A Monday morning training session must be difficult after coming up against man-mountain Romelu Lukaku. You'd struggle to walk never mind train.
When he's on form, the Belgian striker is as physical as they come. Strong, pacey and a menace for any defender, but the striker has struggled in recent weeks, struggling to find the net in all competitions.
The fact that Danny Welbeck has scored more goals than Lukaku this season, despite the Belgian playing over 700 minutes more, proves that point.
Lukaku has also been slated for his physical state in recent weeks, with some saying he is too muscly.
Manchester United fans are of the impression that the player has been hitting the weights too hard, and reckon he needs to lean up ahead of the rest of the 2018/19 campaign.
In addition, a certain quote from last year has emerged on social media.
Before a Premier League game against Stoke City last year, Lukaku and Marcus Rashford spoke to BT Sport about shooting practice and the Belgian revealed that the pair face a punishment for missing chances on the training ground:
"Every day we do a finishing drill where every time we don't hit the target we do press-ups - only the two of us." Lukaku said in an interview with BT Sport.
Shortly after the quotes emerged, Twitter user @ made up a theory about these 'training ground press ups' and it did the rounds on social media.
It all began when another Twitter user, Rahul Singh, tweeted the quote out to his followers:
@ quoted the tweet and captioned: "No wonder he's absolutely huge..."
Lukaku missed a sitter during that Stoke game, when he fired over the bar in the second half - a chance that could have won Manchester United the game.
After the Stoke game, Manchester United teammate Ander Herrera summed up the striker's influence perfectly, something he is currently missing from his game.
"He is so hungry, he wants to win things, he wants to score goals and he wants to be important." Herrera told Manchester United's official website.
"It doesn't matter that he hasn't played Champions League before, he has scored goals and played in the best league in the world so he will score goals for us."