Should you train cardio and strength on the same day?
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 Interference of Aerobic and Resistance ExercisesCompatibility of Concurrent Aerobic and Strength Training for Skeletal Muscle Size and Function: An Updated Systematic Review and Meta-Analysis | Sports MedicineConcurrent Strength and Endurance Training: A Systematic Review and Meta-Analysis on the Impact of Sex and Training Status | Sports MedicineConcurrent training in team sports: A systematic reviewSpecific Training Effects of Concurrent Aerobic and Strength Exercises Depend on Recovery DurationConcurrent aerobic plus resistance exercise versus aerobic exercise alone to improve health outcomes in paediatric obesity: a systematic review and meta-analysisThe Effects of 12 Weeks of Concurrent and Combined Training on Inflammatory Markers, Muscular Performance, and Body Composition in Middle-Aged Overweight and Obese Males
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Why do some people run hot, while others run cold?
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 BMJGender Matters! Thermal Comfort and Individual Perception of Indoor Environmental Quality: A Literature Review | SpringerLinkSex differences and aging: Is there a role of brown adipose tissue? - ScienceDirectCool Temperature Alters Human Fat and Metabolism | National Institutes of Health (NIH) A Review of Cultural Background and Thermal Perceptions in Urban EnvironmentsOutdoor thermal perception and adaptation of immigrants from cold climates to hot arid climate - ScienceDirectDrivers of diversity in human thermal perception – A review for holistic comfort models - PMC
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Can consuming dairy really give you acne?
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, and a Dietary Information Gap Diet and acne: A systematic reviewCan the right diet get rid of acne? - American Academy of Dermatology Association High school dietary dairy intake and teenage acneEffect of Chocolate on Acne Vulgaris - 1969Double-blind, Placebo-controlled Study Assessing the Effect of Chocolate Consumption in Subjects with a History of Acne Vulgaris
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Cracking your knuckles: good, bad or just annoying?
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 cracking lead to arthritis of the fingers?The Consequences of Habitual Knuckle CrackingEffect of habitual knuckle cracking on hand functionThere might not be anything wrong with your creaky joints - the Health ReportMisophonia: When sounds really do make you "crazy" - Harvard Health
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Can tattoos increase your risk of cancer?
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 - PMCMuch ‘tattoo’ about nothing; Tattoo pigment mimicking breast microcalcifications on mammographyTattoo ink exposure is associated with lymphoma and skin cancers – a Danish study of twins | BMC Public HealthMelanoma Arising in Tattoos: A Case Series and Scoping Review of the LiteratureDoes tattoo ink give you cancer? - Cancer Council Australia2016 report from the Australian Government’s Department of Health, National Industrial Chemicals Notification and Assessment Scheme
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