Also: The Nordic diet; Easing neck and shoulder pain.

The ideal stretching routine Image: iStock Stretching promotes flexibility and helps your joints maintain a healthy range of motion, and in doing so, also lowers the chances of joint and muscle strain. But how often should you stretch? How long should you hold a stretch? And how many times should you do each stretch? A panel of experts convened by the American College of Sports Medicine (ACSM) reviewed a wide range of studies to help answer these questions. Stretching has been studied much less rigorously than other forms of exercise, so the science is not as strong. But, based on the evidence, the panel agreed that: Get your copy of Stretching Stretching is an excellent thing you can do for your health. These simple, yet effective moves can help you limber up for sports, improve your balance and prevent falls, increase your flexibility, and even help relieve arthritis, back, and knee pain. Whether you're an armchair athlete or a sports enthusiast, this Special Health Report from the experts at Harvard Medical School will show you how to create effective stretching routines that meet your needs and ability. Healthy adults should do flexibility exercises (stretches, yoga, or tai chi) for all major muscle-tendon groups — neck, shoulders, chest, trunk, lower back, hips, legs, and ankles — at least two to three times a week. For optimal results, you should spend a total of 60 seconds on each stretching exercise. So, if you can hold a particular stretch for 15 seconds, repeating it three more times would be ideal. If you can hold the stretch for 20 seconds, two more repetitions would do the trick. To learn more about how to improve your strength and flexibility, buy Stretching, a Special Health Report from Harvard Medical School. Share this story: News and Views from the Harvard Health Blog The Nordic diet: Healthy eating with an eco-friendly bent If you've never heard of the Nordic diet, you might imagine a plate of those Swedish meatballs sold at Ikea. But in fact, this eating style focuses on healthier fare and several studies suggest following a Nordic eating pattern may foster weight loss and lower blood pressure. Calling all desk jockeys: Stretching to ease neck and shoulder pain Image: iStock Any task that encourages you to sit in one position for long hours can wreak havoc on posture. Even enjoyable hours whiled away with an e-reader or a tablet may have that effect — and worse. A study from the Harvard T.H. Chan School of Public Health, Brigham and Women's Hospital, and Microsoft showed that holding a tablet too low in your lap can force the muscles and bones in the neck into an unnatural posture, which may strain or aggravate other muscles, nerves, tendons, ligaments, and spinal discs. Over time, poor posture chips away at the range of motion in your joints. The neck problems described in the study above — and repetitive stress injuries from tasks such as typing — may occur, too. Fortunately, good ergonomics and regular posture checks can help combat these problems. Ergonomics for computers, phones, and tablets If you use a laptop or desktop computer: Choose a chair with good lumbar support, or place a pillow against the small of your back. Position the top of your monitor so it's just below eye level. Sit up straight with your head level, not bent forward. Keep your shoulders relaxed and your elbows close to your body. Keep hands, wrists, forearms, and thighs parallel to the floor. If you use a handheld phone: Avoid propping the phone between your head and shoulder. Consider investing in a comfortable, hands-free headset. Depending on your needs, you can choose one designed for use with cordless phones, landlines, or computers. If you use an e-reader or tablet: Buy a case that allows you to prop the device at a comfortable viewing angle, one that doesn't require you to bend your neck much. Change things up every few minutes. "Usually we tell people they should change their position every 15 minutes," says Dr. Jack Dennerlein, principal investigator of the tablet study and an adjunct professor or ergonomics and safety at the Harvard T.H. Chan School of Public Health. "Just change your hands, shift your weight. Stand up or sit down." For more ways to relieve tight, stiff muscles and improve your posture, buy Stretching, a Special Health Report from Harvard Medical School. Share this story: Featured in this issue Stretching Featured content: • Stretching: The basics • Safety first • Stretching to ease pain • Six questions (and answers) about stretching exercises • SPECIAL SECTION: Warming up for sports with dynamic stretches •  ... and more! Click here to read more » Harvard Medical School offers special reports on over 50 health topics. Visit our website at http://www.health.harvard.edu to find reports of interest to you and your family. PHONE ORDERS - please call our toll-free number: 1-877-649-9457. You are currently subscribed to HEALTHbeat as dr.samah.saied.ahmed@gmail.com. UNSUBSCRIBE SUBSCRIBE TO HEALTHbeat VIEW HEALTHbeat ARCHIVES PRIVACY POLICY Visit our website at: www.health.harvard.edu Email us at: healthbeat@health.harvard.edu FOLLOW US ON:  Facebook Twitter Copyright © 2015 by Harvard University. Harvard Health Publications, 10 Shattuck Street, 2nd Floor, Boston, MA 02115, USA * Please note, we do not provide responses to personal medical concerns, nor can we supply related medical information other than what is available in our print products or website. For specific, personalized medical advice we encourage you to contact your physician.