Please analyze the tweet "I walked 3.4 miles today, the most I've walked since I got #rhabdo. Going back to work tomorrow.. here's to hoping it goes okay" and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".
anticipation, fear, joy, optimism, trust