Long-distance air travel puts stress on mind and body. To avoid stress and get relief from flying you need to avoid alcohol, eating only light meals and picturing yourself in a pleasant place. Sitting still for long periods can cause swollen feet and can make clothing feel tighter. Thus doctors suggest loosening clothes, removing shoes and requesting an aisle seat so you can keep strolling to the lavatory. Flexing and stretching your arms and legs during the journey helps to prevent circulation problems. To combat jet lag, seasoned travellers sometimes adjust their daily routine in advance of their journeys. Those heading east get up earlier for a week and those heading west go to bed late.