--- title: "#fitness articles | Hashnode" description: "Explore 454 articles tagged #fitness on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/fitness" --- Tag # #fitness 454 posts · 220 followers [Victoria Peter](https://hashnode.com/@victoriapeter) · [Nov 5](https://hashnode.com/posts/how-to-build-ai-powered-workout-recommendation-system/6aec0adc527ac0b46cdd0c31) ### [How to Build an AI-Powered Workout Recommendation System](https://tech-trends-news.hashnode.dev/how-to-build-ai-powered-workout-recommendation-system?utm_source=hashnode&utm_medium=feed) A practical guide to building personalised fitness experiences using AI, machine learning algorithms, user activity data, and wearable technology. 14 min read · [tech-trends-news.hashnode.dev](https://tech-trends-news.hashnode.dev/how-to-build-ai-powered-workout-recommendation-system?utm_source=hashnode&utm_medium=feed) [Mike Chen](https://hashnode.com/@poolside-notes) · [Oct 14](https://hashnode.com/posts/why-waterproof-bluetooth-still-dies-mid-lap-and-three-ways-people-actually-listen-while-swimming/6acf9492a27cc0a669ac7f07) ### [Why “waterproof Bluetooth” still dies mid-lap — and three ways people actually listen while swimming](https://poolside-notes.hashnode.dev/why-waterproof-bluetooth-still-dies-mid-lap-and-three-ways-people-actually-listen-while-swimming?utm_source=hashnode&utm_medium=feed) If you’ve ever bought “waterproof Bluetooth earbuds” for the pool and lost the music the second your head went under, you’re not crazy — and it usually isn’t a fake listing. Water absorbs 2.4 GHz Blue 2 min read · [poolside-notes.hashnode.dev](https://poolside-notes.hashnode.dev/why-waterproof-bluetooth-still-dies-mid-lap-and-three-ways-people-actually-listen-while-swimming?utm_source=hashnode&utm_medium=feed) [Famitha M A](https://hashnode.com/@famth) · [Sep 28](https://hashnode.com/posts/how-to-build-a-fitness-wearable-app-with-react-native/6aba7a0be3c4b3c8806f26d2) ### [How to Build a Fitness Wearable App with React Native](https://fami-blog.hashnode.dev/how-to-build-a-fitness-wearable-app-with-react-native?utm_source=hashnode&utm_medium=feed) HealthKit, Health Connect, Bluetooth LE, and background reliability: the parts most fitness app tutorials skip 11 min read · [fami-blog.hashnode.dev](https://fami-blog.hashnode.dev/how-to-build-a-fitness-wearable-app-with-react-native?utm_source=hashnode&utm_medium=feed) [Waqas Solangi](https://hashnode.com/@globaltools) · [Aug 20](https://hashnode.com/posts/how-i-built-an-ideal-weight-bmi-body-fat-calculator-in-vanilla-javascript/6a86d95bee88e35b950a58e8) ### [How I Built an Ideal Weight, BMI & Body Fat Calculator in Vanilla JavaScript](https://globaltoolsbox.hashnode.dev/how-i-built-an-ideal-weight-bmi-body-fat-calculator-in-vanilla-javascript?utm_source=hashnode&utm_medium=feed) Learn how to analyze body composition metrics using Ideal Body Weight (IBW), BMI, and body fat percentage formulas with interactive tools. 1 min read · [globaltoolsbox.hashnode.dev](https://globaltoolsbox.hashnode.dev/how-i-built-an-ideal-weight-bmi-body-fat-calculator-in-vanilla-javascript?utm_source=hashnode&utm_medium=feed) [Theapplediscussion](https://hashnode.com/@theapplediscussion) · [Aug 19](https://hashnode.com/posts/apple-watch-move-goal-vs-calorie-goal-they-re-not-the-same-thing/6a900d96ce7f50cc5950b767) ### [Apple Watch Move Goal vs Calorie Goal — They're Not the Same Thing](https://theapplediscussion.hashnode.dev/apple-watch-move-goal-vs-calorie-goal-they-re-not-the-same-thing?utm_source=hashnode&utm_medium=feed) Conflating active calories and total calories leads to goals that are either too easy or impossible. Here's how to set both correctly. 3 min read · [theapplediscussion.hashnode.dev](https://theapplediscussion.hashnode.dev/apple-watch-move-goal-vs-calorie-goal-they-re-not-the-same-thing?utm_source=hashnode&utm_medium=feed) [Dozo](https://hashnode.com/@uhdozo) · [Aug 17](https://hashnode.com/posts/i-built-a-bowl-builder-tool-for-nawtch-and-the-save-button-was-harder-than-it-sounds/6a836156d4688cb62f216e27) ### [I Built a Bowl Builder Tool for Nawtch, and the Save Button Was Harder Than It Sounds](https://nawtch.hashnode.dev/i-built-a-bowl-builder-tool-for-nawtch-and-the-save-button-was-harder-than-it-sounds?utm_source=hashnode&utm_medium=feed) Nawtch's free bowl & meal builder tracks calories and macros with no account needed, and why saving a bowl had to work differently than saving a food. 4 min read · [nawtch.hashnode.dev](https://nawtch.hashnode.dev/i-built-a-bowl-builder-tool-for-nawtch-and-the-save-button-was-harder-than-it-sounds?utm_source=hashnode&utm_medium=feed) [Theapplediscussion](https://hashnode.com/@theapplediscussion) · [Aug 17](https://hashnode.com/posts/apple-watch-calorie-burn-calculator-how-many-calories-does-your-workout-actually-burn/6a900ee06762dac7c17d5e2f) ### [Apple Watch Calorie Burn Calculator — How Many Calories Does Your Workout Actually Burn?](https://theapplediscussion.hashnode.dev/apple-watch-calorie-burn-calculator-how-many-calories-does-your-workout-actually-burn?utm_source=hashnode&utm_medium=feed) Apple Watch gives you a number. Here's what goes into it — and why it varies more than you'd expect. 3 min read · [theapplediscussion.hashnode.dev](https://theapplediscussion.hashnode.dev/apple-watch-calorie-burn-calculator-how-many-calories-does-your-workout-actually-burn?utm_source=hashnode&utm_medium=feed) [Theapplediscussion](https://hashnode.com/@theapplediscussion) · [Aug 15](https://hashnode.com/posts/apple-watch-steps-pace-distance-why-the-numbers-don-t-always-line-up/6a90102dceadf3cac2188d88) ### [Apple Watch Steps, Pace & Distance — Why the Numbers Don't Always Line Up](https://theapplediscussion.hashnode.dev/apple-watch-steps-pace-distance-why-the-numbers-don-t-always-line-up?utm_source=hashnode&utm_medium=feed) These three metrics are not directly derived from each other. Here's how each is calculated and where gaps appear. 2 min read · [theapplediscussion.hashnode.dev](https://theapplediscussion.hashnode.dev/apple-watch-steps-pace-distance-why-the-numbers-don-t-always-line-up?utm_source=hashnode&utm_medium=feed) [Theapplediscussion](https://hashnode.com/@theapplediscussion) · [Aug 13](https://hashnode.com/posts/apple-watch-vo2-max-explained-what-it-measures-heart-rate-zones-and-where-the-estimate-falls-short/6a9011a35f23ac6804ac226e) ### [Apple Watch VO2 Max Explained — What It Measures, Heart Rate Zones, and Where the Estimate Falls Short](https://theapplediscussion.hashnode.dev/apple-watch-vo2-max-explained-what-it-measures-heart-rate-zones-and-where-the-estimate-falls-short?utm_source=hashnode&utm_medium=feed) VO2 max is legitimate science. Apple Watch's implementation has specific limitations you should understand before acting on the number. 3 min read · [theapplediscussion.hashnode.dev](https://theapplediscussion.hashnode.dev/apple-watch-vo2-max-explained-what-it-measures-heart-rate-zones-and-where-the-estimate-falls-short?utm_source=hashnode&utm_medium=feed) [Theapplediscussion](https://hashnode.com/@theapplediscussion) · [Aug 9](https://hashnode.com/posts/apple-watch-fitness-age-the-longevity-metric-most-users-ignore/6a901523783f41a864e13c60) ### [Apple Watch Fitness Age — The Longevity Metric Most Users Ignore](https://theapplediscussion.hashnode.dev/apple-watch-fitness-age-the-longevity-metric-most-users-ignore?utm_source=hashnode&utm_medium=feed) Your fitness age can be 10 years younger or older than your real age. Here's the science behind it and how to calculate yours. 3 min read · [theapplediscussion.hashnode.dev](https://theapplediscussion.hashnode.dev/apple-watch-fitness-age-the-longevity-metric-most-users-ignore?utm_source=hashnode&utm_medium=feed)