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Vo2max

All articles tagged with #vo2max

technology1 month ago•7 min saved

Smartwatches Give Rough Health Estimates, Not Exact Readouts

A Conversation explainer says six common smartwatch health metrics—calories burned, steps, heart rate, sleep, recovery, and VO2max—are estimates, not direct measurements. Calorie estimates can be off by over 20%, steps undercount by about 10%, heart-rate accuracy decreases at higher intensities, sleep stages are unreliable, and recovery metrics (based on HRV and sleep) and VO2max readings are biased. Treat daily numbers as rough trends, and rely on how you feel, how you perform, and your actual recovery to guide training.

via ScienceAlert|

#calorie-estimation #heart-rate-variability #smartwatches

health2 months ago•32 min saved

Weight-Loss Drugs Help, But Exercise Keeps You Truly Fit

A Danish study followed 193 adults after an eight-week very-low-calorie diet and randomized them to exercise, a GLP-1 drug (liraglutide), both, or neither for a year. While the drug helped maintain weight loss, fitness improvements came from exercise—taking the drug without exercising offered little benefit, and combining both yielded the best weight maintenance. Across measures like stair-climb time and VO2 max, exercise consistently boosted fitness, underscoring that GLP-1 meds aren’t a substitute for physical activity.

via Outside Magazine|

#exercise #fitness #glp-1

science2 months ago•6 min saved

Fit Bodies, Sharper Brains: Bigger BDNF Boosts With Exercise

A 12-week cycling program increases aerobic fitness and makes the brain release more BDNF in response to a single 15-minute workout; fitter participants show larger BDNF spikes and stronger prefrontal cortex activity during attention and inhibition tasks, with the boost tracking with VO2max gains, suggesting fitness amplifies the brain’s response to exercise.

via Neuroscience News|

#bdnf #exercise #neuroscience

technology4 months ago•11 min saved

AI Health Tools Read My Apple Watch Data—And The Results Were All Over the Map

The author tested OpenAI's ChatGPT Health and Anthropic's Claude by uploading a decade of Apple Health data (and later medical records) to obtain a simple cardiac-health grade. Outputs swung widely—ChatGPT gave an F, then a D after adding records; Claude varied between C and B—driven by noisy VO2 max estimates and changing resting heart-rate data. Experts say the analyses are not medical advice, and privacy promises to protect data aren’t HIPAA-covered. While AI health tools could unlock insights, the article argues they’re not ready for personal clinical decisions and should mainly support prepping for a doctor visit.

via Yahoo|

#ai-health #apple-watch #data-privacy

health-and-fitness2 years ago•3 min saved

"Discover Your Fitness Age with This Handy Calculator"

Norwegian scientists have developed a fitness age calculator that determines the age equivalent of one's fitness level based on markers of cardiovascular health, such as exercise habits and oxygen utilization. A lower fitness age is associated with reduced risk of heart disease, depression, and other health issues. The calculator, available online, aims to provide a more accurate predictor of longevity than traditional metrics like BMI. Regular aerobic exercise can help reduce fitness age, and studies have shown strong correlations between higher aerobic fitness and improved cardiovascular health outcomes.

via Daily Mail|

#calculator #cardiovascular-health #exercise