Dr. Andy Galpin: On Recovery Modalities, Performance Anchors and Hidden Stressors | TUH #211

Galpin has been using cold plunges with athletes for over 15 years, experimenting with temperatures from floating ice chunks to 50-60°F and durations from 3 to 20 minutes. He emphasizes that cold plunging is not a recovery tool in the traditional sense — in fact, it's 'one of the worst recovery practices' if misapplied. The primary appropriate use is morning wakefulness. He often takes cold plunges away from clients when they are using them post-exercise during hypertrophy phases, or when they cause sleep disturbances. The key is matching the modality to the specific problem: if you need to feel alert and energized, cold plunging works; if you need tissue repair and muscle growth, it's counterproductive. He also notes that the popular belief that cold plunging aids fat loss via cortisol is a misunderstanding of the mechanism.

Galpin distinguishes between sauna for longevity (cardiovascular health, all-cause mortality reduction) and sauna for performance. For longevity, the primary mechanism is the cardiovascular stress that mimics exercise, but he stresses that sauna is not an equal substitute — it's a supplement when exercise isn't possible (travel, poor gym access, excessive soreness). For performance, post-exercise sauna is an emerging area with positive studies on muscle growth and endurance. He predicts more positive data will emerge because the molecular rationale is sound. He also notes that hot water immersion may be superior to dry sauna because water is 29 times more thermogenic than air and provides compression. This makes it a dual-action recovery tool: thermal stress plus mechanical compression. He uses sauna frequently with athletes and personally, but always within a hierarchy where exercise comes first.

Galpin describes a common clinical scenario: a woman doing Orange Theory 5 days a week, fasted, with only black coffee, not losing weight despite extreme discipline. This often coincides with a very narrow feeding window (e.g., 16:8 intermittent fasting) that works for her husband but wrecks her hormones. The problem is RED-S — Relative Energy Deficiency in Sport — a condition where low energy availability tanks every health metric. Galpin's approach is to first stabilize the body with a refeed, because 'fat loss is far easier when you're healthy.' He offers two levers: increase calories modestly (refeed) or reduce high-intensity exercise volume. The refeed is typically 10-15% more calories, mostly carbs, for 7-21 days. This often restores sleep, mood, and hormonal profiles, after which fat loss can resume more effectively. He emphasizes that you cannot out-supplement this problem; the body needs an allostatic reprieve.

Galpin has studied and recommended creatine for decades. He highlights a shift in the market: creatine used to come from a single manufacturer, but now quality varies widely. Creapure is a specific form made without formaldehyde and with verified purity. He cites a study from his group showing 10-40% adulteration in supplements, including creatine gummies that contained no creatine. Dosing: the old 5 g/day was based on a 70 kg person; for larger athletes (200+ kg), they've used 10-15 g for years without issues. Recent research by Darren Candow gave postmenopausal women 20+ g/day for over 2 years with no adverse effects. A study on cognitive function after sleep deprivation showed that 15-20 g improved performance that day. Galpin is cautiously optimistic but notes no downside to trying. He personally uses Momentous but emphasizes that any Creapure-containing brand with transparent testing is fine.

Galpin uses sleep as a detailed example. If someone wants more REM sleep, he first asks: how are you measuring it? Most consumer devices are inaccurate for sleep staging, so you can't play the REM game without a valid tool. Second, what should your REM be? The answer depends on age, sex, travel, cognitive load, and goals. Many people chase a higher number because their app shows yellow or their friend's number is bigger, which is nonsense. Third, only after accurate measurement and personalized interpretation do you intervene — and you try one thing at a time (e.g., cold plunge, antioxidant-rich foods) to see if it moves the needle. He has used over 500 different modalities to improve REM sleep in hundreds of people, but the key is the process, not the specific hack. This framework applies to HRV, blood markers, and any other metric.

Galpin frames his change of mind as a spectrum: Gary Brecka is an early adopter who will try something with minimal evidence, while Galpin historically required robust human data before recommending anything to clients. Red light therapy now sits in a middle ground where he won't discourage personal experimentation but won't prescribe it until higher-priority recovery anchors (sleep, nutrition, stress management) are optimized. He emphasizes that the question is always 'better than what?' — red light may work, but we lack direct comparisons to other modalities. He also notes that full-body panels likely have a more pronounced systemic effect than small localized devices, though no direct data confirms this. The key takeaway: if someone has their fundamentals dialed in, tinkering with red light is fine, but it should never replace sleep or exercise.

Galpin introduces the concept of 'performance anchors' — the single biggest factor limiting recovery. This could be excessive training, poor nutrition, visible stressors (like alcohol), or 'hidden stressors' that add to allostatic load without the person realizing it. Hidden stressors are particularly insidious because they fly under the radar. The goal is to identify that anchor through investigation and then apply one precise intervention. He warns that adding 4-6 new things at once or switching modalities monthly ('biohacking hopping') leaves the physiology confused, never settling into a homeostatic adaptation. The body needs consistency to understand the stress and adapt. His guarantee: fewer interventions, less frequently, will yield better results. This philosophy underpins his entire approach to recovery, from cold plunges to supplements.

In the study, one group trained fed with a 13-hour eating window; the other trained completely fasted and waited over an hour post-exercise to eat. Both groups got stronger and gained muscle, but the fed group gained more strength, while the fasting group had better body composition (less fat gain in a hypercaloric state). However, the fasting group became sleepier, did less training volume, and struggled to consume enough calories in the condensed window. Galpin suspects that over 12-16 weeks, the fasting group would have encountered more problems. His conclusion: there is no universal winner; it's a trade-off. For body composition, fasted training may have a slight edge, but if it ruins workout quality or adherence, it's not worth it. The only exception is very high-volume endurance athletes, where feeding before training appears more advantageous. He personally cycles between fasted and fed training.