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Using Temperature for Performance, Brain & Body Health | Dr. Craig Heller — Whalespan

Content›Video›Using Temperature for Perfor…

Using Temperature for Performance, Brain & Body Health | Dr. Craig Heller

Andrew Huberman1h 52m · 2021-10-04

Claims Made

152

Claims Supported

118

Support Rate

78%

Support rate

118 of 152 claims supported

118 supported34 partial / not

Claims from this content

126

✓Well SupportedAndrew Huberman drinks Athletic Greens twice a day, typically once in the morning and again in the afternoon or late afternoon, mixed with water and lemon or lime juice.✓Well SupportedProbiotics in Athletic Greens are vital for microbiotic health, which communicates with the brain and immune system to impact immediate and long-term health.✓Well SupportedAthletic Greens is a drink containing vitamins, minerals, probiotics, and adaptogens designed to meet foundational nutritional needs and aid recovery from stress.✓Well SupportedAthletic Greens supports the gut microbiome, which is vital for the immune system, endocrine system, and gut-brain axis, influencing mood and neurotransmitter production.

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A. Volkovreader

4h

Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

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N. Park

2d

Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

✓Well Supported

Cooling specific body parts like the palms, soles of the feet, or face is a better recovery strategy after endurance training than full body cold water immersion.

✓Well SupportedSupplements should be of the highest quality, with ingredient amounts on the label precisely matching the product's content.

✓Well SupportedPlacing cold packs on the face, palms, and soles results in double the cooling rate compared to the axilla, groin, or neck.

✓Well SupportedReducing core body temperature through palmar cooling can improve exercise performance.

✓Well SupportedReducing blue light exposure from screens at night helps protect circadian rhythms and signals to the body that it is time to sleep.

✓Well SupportedHot baths, hot showers, or saunas before sleep can accelerate the body's cooling process, leading to easier sleep onset.

✓Well SupportedSubjects using palmar cooling after every other set of pull-ups increased their total pull-ups from approximately 100 to 180.

✓Well SupportedTo increase metabolism via deliberate cold exposure, it is advisable to reach a shivering state.

✓Well SupportedCooling the upper face, palms, and soles of the feet aids rapid heat dissipation.

✓Well SupportedVitamin D3 K2 is important for metabolic health, endocrine health, and heart health, with K2 regulating calcium in bones.

✓Well SupportedCooling interventions can increase the amount of work or number of repetitions with the same weight during strength training, sometimes requiring an increase in sets.

✓Well SupportedThe medial preoptic area of the hypothalamus acts as the body's thermostat and integrates thermal afferent information from the entire body.

✓Well SupportedScreens should not be used within two hours of bedtime due to blue light affecting circadian rhythms.

✓Well SupportedCold water immersion up to the neck is more effective than cold showers for adaptation due to the ability to achieve lower temperatures.

✓Well SupportedCaffeine's antagonism of adenosine leads to wakefulness and consequently a higher metabolic rate compared to being asleep.

✓Well SupportedTemperature is a powerful variable for improving physical performance, skill learning, and recovery.

✓Well SupportedElevated muscle temperature above a narrow range (around 39-40°C) impairs ATP function, reducing muscle contraction ability and limiting exercise performance.

✓Well SupportedMuscle metabolism can increase 50-60 fold during intense anaerobic activity, producing significant heat.

◐Partially SupportedApplying heat to glabrous skin, like the feet, is effective for warming a hypothermic person.

◐Partially SupportedGlabrous skin contains specialized blood vessels that act as shunts between arteries and veins.

◐Partially SupportedMuscle heating during exercise can contribute to muscular failure, with signals about tissue heating conveyed to the brain.

◐Partially SupportedCooling the palms of the hands can significantly increase running distance, lifting capacity, and repetitions performed.

✓Well SupportedMaintaining a regular bedtime and wake-up time is a key component of good sleep hygiene.

✓Well SupportedCognitive Behavioral Therapy for Insomnia (CBT-I) is considered the gold standard for treating insomnia.

◐Partially SupportedHolding cold items in one hand and switching can be used to test for vasodilation or vasoconstriction.

◐Partially SupportedArteriovenous anastomoses (AVAs) in the face, palms, and soles of the feet allow for rapid heat exchange.

◐Partially SupportedThe CoolMitt circulates water at a temperature designed to avoid vasoconstriction in the palm, leveraging glabrous skin for cooling.

◐Partially SupportedWhen using cold water for cooling effects, it should not be ice water or excessively cold, as this can cause vasoconstriction and prevent heat transfer.

◐Partially SupportedCold showers or ice baths can cause a significant adrenaline release, which may not translate to physiological or performance improvements.

◐Partially SupportedThe body's thermostat lowers its set point as bedtime approaches, causing a feeling of coolness.

◐Partially SupportedTemperature rise in the lower body can influence fatigue in the upper body muscles.

✕Not SupportedPlacing bare feet on frozen peas is not optimal for heat transfer due to lack of circulation.

◐Partially SupportedThe most immediate impairment of muscle activity and fatigue is the rise in muscle temperature.

◐Partially SupportedCooling the brain can be achieved by pouring water on the head, as cool blood from the facial region can circulate and cool the brain.

◐Partially SupportedWearing a knit cap at the start of a run to warm up and removing it as body temperature increases is a rational practice.

◐Partially SupportedIn a cool sleeping environment, one can passively regulate body temperature by exposing heat loss surfaces like hands and legs.

◐Partially SupportedTaking a cool shower before a long run can delay sweating and heat buildup.

◐Partially SupportedHeat loss portals are located in hairless skin areas like the pads of the feet and the upper face.

◐Partially SupportedApplying cold stimuli to the torso with an ice vest can impair the rate of heat loss.

◐Partially SupportedStandard treatment for hyperthermia involves placing cold packs in the axilla, groin, and neck due to thin skin and high vasculature.

✓Well SupportedEsophageal temperature measurement is the most accurate method for determining core body temperature.

◐Partially SupportedDuring heat stroke transition, individuals may vasoconstrict, stop sweating, and experience cardiac drift.

◐Partially SupportedAnabolic steroids produce similar performance improvements in females as in males.

◐Partially SupportedApplying a cold stimulus to the neck can cool the brain's thermostat and lead to feeling cooler than one actually is.

◐Partially SupportedArteriovenous anastomoses (AVAs) are special blood vessels connecting arteries and veins with a previously unknown function.

◐Partially SupportedBrown fat is activated by both cold and warming of the skin, suggesting it functions as a general temperature regulator.

◐Partially SupportedRunning with a loose grip on the fingers is more beneficial for performance than gripping tightly.

◐Partially SupportedMuscle temperature rise is a limiting factor in exercise performance.

◐Partially SupportedApplying ice packs to the upper back may stimulate brown fat activation by signaling cold to the hypothalamus.

◐Partially SupportedPatients under anesthesia become vasodilated and hypothermic, leading to vasoconstriction that impedes heat transfer into the body upon emergence.

◐Partially SupportedIncreasing muscle activity of any kind increases energy consumption and heat production.

◐Partially SupportedA prototype device using a heating pad and negative pressure can warm a hypothermic patient's core temperature to normal in approximately 8-9 minutes.

◐Partially SupportedHolding frozen items like peas or blueberries for cooling hands may require experimentation to find the optimal duration and frequency for individual benefit, as there are no established studies on these crude methods.

◐Partially SupportedBears drop their core body temperature to approximately 33-34 degrees Celsius when hibernating.

◐Partially SupportedThe skin, fascia, and muscles are effective insulators, preventing rapid heat loss from the body.

◐Partially SupportedConvection, such as wind chill from a cool breeze, increases heat exchange between objects.

◐Partially SupportedThe standard model of blood flow from arteries to capillaries to veins is still accurate.

◐Partially SupportedBrain freeze may be caused by direct cooling of the roof of the mouth near the hypothalamus, leading to vasomotor changes and pain receptor activation.

◐Partially SupportedAnabolic steroids, typically testosterone derivatives, are used to enhance performance by allowing faster recovery and increased protein synthesis.

◐Partially SupportedArteria's cooling technology is in beta testing with professional sports teams and military units.

◐Partially SupportedWarm pads with circulating water can be used to warm individuals, particularly by placing them on the feet.

◐Partially SupportedTympanic temperature measurement is a good method for assessing core body temperature if the device is aimed correctly.

◐Partially SupportedCaffeine acts as an adenosine antagonist, which may hinder muscular performance by reducing adenosine release and oxygen utilization.

◐Partially SupportedThe primary purpose of warming up before exercise is to increase flexibility and prevent joint, tendon, and ligament damage.

◐Partially SupportedIn an experiment, young women performed 10 sets of pushups to muscle failure with 3 minutes of cooling between sets, with some reaching over 800 pushups in total.

◐Partially SupportedCooling between exercise sets enhances performance and reduces muscle soreness.

◐Partially SupportedPain receptors are not present in brain neural tissue but are associated with blood vessels and meninges, and increased blood pressure to the brain can activate these receptors, potentially causing headaches.

◐Partially SupportedHospital recovery rooms use warm blankets and heat lamps for hypothermic patients, taking one to two hours to stop shivering.

✕Not SupportedGripping handlebars too tightly while cycling can limit performance by restricting blood flow and heat dissipation from the hands.

◐Partially SupportedForehead temperature readings are a crude but useful surface temperature measurement because the forehead has less insulation between the skin and the brain compared to other areas.

◐Partially SupportedNon-exercise activity thermogenesis (NEAT) can significantly increase daily caloric expenditure.

◐Partially SupportedHibernating animals below 15-16 degrees Celsius cannot shiver and rely on brown fat activation due to temperature effects on nerve and muscle conduction.

◐Partially SupportedRunning without shoes may increase a runner's capacity to lose heat.

◐Partially SupportedCooling the palms of the hands can be integrated into a three-minute rest period during strength training workouts.

◐Partially SupportedUsing a water-profused pad with circulating cool water is a viable method for cooling the feet.

◐Partially SupportedShivering can increase metabolism up to three to four times resting metabolic rate, whereas exercise can increase it up to ten times.

◐Partially SupportedPalms can sweat and feel hot while the backs of hands ache from cold when exposed to cold environments without gloves.

◐Partially SupportedTemperature regulation will become a more powerful parameter for performance enhancement focus, similar to nutrition and sleep.

◐Partially SupportedApplying cold water to the head is a natural mechanism for cooling the brain.

✕Not SupportedApplying a cold pack to the head or neck may be counterproductive for cooling down quickly and can lead to hyperthermia.

✕Not SupportedWearing gloves impedes heat loss from the hands, and thicker protectors on hands and feet will reduce heat dissipation.

◐Partially SupportedCooling technology can double endurance in individuals walking on a treadmill uphill in 40°C ambient temperature.

◐Partially SupportedMitochondrial energy production can be impaired at lower body temperatures.

◐Partially SupportedApproximately 80% of the energy derived from food is lost as heat, with only about 20% used for work.

◐Partially SupportedThe goal during cold exposure, particularly when using cold packs on extremities, is to avoid vasoconstriction to prevent heat retention.

◐Partially SupportedEnergy drinks often contain vasodilators, caffeine, stimulants, glucose, and sometimes nootropics.

◐Partially SupportedArteria is developing cooling technology with a product called CoolMitt.

◐Partially SupportedForehead skin has less insulation than biceps skin, making it suitable for measuring surface temperature.

◐Partially SupportedA rise in body temperature decreases cognitive capacity, making complex tasks difficult.

◐Partially SupportedWearing socks to sleep may promote thermal comfort by insulating the toes.

◐Partially SupportedCooling the body surface when overheated can trick the thermostat, while core temperature continues to rise.

◐Partially SupportedIndividuals with multiple sclerosis are temperature-sensitive and must stay in cool locations and avoid significant exercise increases.

◐Partially SupportedHumans possess brown fat distributed throughout the body.

◐Partially SupportedHelmets should be ventilated to prevent thermal insulation of the scalp because the brain generates significant heat.

◐Partially SupportedCooling devices on golf carts helped multiple sclerosis patients play golf in the summer.

◐Partially SupportedA technology developed for the Department of Defense, when adopted by subjects, added 20 yards to every club in their golf bag.

◐Partially SupportedBrown fat is a specialized tissue for heat production containing stored energy, mitochondria, and significant blood supply.

◐Partially SupportedFor anaerobic athletes, the temperature of specific muscles used will increase during exercise, even if core temperature does not rise rapidly.

◐Partially SupportedA standardized rest period of three minutes between sets was used in the dips exercise study.

◐Partially SupportedShivering, activated by brown fat, increases metabolism and body temperature.

◐Partially SupportedCognitive behavioral therapy for sleep enhances sleep hygiene, which includes maintaining a regular bedtime and wake-up time.

✕Not SupportedBeta-3 agonists like clenbuterol were banned due to recreational use leading to deaths from dehydration, overheating, and cardiac effects.

✕Not SupportedDeliberately heating a hypothermic person's torso while leaving extremities exposed is incorrect.

◐Partially SupportedThe optimal duration for using the CoolMitt is standardized at three minutes to capture the most significant portion of the exponentially declining heat loss curve.

✕Not SupportedEating extremely hot chili peppers can cause a thunderclap headache, which may lead to stroke and brain damage.

◐Partially SupportedApplying a cool towel to quadriceps after squats may not be effective for cooling muscles due to insulation by surface layers.

◐Partially SupportedUsing a frozen juice can or frozen blueberries to cool hands may not be as effective as the CoolMitt for maximizing heat loss.

◐Partially SupportedConsistent exposure to cold might increase brown fat, while living in the tropics might lead to less brown fat.

◐Partially SupportedCold baths or showers stimulate vasoconstriction, making it slightly more difficult for the body to dissipate heat.

◐Partially SupportedA boundary layer of still water develops during cold water immersion but not during a cold shower.

◐Partially SupportedThe CoolMitt is used by the Stanford football team in hot climates for cold therapy.

◐Partially SupportedCooling can decrease swelling, inflammation, and blood flow, which may help offset physical damage to the brain.

◐Partially SupportedApproximately 80% of the energy expended during muscle activity is lost as heat.

◐Partially SupportedNewborns have more brown fat than adults.

◐Partially SupportedHeating devices may alleviate migraines.

◐Partially SupportedThe carotid and vertebral arteries in the neck are the major blood supply to the brain.

◐Partially SupportedDrinking 16 ounces of ice water can help with cooling but excessive amounts can cause problems.

◐Partially SupportedHyperthyroidism is associated with increased metabolic rate and feeling hot, while hypothyroidism is associated with reduced movement and feeling cool.

◐Partially SupportedGround squirrels and marmots can drop their body temperature to within one or two degrees Celsius of ambient environment during hibernation.

◐Partially SupportedBears undergo true hibernation involving physiological changes monitored through implanted sensors measuring EEG, EKG, temperature, and oxygen consumption.

◐Partially SupportedFeeling subjectively cool from localized cooling can be deceptive, as internal body temperature may still be dangerously high.

◐Partially SupportedOptimal cooling portals are located in glabrous skin, such as the pads of the feet and upper face.