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If you have a cardiacchronicchronologicallong-term chronic disease - such as heart disease, diabetes, asthma, or back or joint pain - exercise can have important health benefitschangesdevelopmenteffects benefits . However, it's important to talk to your doctor before starting an exercise routine. He or she might have advisedadviceprescriptionstruth advice on what exercises are safe and any precautions you might need to take while exercising.