Develop a T-shirt design that features a humorous phrase related to sports, aimed at professionals. The design should be executed in a watercolor style, with a warm color palette that includes shades of orange, red, and yellow. The phrase "Sweat is Just Fat Crying" should be prominently displayed in a bold, playful font, surrounded by watercolor illustrations of athletic elements like a stopwatch, a water bottle, and running shoes. The background should have a subtle watercolor wash that enhances the overall design without overpowering the text. This T-shirt should resonate with professionals who enjoy a lighthearted take on fitness.