Philippe Coutinho and Adam Lallana ran, jumped and stretched their way through first session back
Their data was logged and will be used as a comparison when same tests are taken during next season
Lallana received a warm welcome from Sadio Mane upon the England international's return to Melwood
Coutinho has been linked with a move away but remains an integral part of Jurgen Klopp's plans at Liverpool
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.
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