Jumping on the treadmill or cross trainer for 30 minutes can blow off tension by increasing levels of "soothing" brain chemicals like serotonin, dopamine, and norepinephrine. What's fascinating, though, is that exercise may actually work on a cellular level to reverse stress's toll on our aging process, according to a 2010 study from the University of California—San Francisco. The researchers found that stressed-out women who exercised vigorously for an average of 45 minutes over a three-day period had cells that showed fewer signs of aging compared to women who were stressed and inactive. Working out also helps keep us from ruminating "by altering blood flow to those areas in the brain involved in triggering us to relive these stressful thoughts again and again," says study coauthor Elissa Epel, an associate professor of psychiatry at UCSF.
Those buff lab rats might be smarter than we think. Various studies on mice and men have shown that cardiovascular exercise can create new brain cells (aka neurogenesis) and improve overall brain performance Aerobic exercise is the critical variable in an enriched environment that increases hippocampal neurogenesis and water maze learning in male C57BL/6J mice. Mustroph ML, Chen S, Desai SC, Cay EB, DeYoung EK, Rhodes JS. Neuroscience Program, The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA. Neuroscience. 2012 September 6;219:62-71. Aerobic exercise improves hippocampal function and increases BDNF in the serum of young adult males. Griffin EW, Mullally S, Foley C, Warmington SA, O’Mara SM, Kelly AM. Department of Physiology, School of Medicine, University of Dublin, Trinity College, Dublin, Ireland. Physiology & Behavior. 2011 October 24;104(5):934-41.. Ready to apply for a Nobel Prize? Studies suggest that a tough workout increases levels of a brain-derived protein (known as BDNF) in the body, believed to help with decision making, higher thinking, and learning. Smarty (spandex) pants, indeed.
Stand with your feet placed shoulder width apart and arms extend straight to your sides, raised at shoulder height. Now, do 50 small circles with your hands by rotating them in the forward direction. Then switch to 50 small backward circles. The backward and forward arm movement tones all the muscles of the arms including the triceps, biceps, shoulders and back muscles as well.

Getting your workout in can also improve your sleep. In one study of 2,600 subjects, people who exercised at least 150 minutes a week reported a 65 percent improvement in sleep quality as well as better energy levels during the day, according to the National Sleep Foundation. And there's nothing more heavenly than a solid night of sleep (and nothing more rewarding after a tough workout during the day).

You can also pair this workout with weight lifting in the gym to really work on building muscle. Some great arm toning exercises are simple exercises like triceps dips, pull-ups, and biceps curls. You can learn how to do these in our article on how to get cut arms. You can even do some rowing to get an intense workout for all of your arm muscles. If you want to take cardio up a notch to shed arm fat faster, check out our fat loss workout video that will get you on your way to getting shredded.
Use small weights to do weighted punches. Pick up a small, 1 or 2 pound weight in each hand and stand with your feet hip-width apart. Bring your hands up in front of your face with your palms facing each other. Punch your right fist forward without locking your arm, then quickly pull it back as you shoot your left fist upward. Alternate the exercise this way for 60 seconds, as fast as you can.[5]
You've cut your cancer risk. In a study of more than 14,800 women, those who had the highest levels of aerobic fitness were 55 percent less likely to die from breast cancer than those who were sedentary. Women considered moderately fit had about a 33 percent lower risk of developing the disease. Exercise may also help protect against endometrial, lung, and ovarian cancer, researchers say.

FIT TIP: If you exercised on an empty or almost-empty stomach, you're probably feeling light-headed or even nauseated or headachy. Your immediate food fix: A high-carb nosh, like a banana or half a bagel, will refuel you and kick-start your recovery. And don't forget to drink plenty of water with your snack. Intense or long workouts can leave you dehydrated.
When stress isn't just stress, exercise can work wonders, too. There's a host of research proving that people with anxiety and depression can find major help in working out. According to the Anxiety and Depression Association of America, regular exercise has been found to help with various anxiety disorders, including panic disorder and OCD. Celebrities, including Lena Dunham, have talked about about how a regular exercise program has helped with her anxiety.
Sit on the floor with your legs and feet joined together, knees bent and feet placed flat on the floor. Place your hands on the floor about a foot behind your hips, palms kept shoulder-width apart and fingers pointing towards your back. Now, raise your hips off the floor by straightening your arms. Bend your right elbow to lower your hips as close to the floor as possible, without touching it. Straighten your right arms and bend your left elbow to again lower your hips as close to the floor as possible. Repeat on alternate sides.
HOW TO DO IT: Start in a high plank with your hands underneath your shoulders. Jump your feet outside your hands and drop into a deep squat position, pushing your knees out and keeping your feels flat on the floor while prying your chest open with your hands. Return to the starting position and repeat. For an added challenge, try moving both forward and backward.
Before we look at what we can do for reducing arm fat, let’s be sure to understand the most common misconception about weight loss that is still floating around out there: spot-reducing. Science says you can’t spot reduce body fat. That means you can’t pick a spot on your body and exercise the fat away. You see, you store fat cells all over your body. Where your fat cells happen to be more concentrated is often a genetic predisposition. Having more fat on your arms doesn’t mean you can lose the fat directly from your arms alone. It means you have to first lose body fat all over, and then work on specifically strengthening your arms to tone them the way you wish.

HOW TO DO IT: Start with your weight on your right leg with your knee bent. Bent your left knee so your foot is slightly off the ground. Push off your right leg and jump to your left, landing softly and holding that position for a one-count, keeping your hips back and down throughout. Reverse the movement and repeat, gradually increasing your speed and range of motion.
HOW TO DO IT: Start in a bent-knee push-up position with your palms underneath your shoulders and knees bent at 90-degrees. Kick your right leg in front of you and assume a one-arm, one-leg hip bridge. Hold for one count, then reverse the movement and repeat on the other side. Move at a slower, more-controlled pace if it’s difficult, or even try a modified version called “sit-throughs,” where you sit on the outside of your hip as you move to each side.
After ingestion, carbs are converted into glucose and burned for fuel or stored as glycogen in the liver and muscles for later use. According to the European Journal of Applied Physiology, each gram of glycogen stored in the muscles holds at least 3 grams of water. The more carbs you eat, the more water you'll hold, which can make your arms look fuller.
HOW TO DO IT: Start in a high plank with your hands underneath your shoulders. Jump your feet outside your hands and drop into a deep squat position, pushing your knees out and keeping your feels flat on the floor while prying your chest open with your hands. Return to the starting position and repeat. For an added challenge, try moving both forward and backward.
Endorphins are hormones in the brain associated with a happy, positive feeling. A low level of endorphins is associated with depression. During exercise, plasma levels of this substance increase. This may help to ease symptoms of depression. A recent National Health and Nutrition survey found that physically active people were half as likely to be depressed.
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