Exercise should not use the word fit, because everyone's body energy is different! It is normal for your arm to be sore. After four to five days, you won't feel so sore! In fact, sports don't necessarily require much equipment, just like yourself! You can lift dumbbells, push-ups, sit-ups, jump rope and run! You can do this every day without too much exercise. I just want to do my best today! You may feel a little tired at the beginning of the next day, but after a long time, you will find that exercise makes people more energetic and energetic! Spend the summer, it's time to show your lines! Persistence is the key, Rome was not built in a day! Stick to it, and you will like this feeling of muscle ache! It's my own personal experience, and I hope I can help you who love fitness!