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.
Harrison is also a hardcore burpee devotee. "It's a full-body exercise that will get your heart rate up, and it can be progressed and regressed in a variety of ways," she explains. (Psst—here are nine ways to do a burpee, no matter what your level is.) But her go-to burpee has a twist: "I also really love mountain climbers for some of the same reasons, so why not combine them?" The combo of the two will skyrocket your heart rate for a major cardio challenge.
“Body fat is structurally important,” explains Stefanie Mendez, R.D., co-founder of Matriarch, a women's fitness and nutrition service. “It cushions our organs and insulates our body for temperature control and also is our body’s source of energy reserves. Beyond that, fat is needed for the production of hormones and reproduction functions.” And that fat can show up in your thighs, your belly, and, yes, your upper arms. Where it goes is partly due to genetics; if your mom has arm fat, science says you have a 62 percent chance of inheriting that trait.
Even when you have the best intentions, sometimes, it can be really, really hard to drag yourself to the gym. Whether your bed or brunch plans are calling your name, sidestepping workout plans is all too easy when you’re feeling tired, stressed, and your willpower is running dangerously low. Finding the motivation to work out doesn’t have to be about getting stronger or leaner. Sometimes those are goals, and sometimes they aren't, and there are a 1,001 other amazing reasons to lace up your sneakers or unroll your yoga mat that have absolutely nothing to do with losing weight. Here are 11 of our favorites.
In case you’re curious, I’ll take a quick minute to share a little bit about who I am, my experience with struggling with my weight, what I did about it, and my purpose for helping folks all over the world do the same... I've found that what brings me the most happiness are the real people with real lives I've helped, as they email me about the success they've had using my techniques... read more

The skin also serves as a release point for heat. (See “Why Does My Face Turn Red When I Exercise?” for more on that.) When you exercise, your muscles generate a lot of heat, which you have to give up to the environment so your body temperature doesn’t get too high, Hackney says. The heat in the muscle transfers to the blood, which shuttles it to the skin; it can then escape into the atmosphere. 
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