All-In Gen 2 turns your home into a cold plunge studio—no plumbing, no waiting
The All-In Gen 2 is a fully integrated cold tub with built-in chiller that cools to 37°F, 31% faster than the previous generation while using 50% less energy. It holds 105 gallons, fits people up to 6'9", and includes ozone sanitation plus double filtration. Plug it in, fill with water, and you're plunging daily without the gym membership activation cost.
Observational cohorts and small RCTs show cold water immersion reduces inflammation markers, improves mood and stress resilience, and may enhance recovery after exercise. However, human trials are small (N < 100 typically), lack long-term follow-up, and show inconsistent effects on athletic performance and cardiovascular outcomes. The mechanism is well-established in physiology, but real-world benefit size remains uncertain.
Mechanism
Cold water immersion (typically 50–59°F / 10–15°C for 1–5 minutes) activates the parasympathetic nervous system post-exposure, increases norepinephrine and dopamine signaling, triggers heat-shock protein (HSP) expression, and may enhance brown adipose tissue (BAT) activation and mitochondrial biogenesis. Acute cold stress also modulates immune function and reduces inflammation markers.
“The purpose of this study was to examine the effect of β-hydroxy-β-methylbutyrate-free acid (HMB-FA) and cold-water immersion (CWI) on circulating concentrations of TNF-α and monocyte TNF-α receptor 1 (TNFR1) expression.”
“INTRODUCTION: Physiological and psychological recovery, i.e., the balance between fatigue/stress and recovery and evaluated through heart rate variability (HRV), is essential for the good performance of athletes in all their activities.”
Caveats
Most RCTs are underpowered and short-duration (weeks, not months or years). Cold immersion can raise blood pressure acutely and may pose risk for people with cardiovascular disease or arrhythmia history. Evidence for fat loss, longevity, or sustained cognitive benefit is thin. Adaptation occurs quickly (within 2–4 weeks), so chronic benefit is unclear. No meta-analysis yet synthesizes the scattered literature.
✓
Tried it? Verify this find to help others know it works. Members can verify, free to join.
0 comments
Be the first to comment.
EOD publishes opinions and summaries of research about supplements, services, and protocols. It is not medical advice. Consult a qualified healthcare provider before changing your supplement, exercise, sleep, or medication regimen.
Some outbound links on EOD are affiliate links. If you buy through them we may earn a small commission, at no extra cost to you. It never influences what we publish or how it's ranked. Full disclosure.
