SpongeBob notices that he is weak compared to Sandy and she offers to give him exercise training. After failing at it, SpongeBob goes home with painful arms. He lies in his arm, when a commercial on TV starts. Donald the Shark tells the audience why to buy the product. SpongeBob is then convinced and buys some. He goes to Goo Lagoon to show off his fake muscles. He convinces everyone, including Sandy. Thinking that he is really strong, she signs them up for an Anchor Toss competition. When it is SpongeBob's turn to go, the Anchor Arms start to broke down due to SpongeBob overinflated them while straining to lift the anchor. Eventually, they explode and deflate, revealing that the muscles are just fake.