After graduating, Christopher has undergone a complete change physically with a drastic weight loss. According to an insider, Arnold himself is helping his son achieve the fitness milestones and be in a good shape. The insider further revealed that Christopher decided to opt for a healthy lifestyle and stick to it. The 22-year old is not on some trendy diet but is keeping check of his intakes and is keeping it as healthy as possible. Talking about the same, the source revealed, “It is not any kind of fad diet or crash diet, he just cut out the junk and started working out.” Christopher’s drastic weight loss was noticed by Arnold’s fans and they made the pictures of him heading out of a food store wearing a loose t-shirt viral on social media. He looked very much leaner than the olden times. The source concluded by saying that Arnold is putting no pressure on Christopher, instead he is happy to have been able to share his passion with his son. Actually, it is doing wonders for their father-son bonding.