Sore muscles after physical activity, known as delayed onset muscle soreness (DOMS), can occur when you start a
new exercise program, change your exercise routine, or increase the duration or intensity of your regular workout.
Delayed onset muscle soreness (DOMS) is the pain and stiffness
felt in muscles several hours to days after unaccustomed or strenuous exercise. The soreness is
felt most strongly 24 to
72 hours after the exercise.