INPUT ARTICLE: Article: This exercise will work best if you have a support bar, or foot brace, under which to hook your feet as well. You should start with an angle between 30 and 45 degrees. The higher the angle, the harder the sit ups will be. Your feet should be on the inclined (higher) side of the bench and your head should be at the declined (lower) side of the bench. Hook your legs under the foot brace or support bar. Cup your hands over your ears or hold the tips of your ears with your fingertips. Avoid placing your hands behind your neck, as this can lead to injury when the head and neck are pushed too far forward.

SUMMARY: Find an incline bench. Set the decline angle. Sit on the bench with your knees bent. Lie down so that your upper body is declined.

In one sentence, describe what the following article is about: Place the softened butter into a mixing bowl or the bowl of a stand mixer. Then, set a fine-mesh strainer over it and put 2 3/4 cups (340 g) of powdered sugar into it. Gently shake the strainer to sift the powdered sugar onto the butter. It's important to soften the butter before you make the frosting. If the butter is cold, it will make the frosting lumpy. Use a beater or paddle attachment to mix the butter and sugar together. Keep mixing until the powdered sugar is incorporated. If you don't have a hand or stand mixer, you can use a wooden spoon to mix the frosting. The buttercream should be soft and spreadable which makes it easy to use on most baked goods. If you need to make the frosting thicker, beat in about 1/4 cup (30 g) of powdered sugar to get a firmer consistency. Store leftover buttercream frosting in an airtight container in the refrigerator for up to 5 days. If you frost a cake with buttercream, you can store it at room temperature unless the cake is filled with a layer of fruit or custard filling.
Summary: Put 1 1/2 cups (340 g) of butter into a bowl and sift the powdered sugar over it. Beat the butter and powdered sugar on low for 30 seconds. Spread the simple buttercream on cupcakes, cake, or cookies.

Plug one end of your Kindle Fire's USB cable into your computer, then plug the other end of the cable into the Kindle Fire's charging port. Double-click the downloaded SuperTool ZIP folder, then click Extract at the top of the window, click Extract all in the toolbar, and click Extract. The extracted folder will open when the extraction is complete. On a Mac, just double-click the downloaded SuperTool ZIP folder and wait for it to extract. Skip this step on a Mac. To add these files to the ADB installation directory, do the following: Open the extracted folder, then open the "AmazonFire5thGenSuperTool" folder. Press Ctrl+A to select all the folders and files inside this folder, then press Ctrl+C to copy them. Go to the folder in which you installed ADB (in most cases, this will be the "C:\Program Files (x86)\Androidndroid-sdk\platform-tools" path). Paste in your copied files by pressing Ctrl+V. If you're on Windows, this is as simple as double-clicking the 1-Amazon-Fire-5th-gen file in the ADB directory. Mac users should do the following: Open the "_MACOSX" folder in the extracted SuperTool window. Open Terminal (type terminal into Spotlight, then double-click Terminal). Type in chmod 755 sh and press the spacebar. Drag the "._3-Amazon-Fire-5th-gen-linux-mac.sh" file from the "_MACOSX" folder into the Terminal window. If you don't see this file, open the "AmazonFire5thGenSuperTool" inside of the "_MACOSX" folder to find it. Press Return. Press the 2 key on your computer, then press Enter and follow any on-screen prompts. This process can take over an hour to complete. Press the 1 key on your computer, then press Enter and follow the on-screen prompts if necessary. This app will allow you to install a custom ROM onto your Kindle Fire. To do so, press the 6 key, then press Enter and follow the on-screen instructions. . Once you're done installing the various packages onto your Kindle Fire, it should be rooted; at this point, you can remove it from your computer and download the required installation files.
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One-sentence summary -- Attach the Kindle Fire to your computer. Extract the SuperTool ZIP folder. Add the SuperTool files to your Windows ADB directory. Open SuperTool. Run the "Root device" option. Run the "Google Play Store" option. Install FlashFire. Eject and remove your Android

INPUT ARTICLE: Article: An average sleep cycle lasts from 90 to 110 minutes, in a flux from light sleep to deep sleep. Consider the stages: Stage 1 is the first and shallowest stage of sleep it lasts anywhere from 5 to 10 minutes. Your eyes are closed, but it's easy to wake you up. You probably won't feel terribly refreshed if you nap for five minutes, but you shouldn't feel too groggy, either. Stage 2 is a slightly deeper stage of shallow sleep. Your heart rate slows, your body temperature drops, and you begin to sleep into deep sleep. This may last 5-10 minutes. Stage 3 is the "deep sleep" stage. If you're awoken during deep sleep, you will feel groggy and disoriented for a few minutes. Set an alarm for about 25 minutes from now: 20 minutes to sleep, and 5 minutes to fall asleep. A short "power nap" ends before your brain sleeps into deep or slow-wave sleep; you will wake feeling rejuvenated, and you shouldn't feel groggy. If you nap for longer than 20 minutes, you may slip into a deeper sleep phase and if so, you may find yourself groggier if you wake before the end of the full sleep cycle. The 20-minute power nap, sometimes called the stage 2 nap, is good for alertness and motor learning skills things like typing and playing the piano. Research shows that longer naps help boost memory and enhance creativity. When you nap for 30-60 minutes, you slip into slow-wave sleep, which is the deep phase that comes between REM "dream" sleep. A 30-60 minute nap is good for decision-making skills e.g. memorizing vocabulary or recalling directions. Be aware that you may wake up groggier, at first, if you are awoken during the deepest part of the sleep cycle. REM (rapid eye movement) sleep is the final phase of the sleep cycle; it is when dreams happen, and it is when your brain restores itself. REM sleep plays a key role in making new connections in the brain and solving creative problems. The purpose of a nap is to rejuvenate your body, so it's important that you give yourself plenty of time. Set an alarm to make sure that you stick to your desired naptime. If you want to get very precise, add several minutes to your "nap time" to allow yourself plenty of time to fall asleep.

SUMMARY:
Plan your nap to minimize grogginess. Nap for 20 minutes at a time for a quick "power nap". Nap for 30-60 minutes to slip into slow-wave sleep. Nap for 60-90 minutes to reap the benefits of REM sleep. Try not to oversleep.