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PODCAST

What"s That Rash?

Get answers to the health questions everyone"s asking. Our experts give you the information you need to feel good and make the best decisions for your brain and body.

health & fitness medicine

All Episodes

0:18:00

Should you train cardio and strength on the same day?

What"s That Rash? ·

2025/05/27

If you're a keen gym-goer you might've heard conflicting advice about optimising your workout.Some people claim that doing both cardio (getting your heart pumping) and strength (getting those muscles pumping) on the same day might cancel out the benefits.Norman and Tegan unpack what concurrent training is, and what the evidence tells us about its effects.ReferencesA Brief Review on Concurrent Training: From Laboratory to the Field - PMCConcurrent Training: A Meta-Analysis Examining

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0:20:00

Why do some people run hot, while others run cold?

What"s That Rash? ·

2025/05/20

Are you constantly getting scolded for pressing your cold feet against your partner in bed? Or told your hands are icy cold?It’s well known that some people run cold and others run hot. But why does this happen, and does it say anything about your health?Norman and Tegan unpack the physiology and get into some of the reasons we experience temperature differently.References:Individual differences in normal body temperature: longitudinal big data analysis of patient records | The

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0:20:00

Can consuming dairy really give you acne?

What"s That Rash? ·

2025/05/13

You might've heard a friend complaining about their latest break-out and swearing off dairy products as a result. Or that friend might be you.It’s a common complaint, but does it have any scientific merit?Norman and Tegan explore whether consuming dairy can cause acne, and if so, how a glass of milk might lead to pimples.References:The Influence of Genetics and Environmental Factors in the Pathogenesis of Acne: A Twin Study of Acne in WomenPatient Perceptions About Acne, Nutrition,

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0:13:00

Cracking your knuckles: good, bad or just annoying?

What"s That Rash? ·

2025/05/06

You might’ve been told by parents, teachers, colleagues, friends of friends to stop cracking your knuckles because it will give you arthritis.There’s a surprising amount of science going on when you crack a joint, and it suggests there’s very little risk of harming your bones.But as Norman and Tegan explain, there is one major risk – you could irritate everybody around you.References:Mathematical Model for the Sounds Produced by Knuckle Cracking | Scientific ReportsDoes knuckle

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0:20:00

Can tattoos increase your risk of cancer?

What"s That Rash? ·

2025/04/29

When weighing up the health risks of getting a tattoo, most people are concerned about the risk infection.But recently the ingredients in tattoo ink have come under the microscope, with some being identified as potential carcinogens.Norman and Tegan take a look at the many substances used to create permanent art, and whether they carry any real harm to humans.References:Why Tattoos Stay Put | UCSF SynapseWhat's in my ink: an analysis of commercial tattoo ink on the US market -

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0:22:00

Why the carnivore diet is so risky

What"s That Rash? ·

2025/04/22

The carnivore diet asks people to eat entirely animal-based, and the most extreme followers restrict themselves to only meat.Many carnivores claims they feel great — better than they ever have. They have more energy and lose weight.Norman and Tegan tuck into the reasons why carnivores feel better in the short-term, and the dangers they're inviting in the long-term.References: Behavioral Characteristics and Self-Reported Health Status among 2029 Adults Consuming a “Carnivore Diet” -

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0:31:00

The perimenopause diaries from Ladies, We Need to Talk

What"s That Rash? ·

2025/04/17

Hot flashes. Night sweats. Aching joints. Sore boobs. Welcome to your body in perimenopause!In episode one of this four-part series, Yumi Stynes speaks to women in the thick of perimenopause and battling physical symptoms. She also sits down with Dr Susan Davis, endocrinologist and world-leading expert on sex hormones and ageing to learn the best treatments for bothersome symptoms and how look after yourself in this stage of life. No sweat!Essential listening if you're going

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0:18:00

Can you train yourself to pee less?

What"s That Rash? ·

2025/04/15

Do you find yourself complaining that you've got a small bladder, as you run to the toilet for the third time in an hour?There are many reasons a person might pee more than others, including some scary medical conditions. But as Norman and Tegan explain, in most cases your bladder is just deconditioned and you need to get your urinary tract into shape. References:Bladder control: Lifestyle strategies ease problemsA randomized double-blind placebo-controlled clinical trial of a

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0:21:00

How worried should you be about microplastics?

What"s That Rash? ·

2025/04/08

Microplastics are everywhere – they’re in the air, in the water and in our bodies.There’s plenty of evidence for that, but it’s still unclear what effects these microplastics are having on our health.Norman and Tegan unpack what we do and don’t know about these tiny specs of plastic, and what you might be able to do about them.References:Ingested microplastics: Do humans eat one credit card per week?A review of the endocrine disrupting effects of micro and nano plastic and their

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0:20:00

Is daylight saving time bad for us?

What"s That Rash? ·

2025/04/01

This week parts of Australia are preparing to wind back their clocks to mark the ending of daylight saving time.For a long time the country has been divided about the positives and the negatives of changing the clocks twice a year.Norman and Tegan look into the health effects of this shift – from the impact on sleep to medical procedures and road accidents.References:Basic concepts and unique features of human circadian rhythms: implications for human health | Nutrition Reviews |

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0:19:00

Do glasses make your eyesight worse?

What"s That Rash? ·

2025/03/25

If you're short-sighted or long-sighted, have astigmatism or double vision, you now live in a world where glasses can help you out.But there's a misconception hanging around that wearing spectacles weakens your eyes over time, and so some people avoid getting their vision checked.Norman and Tegan focus in on how glasses work and the long term impacts of wearing them.References:When time outside doesn't slow short-sightedness - the Health ReportThe history of spectacles - the

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0:19:00

Don't sweat it? Conventional vs natural deodorants

What"s That Rash? ·

2025/03/18

We haven’t always suppressed our sweat or our natural body odour, but in many cultures now it’s expected we’ll all try to smell our best.You might be seeing more ads for ‘natural’ deodorants that promise to keep you fresh without any harmful ingredients.Norman and Tegan talk through those ingredients, and whether they carry any risks.References:The specific biochemistry of human axilla odour formation viewed in an evolutionary contextUse of Aluminium in Antiperspirants - Australian

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0:17:00

How much protein do you REALLY need?

What"s That Rash? ·

2025/03/11

Protein is having its moment — walk any supermarket aisle and you'll find product after product boasting its protein content. Do you need to be loading up on protein through powders or processed foods, or can you meet your goals with whole foods?Norman and Tegan unpack why protein is important and how much you need each day. References:Protein - Nutrient Reference Values for Australia and New ZealandTips to boost protein in your diet from Dietitians AustraliaHow much protein can

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0:20:00

What's so bad about fine particulate air pollution?

What"s That Rash? ·

2025/03/04

Long-time listeners would have heard Norman decrying fine particulate air pollution and its negative effects on health.But when it’s all around us – on our worksites, in our offices and on our motorways – how are you supposed to protect yourself?Norman and Tegan explain what fine particulate air pollution is, and what it does to the body once it’s breathed in.References:Estimates of global mortality burden associated with short-term exposure to fine particulate matter (PM2.5)The

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0:19:00

Does magnesium work against muscle cramps?

What"s That Rash? ·

2025/02/25

Cramping muscles are common, whether they’re associated with exercise or not.Knowing what causes them can help people avoid them or treat them, but for many people it's not a simple story.Norman and Tegan talk through some of the theories behind this painful phenomenon, and why magnesium might not be the answer.References:Muscle cramps: A comparison of the two-leading hypothesisInfluence of Hydration and Electrolyte Supplementation on Incidence and Time to Onset of

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0:18:00

Which hair loss treatments actually work?

What"s That Rash? ·

2025/02/18

Hair loss is common, but there are many different causes and potentially many different treatments.From topical ointments to light therapy, to scalp massage routines. What works to slow, or even reverse, hair loss?Norman and Tegan comb through the evidence for approved treatments and too-good-to-be-true snake oil.References: Male pattern baldness - HealthdirectMale Androgenetic Alopecia with an overview of treatments - NIHFemale pattern hair loss - HealthdirectWhat is minoxidil,

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0:01:19

We're answering your questions LIVE! March 30!

What"s That Rash? ·

2025/02/17

What's That Rash? is returning to the World Science Festival Brisbane for another year. Norman and Tegan will be answering the health questions everyone (at WSFB) is asking, 10am on March 30 at Queensland Museum Theatre. Check out the event here and send in your questions to thatrash@abc.net.au

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0:20:00

Can functional mushrooms really help treat cancer?

What"s That Rash? ·

2025/02/11

The use of mushrooms in medicine goes back centuries, but there’s still a lot to learn about the bioactive compounds in fungi.There are many claims surrounding 'functional mushrooms' – types of mushrooms thought to have medicinal properties beyond simple nutrition.These include lion’s mane, reishi, cordyceps, shiitake and turkey tail.Norman and Tegan forage through the evidence for using mushrooms against cancer, to boost the immune system and to amplify cognition.We're doing a

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0:18:00

Why are people taping their mouths?

What"s That Rash? ·

2025/02/04

Depending on your corner of the internet, you might have seen people swearing by this new sleep hack, mouth taping.People claim they’re better rested, have better breath and stronger jawlines – all because they force themselves to breathe through their noses overnight.Norman and Tegan tackle this taping trend with an N=1 experiment, and a look at the relevant research.References:Mouth taping: a little less conversation, a little more action, please!Effect of mouth taping at night

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0:15:00

There's a lot of fog around brain fog

What"s That Rash? ·

2025/01/28

Unfortunately many more people have heard about brain fog because of the pandemic and long COVID.But the symptom was first mentioned centuries ago, and has been associated with dozens of conditions.Norman and Tegan try to define brain fog, and explain why it can be difficult to treat.References:What is brain fog? - BMJ neuropsychiatrySubjective brain fog: a four-dimensional characterization in 25,796 participantsComprehensive Clinical Characterisation of Brain Fog in Adults

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