You don't necessarily have to exercise to feel rejuvenated. Just stretching may do the trick. Grab the top (or sides) of a door frame and push your chest forward. Hold it for 30 seconds. Stretching out your core will bring more blood to your brain, energizing you. If you're stuck at your desk, make it a point to get up regularly. This is an instance where your brain needs different stimulation to wake up. So get up off your chair, walk around, grab some water, and you may be able to hop back to it. Exercising is one of the most common ways to get energy flowing within you again.  Though it may seem like the last thing you want to do right now, once you get out there, you'll feel better.  If you don't have enough energy to go out and exercise, do something small like jumping jacks, knee lifts, a few push-ups, or whatever suits you.  Or just go for a walk.  Getting outside, getting some fresh air, and moving around will do you good. Though it may the hardest to do, exercising in the morning can charge you for the entire day. A messy desk, kitchen, or home can be a serious drag. You may not realize it, but just being in that environment could wear you down. Even if it just means throwing a few papers into a folder, do it. One little step often leads to much bigger ones. Imagine how good it'll feel to come home or to work to a clean space. You'll be happier to be where you and get energized just by being somewhere with such good chi. Even just a 15-minute effort can help you start seeing improvements. Vitamin D can be found in supplements, but it's not really found in your diet. With a vitamin D deficiency, you'll feel lethargic and lazy. To get this nutrient, you'll need to get some much-needed sunlight. Throw open the windows or go walk the dog. This is why areas that are wintery 24-7 have higher rates of Seasonal Affective Disorder. People become sadder and more withdrawn when there's no sunlight. If you live in an area that gets very little sun, or you work indoors all the time, consider getting a sun lamp...

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Write a summary of the previous text in Indonesian:
Regangkan tubuh. Olahraga. Mulailah beres-beres. Pergilah ke alam terbuka untuk mendapat vitamin D. Setel musik yang khusus membuat Anda senang.