Navigate to the Reports Page

Click the "Gains/Losses" tab located near the top center of the page

Select "Test Data" from the first drop down (highlighted in the picture above)

Select the first test period to compare data with

Select the second test period to compare data with

To show the gain/loss in pounds, leave the "Show As Percent" off, to show gain/loss as a percent, click the "Off" switch to turn it on

Click the blue "Load" button

Navigate to the Reports Page

Click the "Gains/Losses" tab located near the top center of the page

Select "Workout Data" from the first drop down (highlighted in the picture above)

Select the date range to view workouts assigned within that time frame

Select the first workout to compare

Select the second workout to compare

Select the set to compare data off of

To show the gain/loss in pounds, leave the "Show As Percent" off, to show gain/loss as a percent, click the "Off" switch to turn it on

Click the blue "Load" button