Current guidelines say that, for health benefits, we should aim for a minimum of 150 minutes of moderate activity or 75 minutes of vigorous activity each week. You can also combine moderate and vigorous activities. If this is too much for you right now, consider starting with shorter bouts, such as 10 minutes and work your way up. Do a little more each time. Once you feel comfortable, do it more often. Every little bit can make a difference in your health!
Source: Centers for Disease Control and Prevention