Fitness apps have transformed how people train, track progress, and stay motivated. Among the leaders in this space; Strava, Garmin, and Whoop stand out for integrating artificial intelligence (AI) to enhance user experience. AI now plays a key role in analysing data, offering personalised insights, and even guiding workouts. But has AI replaced human coaches, or do real people still bring something unique to the table? This post explores how AI is used in these popular apps,

Heart Rate Variability (HRV). Watch face showing strained training status based upon HRV You’ve probably heard of Heart Rate Variability (HRV) by now - but how much do you really understand it? The History HRV was first detected in 1733 by Stephen Hales who noticed changes in arterial pressure linked to breathing. In 1847 Carl Ludwig noticed that the timing between individual heart beats varied alongside whether someone was inhaling, or exhaling. During inhalation (breathing