They may be consumed up to the use by date. Unopened deli meats generally keep for two weeks. However, once the package is opened, the use by date is meaningless; the meat should be consumed within 3-5 days. This is because anti-oxidative gases that preserve pre-packaged deli meats escape from the packaging once it is opened. Unopened packaged deli meat can be frozen for one to two months.
Chest soreness that is caused by working out used to be attributed largely to the buildup of lactic acid, which is a waste product created by the muscles when strained.
The pectoralis muscles are the largest muscles on the chest wall but there are several other muscle pairs present. These muscles can be easily strained with exertion. Chest wall injury is more likely to lead to a bruised feeling or even a stabbing sensation rather than a squeezing chest pain. However, chest wall problems should be considered when there is superficial pain (pain on the surface). Angina. Angina pectoris is heart-related chest pain caused by insufficient blood supply to the heart muscle.