Increased physical activity reduces breast cancer risk, international study suggests

Study of 130,000 women used genetic analysis to establish causal link between activity levels and cancer risk

Increasing physical activity and reducing time spent sedentary is likely to decrease the risk of breast cancer, a study of more than 100,000 women suggests.

An international team including researchers from Australia, the UK and US have used genetic analysis to establish a causal relationship between overall activity levels and cancer risk.