To diagnose a problem with the port, try using a different battery and cord for a while. Damaged Power Cord. The power cord is a wire inside a plastic sheath, and the wire can break with or without damage to the sheath. If the power goes on and off as the cord is moved or bent, the wire is likely broken.
You can work out if you're sore. Don't exercise the same muscle groups that are hurting. Do legs one day and exercise your upper body the next. By doing so, you'll still be able to get exercise and allow your lower body to recover and rebuild.
If you want to get a jump on alleviating sore muscles after a workout, look to your vitamin bottles before reaching for medications. Vitamins are necessary for building healthy cells and tissue, so it makes sense that they would be helpful with mending and healing muscle tissue once it has been broken down by a good, aggressive workout.