Fitness and Keeping Fit

These are the most popular dating sites in this category.

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1. Fitness Singles
Fitness Singles is the world's largest online dating site dedicated to active singles.
https://www.fitness-singles.com/  

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2. Datefit
https://www.datefit.com/  

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3. Fitness Friends Date - Free Fit Singles Dating Site
Discover Fitness Friends Date, the Totally free fitness dating site for single fitness gurus and healthy singles. Never pay anything here. Meet fit singles!
http://fitnessfriendsdate.com  

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4. Fit Singles Online | Fitness Dating Site For Singles Who Love Fitness
Fit Singles Online - The fitness dating site for people who love fitness and want to meet fitness oriented singles in their area. Join Free Today
https://www.fitsinglesonline.com/