<unk>  is key for many people with heart disease or back pain, and a variety of specific<unk>  techniques are available for both groups. In individuals with heart failure and normal EF (ejection fraction), including aortic distensibility, blood pressure, LV diastolic compliance and skeletal muscle function, aerobic<unk>  has the potential to improve<unk>  tolerance. A variety of pharmacological interventions such as verapamil, enalapril, angiotensin receptor antagonism, and aldosterone antagonism could potentially improve<unk>  tolerance in these individuals as well. Research on individuals suffering from Chronic obstructive pulmonary disease (COPD), has found a number of effective therapies in relation to<unk> . These include: # Oxygen supplementation #* Reduces carotid body drive and slows respiration at a given level of<unk> . # Treatment with bronchodilators #* Clinically useful improvements in expiratory airflow, allows fuller exhalation in a given period of time, reduces dynamic hyperinflation, and prolongs<unk>  tolerance. # Heliox (79% Helium, 21% oxygen) #* Heliox has a lower density than air. #* Breathing heliox lowers expiratory airflow resistance, decreases dynamic hyperinflation, and prolongs<unk>  tolerance. # High intensity rehabilitative<unk>  training #* Increasing the fitness of muscles decreases the amount of lactic acid released at any given level of<unk> . #* Since lactic acid stimulates respiration, after rehabilitative training<unk> ng, ventilation is lower, respiration is slowed, and dynamic hyperinflation is reduced. A combination of these therapies (Combined therapies), have shown the potential to improve<unk>  tolerance as well. Hazards Certain conditions exist where<unk>  may be contraindicated or should be performed under the direction of an experienced and licensed medical professional acting within his or her scope of practice. These conditions include: * Decompensated heart failure * Recent myocardial infarction * Hypertrophic cardiomyopathy or cardiomyopathy from recent myocarditis * Active or suspected myocarditis or pericarditis * Low left-ventricular ejection fraction (LVEF) * Severe aortic stenosis * Unstable ischemia * Unstable arrythmia * Irregular or resting pulse greater than 100 bpm * Resting systolic blood pressure >200 mm Hg or resting diastolic blood pressure >110 mm Hg * Severe pulmonary hypertension * Chronic fatigue syndrome * Suspected or known dissecting aortic aneurysm * Recent systemic or pulmonary embolus * Pneumothorax and haemoptysis * Thrombophlebitis The above list does not include all potential contraindications or precautions to<unk> . Although it has not been shown to promote improved muscle strength, passive range-of-motion<unk>  is sometimes used to prevent skin breakdown and prevent contractures in patients unable to safely self-power.
Exercise intolerance
Paroxysmal nocturnal dyspnoea
Heat intolerance
Alarm fatigue
Palpitations
Platypnea
Myxedema
Tachypnea