The goal of this study is to determine if manual therapy can improve thoracic spinal posture and pulse oximetery in individuals who use e-cigarettes. The main questions the study aims to answer are: * Is there an immediate improvements in thoracic posture * Is there immediate improvements in pulse oximetery Research will compare an experimental group and a control group to examine the effects.
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Angle of Thoracic Kyphosis
Timeframe: Immediately before and after each intervention