Fig. 1From: Measuring Dyspnea and Perceived Exertion in Healthy Adults and with Respiratory Disease: New Pictorial ScalesDalhousie Dyspnea and Perceived Exertion Scales. Each scale depicts specific construct with severity increasing from left to right. The top row depicts breathing effort; the second set of pictures depict the construct of chest constriction or tightness; the third row throat narrowing; whereas the bottom row depicts the perceived exertion scale (for predominantly leg exercise)Back to article page