A personal exercise log is visualized as a scatterplot with dates on the x-axis and muscle groups on the y-axis. Circles mark each recorded workout, with white circles indicating planned sessions and black circles showing completed ones. Lines extend from each muscle’s last workout to the most recent date, revealing gaps in training. The chart uses d3.scalePoint and d3.scaleTime from D3 v6, rendering as SVG. Data comes from a CSV file, filtered by d3.timeDay to show only the last 24 days.