The Answer is Yes!
Mind-Body Connection does exist.
Plenty of researches proves the existence of Mind- Body Connection.
A person's body and mind are dynamically interrelated that distress felt in one area of your well-being can have effects on another area. This means that our thoughts, feelings, beliefs, and attitudes can positively or negatively affect our biological functioning.
Likewise, how we take care of our physical body - What we eat, how much we exercise, even our posture can impact our mental state positively or negatively thus exhibiting a complex interrelationship between our minds and bodies. A branch of science Psycho-Neuro-Immunology deals with understanding the bidirectional communication pathways between the brain and the immune system and the implications of this network for behavior are emphasized.