“…However, research studies support a greater potential of developing DVT in-flight because of decreased air pressure, decreased oxygen, lower humidity, restricted movement, and cramped seating if employees have predisposing risk factors. Predisposing risk factors linked to DVT include obesity, chronic heart disease, diabetes, hormone replacement therapy, cancer, previous DVT history, and pregnancy (Tompkins et al, 2005a). To alleviate muscle fatigue and prevent DVT, employees should do simple exercises (i.e., ankle circles, foot pumps, knee lifts, knees to chest, shoulder rolls, neck rolls, and forward flexing) when sitting is required during flight (Ball, 2003).…”