Is their such thing as chakra?

Depends upon what you believe. There are many that believe in pressure points and the flow of chi through the body. The chakra is a similar sort of belief from a slightly different point of view. Many practitioners of Martial Arts believe that there are energies within the human body that can be manipulated through meditation, massage, pressure points and herbs.

This is one of those things, like religion, that you need to make the call on. Read and research and make your decision.