max data. Keep neutral until cardiorespiratory trials exist. That does not…
The evidence for SLU-PP-332 improving vo2-max scores is limited, with no human cardiopulmonary data reported in the study Billon et al. 2023. SLU-PP-332 showed enhanced treadmill endurance in mice, but the endpoint…
Hadanny 2022 supports physical performance gains in middle-aged athletes after hard-chamber protocols. VO2 max specifically is not established enough to score high across users. Healthy endurance athletes should not expect HBOT to…
Resistance training produces only modest improvements in maximal aerobic capacity, since VO2 max is primarily driven by cardiorespiratory rather than musculoskeletal adaptation. Circuit-style or high-volume resistance work can nudge it upward, especially…
No direct VO2 max evidence was verified. EAAs are not a primary aerobic-capacity intervention.
No direct VO2max trial was identified. Tongkat Ali may support training quality in specific responders, but it is not an aerobic-capacity intervention.
VO2max may improve indirectly if anemia, motivation, muscle mass, or training consistency improves, but direct TRT effects on aerobic capacity are not a primary evidence strength. Cardiometabolic basics still dominate.
INSUFFICIENT_EVIDENCE for VO2 max improvement; exercise-stacking evidence currently argues against an upside assumption.
Plasma volume and hydration status support cardiac output during endurance work; the effect is maintenance under stress, not a direct VO2 max builder.
Fat-oxidation and exercise-efficiency signals may help endurance, but VO2 max itself is not well established as a primary astaxanthin endpoint.
VO2-relevant exercise-capacity gains appear in heart-failure patients, but healthy-athlete VO2max trials are mixed, so this is conditional on a compromised baseline.
Konopka 2019 reported smaller aerobic-fitness gains with metformin during 12 weeks of training in older adults. This is one of the clearest negative biohacker-relevant signals.
Davis 2010 reported VO2max gains in trained subjects on quercetin. Later RCTs in athletes were mixed, with Scholten 2013 and Bigelman 2010 both null on performance. The Kressler 2011 meta-analysis showed roughly…
No evidence exogenous ketones raise VO2 max. The performance meta-analysis (Brooks 2022) found no aerobic-capacity benefit, and one trial showed impairment.
The single clean single-ingredient RCT (Chen 2010) found no VO2 max change; the positive VO2 max result (Hirsch 2017) was a blend, so VO2 max specifically is not established for cordyceps.
WB-EMS has high perceived intensity but does not reliably deliver the sustained aerobic workload needed to raise VO2max. It should complement, not replace, aerobic conditioning.
VO2max evidence remains inconsistent and endpoint-fragile. Omega-3 is not a dependable aerobic capacity intervention.
Aerobic-capacity gains in mice imply an oxygen-uptake benefit, but no VO2 max was measured in any species and no human data exists (Billon et al. 2026).
Nothing matches those filters.
Monthly out-of-pocket cost at the most accessible legitimate channel, at the dose the score was given for. 10 of 27 are not priced yet; those cells are left blank rather than guessed.
| Intervention | Monthly cost | At dose | How you get it |
|---|---|---|---|
| Norwegian 4×4 | Not priced yet | Over the counter | |
| Sprinting (Sprint Interval Training) | Not priced yet | ||
| Zone 2 Cardio | Not priced yet | Over the counter | |
| Blood-Flow Restriction Training | Not priced yet | ||
| Tirzepatide | $299–$449 | 2.5 to 5 to 7.5 to 10 to 12.5 to 15 mg | Prescription |
| Rucking (Weighted Walking) | Not priced yet | ||
| Semaglutide | $199–$349 | 0.25 mg weeks 1 to 4, 0.5 mg weeks 5 to 8, 1.0 mg weeks 9 to 12, 1.7 mg weeks 13 to 16, 2.4 mg week 17 onward | Prescription |
| Whole-Body Vibration | $50–$100 | 30 Hz, roughly 0.3g, 10-20 min standing | Over the counter |
| Ca-AKG (Calcium Alpha-Ketoglutarate) | $15–$30 | 1 g/day generic Ca-AKG oral | Over the counter |
| SLU-PP-332 | $30–$80 | 3-5 mg/day oral | Research use only |
| Hyperbaric Oxygen Therapy | $3,000–$6,000 | 2.0 ATA for 90 minutes with air breaks | In clinic |
| Strength / Resistance Training | $60 | 2 to 4 sessions/week | Over the counter |
| Essential Amino Acids | Not priced yet | ||
| Glycine | $2–$3 | 3 g oral glycine | Over the counter |
| Tongkat Ali | $20–$40 | 200 mg/day Physta standardized extract | Over the counter |
| TRT (Testosterone Replacement Therapy) | $50–$300 | Clinician-selected formulation at the lowest dose likely to restore physiologic testosterone | Prescription |
| Rapamycin | $15–$50 | 3 mg | Prescription |
| Electrolytes | Not priced yet | ||
| Astaxanthin | Not priced yet | ||
| Coenzyme Q10 (CoQ10 / Ubiquinol) | $15–$40 | 100-200 mg/day | Over the counter |
| Metformin | $4–$30 | 500 mg with dinner for 1 week, then 500 mg twice daily for 1 week, then increase by 500 mg/week toward 1000 mg twice daily as tolerated | Prescription |
| Quercetin | $20–$50 | 200 mg/day | Over the counter |
| Exogenous Ketones | $38–$300 | Ester 10 to 25 g BHB | Over the counter |
| Adaptogenic Mushrooms (Reishi, Cordyceps, Chaga) | $15–$40 | 1.5 to 1.8 g/day standardized extract | Over the counter |
| Full-Body EMS | Not priced yet | ||
| Omega-3 | $20–$40 | 1-2 g/day combined EPA+DHA | Over the counter |
| SLU-PP-915 | Not priced yet |
Head-to-head reports and category rankings that name a winner on this use case.
Metformin scores 6.5–7.0/10 and rapamycin 6.5–7.0/10, which settles nothing. Rapamycin owns the aging-biology rows: longevity 8.0/10, autophagy 8.5/10, senescence 7.8/10, plus replicated mouse lifespan data. Metformin owns everyday…
Norwegian 4x4 scores 8.0–8.5/10 and Zone 2 cardio 8.0–8.5/10, so the 0.2 gap decides nothing. Your weekly hours decide it. Pick 4x4 when you have under two hours…
Norwegian 4×4, at 9.0–9.5 out of 10 for vo2 max. The Norwegian 4x4 approach consists of four minutes of near-maximal effort repeated four times with brief recovery, a pattern that consistently outperforms moderate continuous training in aerobic capacity.
Of the top-scoring options, Glycine is the least expensive at about $2 a month, scoring 4.5–5.0 out of 10 for vo2 max.
27 of the 86 interventions evaluated for vo2 max score 3.0 out of 10 or better, which is the cut-off for appearing on this page.
