Four minutes of active exercise a day reduces the risk of cancer.

The results are based on an analysis of data from 22,398 adults who wore activity trackers on their wrists for seven days. The scientists then studied the participants' cancer-related diagnoses over several years. Those who engaged in physical activity for an average of 4.5 minutes a day, the risk of cancer of the kidneys, bladder, stomach and lungs, on average, decreased by 32%.