![Frontiers | HR Max Prediction Based on Age, Body Composition, Fitness Level, Testing Modality and Sex in Physically Active Population Frontiers | HR Max Prediction Based on Age, Body Composition, Fitness Level, Testing Modality and Sex in Physically Active Population](https://www.frontiersin.org/files/Articles/695950/fphys-12-695950-HTML-r2/image_m/fphys-12-695950-g001.jpg)
Frontiers | HR Max Prediction Based on Age, Body Composition, Fitness Level, Testing Modality and Sex in Physically Active Population
![What's YOUR fitness age? New calculator tells you if you're old beyond your years in a few simple steps | Daily Mail Online What's YOUR fitness age? New calculator tells you if you're old beyond your years in a few simple steps | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2013/11/04/article-2487135-192FB2B800000578-474_306x498.jpg)
What's YOUR fitness age? New calculator tells you if you're old beyond your years in a few simple steps | Daily Mail Online
![Garmin Connect's Fitness Age thinks I (5' 8" 29 y.o. male) can/should lose 30 lbs to reach a weight of 137 lbs, which I think is unhealthy. Support told me they "understand Garmin Connect's Fitness Age thinks I (5' 8" 29 y.o. male) can/should lose 30 lbs to reach a weight of 137 lbs, which I think is unhealthy. Support told me they "understand](https://external-preview.redd.it/garmin-connects-fitness-age-thinks-i-5-8-29-y-o-male-can-v0-LCnpjQ10X9fa1EDzq2ppdd3KdUsPCGfRi-pLUGsZea4.jpg?width=640&crop=smart&auto=webp&s=ae1fe26dbbf24d011dd34ee0838bd5a6169bf118)
Garmin Connect's Fitness Age thinks I (5' 8" 29 y.o. male) can/should lose 30 lbs to reach a weight of 137 lbs, which I think is unhealthy. Support told me they "understand
![What's YOUR fitness age? New calculator tells you if you're old beyond your years in a few simple steps | Daily Mail Online What's YOUR fitness age? New calculator tells you if you're old beyond your years in a few simple steps | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2013/11/04/article-2487135-192F9D3900000578-606_306x703.jpg)