I believe the graphs indicate nothing about the no heart disease group; however, it more indicates that people are more likely to get heart disease as an adult than as a child, since the data peaks at around 55 years of age for males and 60 for females.
For Max Heart Rate, it seems like there may be a correlation between higher heart rate in individuals with heart disease and individuals with no heart disease. However, looking at the female group especially, it appears that the difference may be insignificant due to the large overlap at the peaks of the graphs.