I knew Fred since 2014.I started doing exercises then and I was founders of my company's running group. My boss recommended him to me. He started to be my personal coach after I did a few marathons. I couldn't make any progress by myself and my purpose was qualification of Boston Marathon. There's almost one hour gap between my running level at that moment. I decided trust him after I saw my rapidly increasing pace after a series training workouts with him. We finally managed 5mins ahead of qualification of Boston Marathon at my age group which is to finish a marathon in 3h and 36mins. That's like a miracle to me. After then Fred helped me even finished two 100k trail races. He knows my sports potential more than myself and inspires me to achieve higher. Fred isn't a coach who easily prise athletes. But when you really did a good job, you could feel the pure joy from him. It makes you treat your workouts with respect. Fred is a lifetime learner and has a broad range of interest in reading which is not surprised that he could give you sensible advices based on both physical and mental reasons. Lixin qualified for Boston marathon, and completed many ultramarathons.