With a fitness routine that would send Navy Seals quaking in their ninja boots, Ariel X is THE fittest porn star. She is the ideal trainer for this special feature FuckingMachines.com shot called "Fitness Sex" since she is ripped, domineering, and sexy as all get-out.

Serena Blair, the trainee, is surprisingly resilient. Her personal training includes yoga, dance, cardio, and controlling horses with her quads as an equestrian rider. Serena is the ideal partner for someone as demanding as Ariel X because she understands what it takes to push her body and mind to the limit, enjoys a ... Show more