Can a lack of exercise cause chest pain?

 Yes. Chest pain can be caused by a lack of exercise because when you're inactive, your body's ability to use oxygen efficiently decreases. This decrease in efficiency can lead to the development of angina, which is chest pain that is caused by a lack of blood flow to the heart muscle.

Additionally, a lack of exercise can lead to a condition called obesity, which is a major risk factor for heart disease. Obesity occurs when you eat more calories than your body burns, and it's been shown that people who are obese are at increased risk for developing coronary artery disease (CAD), which is the most common type of heart disease.