The benefits of physical activity (PA) are well-known, as is the importance of being active from an early age. However, many children, especially children from ethnic minority groups, do not meet recommended PA guidelines, putting them at a higher risk of developing non-communicable diseases such as diabetes and cardiovascular disease in later life. This study aims to identify the perceived barriers and motivators to PA among children from ethnic minority groups living in the United Kingdom and countries with similar socio-economic characteristics, through a qualitative systematic literature review.