We all experience stressful conditions in day to day life and body has auto mechanism for it, that is fight or flight. But when this stress prolongs it starts damaging the mind and body. There are many incidents like death of loved ones, breakups, disease, huge financial losses and many which directly throw us into the hands of stress. Unhealthy stressful mind affects body adversely too. So the exercise to keep mind fit is Meditation.
Karma yoga is the union with God by doing. We can say it is "Yoga of Action". But what actions and how they need to be performed. In this context, the principle of Karma Yoga described in the Gita is most acceptable. Bhagavad Gita says that doing nishkama karma, the karma with non attachment, non desire, non intention is the way to attain yoga. What Lord Krishna says more on this, lets see.