Philippe Coutinho and Adam Lallana were put through their paces during their first day back at Melwood following their summer breaks.
The Liverpool duo underwent a number of tests during which their results were measured and logged in a database to be used as a reference point later in the season.
Both midfield stars were pictured performing standing and running jumps in addition to leg power and flexibility exercises.



The squad are seven days into their pre-season schedule but Coutinho and Lallana have only just returned and met up with their team-mates.