In one sentence, describe what the following article is about: At least twice a week you need to start running in intervals to train your body for speed. While distance running with help you with your heart and lungs, it won't necessarily make you faster.  400-meter sprint intervals. Do six intervals of 400-meters, resting for 1 minute between each sprint. Start at a decent pace and increase it with each interval. 600-meter sprint intervals. Now run six to eight intervals at a distance of 600-meters, resting for 1-2 minutes in between each repetition. Alternate these interval sprints and perform them on days you are not going on distance runs. Hill running is a great way to build strength and increase your endurance. Look for a hill that will take you several minutes to reach the top of so that you can ensure that you're actually building muscle.  Begin your hill climb at a nice jogging pace, especially at the beginning of your training. Once you've run about ¾ the way up the hill, sprint the remaining ¼. Repeat this run at least three times. Walk down the hill at a nice pace to recover from your climb, using this as your resting time. Don't strain your body by doing too many hill climbs a week. Substitute one or two of your sprint intervals for hill climbs. Not only will marking your progress help you to see how you're improving, but it will also motivate you to keep pushing yourself. You will be able to see areas where you might not be improving as quickly as you want to.  Get a runner's watch or use an app on your phone to track your times and mileage. Write down your distances and times in your training schedule after you have completed them. This way, you can easily see your progress as you train.
Summary: Perform sprint intervals. Run hills. Mark your progress.

In one sentence, describe what the following article is about: There is no clear scientific data that shows eye exercises improve your eyesight. So before you attempt eye exercises, it's a good idea to get a professional eye exam done by your optometrist. Your optometrist can then tell you if you have any existing eye problems or issues. Before you try eye exercises, you should ask your optometrist if these exercises would benefit your particular set of eyes.  Keep in mind that eye exercises will not cure or solve eye issues like myopia (nearsightedness), presbyopia (an inability to change focus from far to near), or astigmatism (blurred vision due to the shape of your cornea). Most optometrists are skeptical of eye exercises that claim they can help you "throw away your glasses."  There is no harm in trying these eye exercises if you do not have any eye conditions that will be aggravated by prolonged use of your eyes. But if you have serious eye conditions like cataracts, blindness in one or both eyes, or a recovering cornea injury, avoid doing these exercises.
Summary: Talk to your optometrist about eye exercises.

In one sentence, describe what the following article is about: The first thing that you'll need in order to survive in the woods is water that you can drink. Look for signs of fresh water nearby like areas of green foliage that indicate water is nearby, low-lying areas where water could be collected, and signs of wildlife like animal tracks. It could mean that a creek, stream, or pond is nearby. While finding water is important for survival, be aware some water sources will not be safe - if possible treat all drinking water before using it.   If there are mountains nearby, look for water collected at the foot of the cliffs. The presence of insects like mosquitoes and flies means that water is nearby. Water from heavily oxygenated water (such as from a big waterfall or rapids) typically is safer than that from a slow or still water source. Freshwater springs are typically safer water sources, although these can be contaminated by mineral or bacteria as well. Remember that all untreated water must be considered risky unless treated. Even crystal clear water can harbor diseases and be dangerous if consumed. Rainwater is one of the easiest and safest ways to hydrate yourself in the woods. If it starts to rain, place any containers that you have out in the rain to collect it. If you have a tarp or a poncho, hang it at least 3–4 feet (0.91–1.22 m) off of the ground by tying the corners to trees, and place a small rock in the center to create a depression that will collect the water.  Don't let the water sit in a container or a tarp for too long or it can stagnate and bacteria can contaminate it. If possible, purify any water that you collect. Use a rag, cloth, shirt, sock, or any other item of clothing that's made out of absorbent material like cotton to capture morning dew. Find a clearing or a meadow with tall grasses and place the cloth on top of the grass to pick up the dew. Move the cloth around in the grass until it's saturated, then wring out the water, collecting it in a container.  You can collect the most dew just before sunrise. Be careful not to collect dew from poisonous plants. Grasses are your safest bet. You may be able to find fresh water simply by digging a hole deep enough to reach the water table or the level at which the ground is saturated with water. Use a shovel or a sturdy stick to dig down until you reach water. Make the hole wide enough so you can easily scoop water from the hole. Wait until the mud settles down at the bottom of the hole and the water clears before you scoop it out. If you find ice or snow on the ground in the woods, collect it so you can melt it down for fresh drinking water. You can place the ice or snow in a container and place it next to a fire to melt it or you can hold the container to use your body heat to melt it.  Melting snow is an inefficient way to obtain water. Although it is a relatively safe and easily identifiable source of water, it is not a lot of water by volume. Melting a pot of snow will yield only about a third of a pot of water. A lot of fuel and effort may be wasted if there is a better source available. Collect snow or ice that has a bluish tint to it. Frozen water that is gray or opaque will have a high concentration of salt, which can dehydrate you even more if you drink it. any water that you find. It's extremely important that you purify any water that you collect, including rainwater, dew, and ice or snow, so you don't consume bacteria that could make you ill or even kill you. Use a piece of cloth or clothing to strain the water to remove large particles, then boil the water for 10 minutes to kill any contaminants.  If you don't have a container to boil water in, you can fill a clear plastic bottle with water, seal the lid, and place the bottle on its side in direct sunlight for 6 hours to purify it. In the event that you have no containers and no way to purify water, you can dig a deep hole, let it fill with groundwater, and wait for the particles to settle at the bottom and the water is clear before you drink it. You should only do this if you have no other option.
Summary:
Search for a source of fresh water. Collect rainwater to drink. Absorb morning dew with a piece of cloth. Dig a hole to find fresh water. Melt snow or ice if you can find some. Purify