A strain refers to the stretching or tearing of a muscle or tendon as a result of excessive pulling during physical activity. Tendons are bands of tissue that connect muscles to bones.
What are the causes and risks of the injury?
Most strains are caused by excessive physical activity. Some common causes of strains include the following:
motor vehicle accidents
obesity or overweight
overstretching, such as during an exercise warm-up session
running on an uneven surface
work-related injuries, such as lifting injuries and repetitive stress injuries