Suppose [California], Oct 5 (BBC): A new study published in the Journal of Medicine and Science has found that regular exercise can significantly reduce the risk of developing heart disease in middle-aged adults. The study, which followed 1000 participants over a 10-year period, found that those who engaged in at least 30 minutes of moderate exercise five times a week were 50% less likely to develop heart disease compared to sedentary individuals.
Can we infer that "All participants in the study were over the age of 60"? Yes, no, or maybe?