Adjustable height desks allow the user to select a working position that is ideal for their body. Employees who alternate between a sitting and standing positions will have more energy, experience reduced fatigue levels, and reduce their risk of injury caused by working in one body position too long. Whereas, non-adjustable height desks, user/employees should have frequent breaks in between for at least 20-30 minutes by standing or doing stretches. This will help to reduce or avoid muscle strains and back pain due to prolong sitting.