The iconic, leather jacket oozes masculine style but an aged or stiff jacket is less than pleasurable to wear. A leather jacket should stretch until it fits well and complements your body, but it should not hang like a shapeless coat.

Doing splits with one leg in front of you and one leg behind you requires flexibility in two major muscle groups. For the front leg, the hamstrings on the back of the leg are stretched in the splits. For the back leg, the splits challenge the hip flexors on the front of the hip.

Tight hip rotators can place unnecessary stress on the joint between your pelvis and sacrum known as the sacroiliac joint. Over time, this stress can adversely affect your spine, causing back pain and spine problems. Keeping your hip rotators flexible supports your spine and helps prevent injuries.

Strengthening the sternoclavicular joint starts with range-of-motion stretches and your program should consist of shoulder stability exercises. Participating in a program to strengthen this joint may help you avoid injuries.

Lunges are effective strength-building exercises if performed properly, helping improve the musculature of the low back, hips, abdomen and legs. However, doing any kind of exercise can put you at risk of back pain or injury, especially if you're out of shape or not used to exercising.

Runners continually place strain on the joints and tissues of the lower body, and an intense or poorly designed training schedule, or improper running technique, might damage the tissues in your feet or legs.

Your knees are complex machines that contain many tendons, ligaments and cartilage. They work to connect the bones and muscles in your lower and upper legs. Your knees may get sore and sustain injuries if you use them a lot but don’t take steps to maintain them.

Whether you're experiencing tightness in the upper arm or just want some added flexibility in the area, biceps stretches may help.

One of the best ways to stretch the levator scapula neck muscles is so simple it's almost silly, but it feels so good that you'll find yourself using this stretch multiple times throughout the day. Stand or sit with your spine tall and tailbone gently tucked under.

The tilt of your pelvis can affect the health of your spine. An excessive anterior, or front, tilting pelvis pulls on lower back muscles, possibly leading to lower back pain and hamstring strain. Tight hamstring muscles can also cause postural misalignment, but in the opposite direction.

Through regular exercise, you can change the shape and composition of your body. You can get bigger or smaller all by manipulating different variables of a workout program. While stretching and its effect on performance is mixed, stretching alone will not make your legs thinner.

Stretching is an important part of the exercise regimen. It helps reduce the chance of injury and improves blood flow to the muscles. Stretching exercises performed at night can help relax your muscles and prepare your body for sleep. They can relieve tension that builds up in your muscles throughout the day.