A new study from her lab shows that a 20-minute moderate workout has measurable effects on the immune system: Participants were asked to walk or jog on a treadmill, depending on their fitness level. They measured levels of TNF, an inflammatory marker, before and after the exercise, and found that there was a 5% reduction in the number of immune cells that produced the marker.
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.
Essentially, circuit weight training, or circuit bodyweight training, burns more calories than interval training, and that in turn burns WAY more calories than steady cardio. When you strength train, you burn calories. Then, your body needs to spend hours and hours afterwards rebuilding your muscles, which in turns burns even more calories (they call this the ‘afterburn effect).
The benefits of exercise diminish within weeks after a person stops exercising. Heart strength, muscle strength, and the level of HDL cholesterol decrease, whereas blood pressure and body fat increase. Even former athletes who stop exercising do not retain measurable long-term benefits. However, people who were physically active in the past often can regain fitness faster.
Lie on your back with the knees bent and feet flat on the floor, approximately hip-width distance apart. Lift the left leg up so that the leg is straight and the thighs are parallel. As you exhale, keep the core engaged and lift the hips off the floor. Hold for one to two seconds, and slowly lower down to starting position. Complete 10 to 12 reps on the right side before switching to the left.
Most gymgoers who are struggling with flabby arms either spend hours on the treadmill or work their biceps day in, day out. What you should focus on are the triceps because this muscle makes up two-thirds of your arm. Train it once or twice per week to lose arm fat and build upper-body strength. Your arms might get bigger, but they'll look leaner and more defined.
Slogging through a few miles on the ‘mill can be tough, but it’s worth the effort! Exercise releases endorphins, which create feelings of happiness and euphoria. Studies have shown that exercise can even alleviate symptoms among the clinically depressed The benefits of exercise for the clinically depressed. Craft LL, Perna FM. Division of Psychiatry, Boston University School of Medicine, Boston, MA, USA. Primary Care Companionto the Journal of Clinical Psychiatry. 2004;6(3):104-111.. For this reason, docs recommend that people suffering from depression or anxiety (or those who are just feeling blue) pencil in plenty of gym time. In some cases, exercise can be just as effective as antidepressant pills in treating depression. Don’t worry if you’re not exactly the gym rat type — getting a happy buzz from working out for just 30 minutes a few times a week can instantly boost overall mood.
If you’re trying to lose weight, you may strive for sculpted, toned arms with no flab or jiggling. Reducing fat in your arms as a woman means doing arm strengthening exercises, trying sports or activities that help to build arm muscles, and maintaining a healthy diet. Most women carry extra weight in their hips and midsection. Toning your arms should not be too difficult with focused exercises, especially if you are trying to shed pounds off your total body weight.[1] Keep in mind that it is not possible to lose weight in just 1 region of your body, but with diet and exercise, you should be able to lose weight all over and reduce the size of your arms.

HOW TO DO IT: Assume a wide sumo stance with your feet farther than shoulder-width apart and your toes pointed out slightly. Drop your weight into your heels and lower your hips until your palms reach the box without rounding your lower back. Jump your feet back into a plank. Reverse the movement and repeat for 30 to 60 seconds. Add height to the box if the movement is too difficult.
Scientists don’t know exactly why exercise changes the structure and function of the brain, but it’s an area of active research. So far, they’ve found that exercise improves blood flow to the brain, feeding the growth of new blood vessels and even new brain cells, thanks to the protein BDNF (brain-derived neurotrophic factor). BDNF triggers the growth of new neurons and helps repair and protect brain cells from degeneration. It may also help people focus, according to recent research.
If you're ready to move on from classic Bulgarian split squats, Swan's amped-up variation gets your upper body in on the action for a true total-body exercise. "This combination move works your legs, butt, chest, back, arms, and core," she says. "And it not only hits all the major muscle groups—it also lets you work on balance." Give it a shot and you'll see why.
×