It typically takes a few days for someone to recover from a grade 1 pectoralis or chest muscle pull, according to EXOS. Early icing and proper rest helps. However, more severe pulls can require much longer and more intensive treatment and recovery efforts.
A grade 2 chest muscle pull involves more fiber tears and loss of strength. With this type of pull, recovery can range anywhere from two to six weeks, according to EXOS. A grade 3 pull or strain is most severe. Though rare, they are very painful and debilitating. Surgery is normally required to repair torn muscles, and the recovery normally takes months. Often, people never regain full strength.