Trust yourself. In most forms of physical activity, if you are uncomfortable doing it, there is probably damage being done. But that doesn't mean damage isn't a good thing. In weight training, you purposely push yourself to the edge to break down your muscles and build them back stronger. The edge is an undecipherable gray for most novices so don't travel anywhere close without the advice of a trusted advisor. I learned that lesson the hard way when I first started lifting, "push as hard as I can to see the best results."

An experienced advisor makes all the difference in the world. Some things in life just never change: from startups to fitness, seek wisdom for great justice.