Learn how your heart works during physical activity. | | | THIS WEEK'S TOP STORY | |  | | | | Stress test | | If your doctor has ordered a stress test, lace up your sneakers. See how walking on a treadmill or riding a stationary bike can help reveal heart problems. | | |
| | | | FEATURED ARTICLE | | | | | Calcium channel blockers | | These drugs can work to lower blood pressure, relieve chest pain (angina) and control an irregular heartbeat. Find out more about them, including possible side effects. | | |
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