Hyperexpanded lungs occur when the air sacs of the lungs break down and become enlarged. This affects the lungs’ ability to take in new air, making it difficult to breathe, particularly when you exhale.

While exercise can't change your genetics, you can get a curvier backside by building muscle with targeted spot-specific exercises. Butt workouts help you achieve a rounded, toned shape, adding bulk just where you want it for a back view that works in jeans or a bikini.

Strengthening the inner knee muscles aid in preventing knee injury and also helps create a shapely set of legs. Weakness in the vastus medialis obliquus, VMO, in particular can lead to patellar maltracking and potential patellofemoral pain syndrome which causes knee pain and a subsequent decline in physical activity.

Many women who exercise do so with the goal of having a slimmer or flatter backside. Lifting, slimming and firming the glute muscles has also become the focus of many men. If your goal is to have a flatter, firmer butt, there are a variety of exercises that can help you get there.

The lighter you are, the less weight your muscles have to propel in a jump -- so yes, losing body fat will make jumping easier. But that's not the only way you can, or should, increase your jumping power.

Adhesive capsulitis is a condition characterized by pain, stiffness and decreased range of motion of a joint. It occurs when the capsule, or the connective tissue surrounding your joint, becomes thick and stiff. Until recently, this condition had only been thought to occur in the shoulder.

The hip joint is a ball and socket joint in which the hip joint rotates the leg for movement. Arthritis, injury, wear and tear from sports or work or from unique anatomical shape can cause pain. Normally the joint is cushioned by synovial fluid, but with age, this can decrease.

A bigger butt is not about boosting your calorie intake and canceling your exercise routine, it's about building the glutes and hips for a rounder backside. Strength training that targets the muscles of your butt increases your butt size without adding undesirable sagging and dimpling.

When stair-stepper machines first burst onto the fitness scene, you could find banks of them in any gym. Each stepper was topped with a spandex-clad man or woman hustling to climb a never-ending flight of imaginary stairs.

The decision to wear a jock strap when you work out depends on your personal preferences, what you are doing, and what other clothing you're wearing at the time.

For some people, gaining weight in a specific part of the body -- such as the hips -- can be a challenge. Incorporating certain types of resistance-training exercises can be an effective way to increase muscle mass in your hips and can lead to the appearance of weight gain.

Jumping is a component of numerous athletic events. For decades, athletes have tried to improve their ability to jump higher. These efforts have involved wearing funny shoes, lifting weights and jumping rope.