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How To: Do barbell squats

Squats are probably the most useful exercise you can do at the gym—no other single exercise encourages more muscle growth. With a range of motion that incorporates many different muscle groups in the legs, core and upper body, squats strengthen not only those muscles, but also the tendons and ligaments that connect them. In addition to their strength-building benefits, squats also teach you core stabilization, which is important for almost any athletic endeavor. Learn how to do barbell squats...

How To: Calculate your BMI with a formula

Knowing your BMI, or Body Mass Index, is a great way to see if you are at a healthy weight. In this simple and short video provided by Children's Hospital Boston, you will figure out how to calculate your BMI by taking your weight (in pounds) and multiplying it by the number 703 and then dividing it by your height (in inches) squared.

How To: Do a decline bench press

Watch this instructional fitness video to do a decline bench press weight lifting exercise. Keep your back straight and your body in a controlled position. Exhale as you lift the weights up and inhale on the way down. This decline bench press exercise works the chest muscles.

How To: Do flys to strengthen your chest

Watch this instructional fitness video to do chest fly weight lifting exercise. Keep your back straight and your body in a controlled position. Exhale as you lift the weights up and inhale on the way down. This chest fly exercise works the chest muscles and anterior deltoid.

How To: Do a military press

Watch this instructional fitness video to do a military press weight lifting exercise. It's very important to use a spotter for this exercise. Keep your back straight and your body in a controlled position. Exhale as you lift the weights up and inhale on the way down. This military press exercise works the shoulders.

How To: Do one arm seated row exercises

Watch this instructional fitness video to do a one arm seated row weight lifting exercise. Keep your back straight and your body in a controlled position. Exhale as you lift the weights up and inhale on the way down. This one arm seated row exercise works the back, back of the shoulders and biceps.

How To: Do a rear lateral raise shoulder exercise

Watch this instructional fitness video to do a a rear lateral raise weight lifting exercise. Keep your back straight and your body in a controlled position. Exhale as you lift the weights up and inhale on the way down. This rear lateral raise shoulder exercise works the posterior deltoids.

How To: Build up strength with dumbbell chest flies

Dumbbell chest flies or butterfly exercises are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do chest flies with weights. Make sure your feet are flat on the ground and shoulder blades are pushed back together before bringing the dumbbells close to your chest. Keep watching to learn more about proper form for doing dumbbell butterfly exercises.

How To: Strength train with incline dumbbell presses

Incline dumbbell presses are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do dumbbell presses on a bench that is on an incline. Make sure your feet are flat on the ground and shoulder blades are pushed back together before bringing the weights close to your chest. Keep watching to learn more about proper form for doing dumbbell presses on an a bench that is on an angle.

How To: Strength train with cable biceps curls

Cable biceps curls are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do biceps curls with a cable machine. Start the curl with straight arms and curl the weight up toward your body. Keep watching to learn more about proper form for doing cable bicep curls.

How To: Do biceps hammer curls with dumbbells

Dumbbell hammer curls are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do hammer curls with dumbbells. Begin placing your feet shoulder width apart and proceed to curl the bar up to your body without twisting or moving the weights. Keep watching to learn more about proper form for doing dumbbell hammer curls.

How To: Strength train with dumbbell biceps curls

Dumbbell biceps curls are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do biceps curls with dumbbells. Begin placing your feet shoulder width apart and proceed to curl the weights up to your body as you twist them. Keep watching to learn more about proper form for doing dumbbell bicep curls.

How To: Do an Arnold shoulder press for with dumbbells

These shoulder presses are named after Arnold Swarchenegger. Presses are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do Arnold presses with dumbbells. Begin the presses by placing the weights at in front of your chin and pushing them up above your head. Keep watching to learn more about proper form for doing Arnold shoulder presses.

How To: Practice proper form for dumbbell shoulder press

Dumbbell shoulder presses are an important part of strength training and weight lifting. This fitness HowTo video tutorial shows you the proper way to do shoulder presses with dumbbells. Begin the presses by placing the weights at shoulder height and pushing them up above your head. Keep watching to learn more about proper form for doing dumbbell shoulder presses.

How To: Give your cigarette lighter a huge boost

This is a video tutorial about how to boost your cigarette lighter and get a much bigger flame. This is great for playing a joke or prank on a friend, or maybe you just need a bigger flame. You know what they say, "the bigger your flame, the bigger your..." Watch this how-to video and modify a lighter to get a tall flame.

How To: Calculate weight average atomic mass of an element

In Chemistry weight of some elements are measure in the form of Average Atomic Mass. Isotopes are found in different abundances in nature. Certain elements have many isotopes and certain elements have few isotopes. Regardless of the number of the natural isotopes, the weighted average mass takes into consideration not only the mass of each isotope, but what also its natural abundance in terms of percent as found in the nature. So when you have the mass of two isotopes of an element and are gi...