Update README.md

README.md

@@ -16,12 +16,17 @@ Workouts are defined as a series of steps, where a step is either a period of ti
 For example 10 minutes or 400 metres. A step can also have a target such as a pace or a heart rate. 
 Steps are written as text, for example:
 
+| Workout | Description |
+| ------- | ----------- |
 | `1mi` | A step of 1 mile |
 | `400m` | A step of 400 metres |
 | `100m@4:00-5:00/km` | A step of 100 metres with a target pace between 4 and 5 minutes per kilometre |
 | `1mi>6mph` | 1 mile faster than 6 miles per hour |
 
 Steps can also be strung together with a `+` character, repeated using `*n` and grouped using brackets, for example:
+
+| Workout | Description |
+| ------- | ----------- |
 | `1mi + (400m@7:00-8:30/mi + 200m@10:00-12:00/mi) * 4 + 1mi` | An interval session comprising 4 repeats of 400m with 200m recoveries plus a mile of warm-up and cool-down |
 
 More examples can be found in `ExampleWorkoutSchedule.xls`