After an almost six-week break, the United players returned to Darsley Park to get put through their paces.
Some players were at the training ground as early as 7am as the squad were given staggered arrival times for fitness testing on their return.
Players who went on international duty following the end of the Premier League campaign, including Kieran Trippier, Bruno Guimaraes, Fabian Schar and new signing Sven Botman, have been given extra time off.
Brendan Rodgers reveals he talked Swansea City defender out of move to Newcastle United whilst on Mount Kilimanjaro
Sunderland suffer major injury blow
Newcastle United transfer news: Chelsea ‘considering second bid’ for Newcastle target, Southampton forward ‘top’ of Everton wanted list
Goncalo Ramos' 14-word response to Newcastle United transfer interest following ‘bid’ reports
Sergio Aguero backs 'difficult' Newcastle United, Aston Villa and Brighton to ‘fight’ for Europe
Striker Callum Wilson is one player who will be keen to prove his fitness ahead of the new Premier League season on August 6. The 30-year-old missed almost all of the second half of last season due to a calf injury before returning to the starting line-up in the final couple of matches.
He ended the season as Newcastle’s top scorer with eight goals to his name after netting a brace on the final day against Burnley at Turf Moor.
Wilson was pictured working in the gym alongside Newcastle’s strength and conditioning coach Nick Grantham. He was also out training on the grass with the rest of the squad.
Following his return for pre-season, Wilson took to Twitter to post: “So good to be back.”
Newcastle have six friendly matches organised as it stands with room for potentially one more before they face Nottingham Forest in the Premier League opener at St James’s Park next month. They start with a behind closed doors match against neighbours Gateshead at the training ground on July 9.