why should we stretch often

For years, people assumed stretching was something only athletes needed to do before exercising or competing. But the reality is that doing simple stretches just two or three times a week can dramatically help anyone increase flexibility, improve balance, and relieve the pain caused by muscle and joint stiffness. Stretching is a simple and safe way to help prevent life-changing falls that can threaten your independence.
Your range of motion how far you can move a joint in various directions is determined by many things, starting with the inner workings of the joint and the structures surrounding it. Stretching exercises can help extend this range of motion. To understand how, it helps to be familiar with these structures and how they can help or hinder a joint's flexibility

• Joints are the junctions that link bones together. The architecture of each joint — that is, whether its structure is a hinge, pivot, or ball-in-socket — determines how the bones can move.
• Muscles surround joints and provide the energy used to move them. The amount of tension in the muscles surrounding a joint is a key factor in how big of a range of motion that joint can achieve. Muscle tension can be affected both by passive factors, such as tissue scarring or your habitual posture, and by active factors, such as involuntary muscle spasms or purposeful muscle contractions.
• Tendons are flexible cords of strong tissue that connect muscles to bones and make movement possible. When a joint move, energy from the muscles is transferred into the tendons, which tug on the bones.
• Ligaments are tough, fibrous bands of tissue that bind bone to bone, or bone to cartilage, at a joint. An example is the anterior cruciate ligament (ACL), one of five ligaments that together control the movements of the knee. Among other things, the ACL keeps the knee joint from rotating too far.

Benefits of stretching
Studies about the benefits of stretching have had mixed results. Some show that stretching helps. Other studies show that stretching before or after exercise has little to no benefit.
Some research shows that stretching doesn't reduce muscle soreness after exercise, and other studies show that static stretching performed immediately before a sprint event may slightly worsen performance.
Stretching can help improve flexibility, and, consequently, range of motion about your joints. Better flexibility may:

• Improve your performance in physical activities
• Decrease your risk of injuries
• Help your joints move through their full range of motion
• Enable your muscles to work most effectively

Stretching also increases blood flow to the muscle. You may learn to enjoy the ritual of stretching before or after hitting the trail, ballet floor or soccer field.
Stretching essentials
Before you plunge into stretching, make sure you do it safely and effectively. While you can stretch anytime, anywhere, be sure to use proper technique. Stretching incorrectly can actually do more harm than good.
Use these tips to keep stretching safe:

• Don't consider stretching a warmup. You may hurt yourself if you stretch cold muscles. Before stretching, warm up with light walking, jogging or biking at low intensity for five to 10 minutes. Even better, stretch after your workout when your muscles are warm.

Consider skipping stretching before an intense activity, such as sprinting or track and field activities. Some research suggests that pre-event stretching may actually decrease performance. Research has also shown that stretching immediately before an event weakens hamstring strength.
Instead of static stretching, try performing a "dynamic warmup." A dynamic warm-up involves performing movements similar to those in your sport or physical activity at a low level, then gradually increasing the speed and intensity as you warm up.

• Strive for symmetry. Everyone's genetics for flexibility are a bit different. Rather than striving for the flexibility of a dancer or gymnast, focus on having equal flexibility side to side (especially if you have a history of a previous injury). Flexibility that is not equal on both sides may be a risk factor for injury.
• Focus on major muscle groups. Concentrate your stretches on major muscle groups such as your calves, thighs, hips, lower back, neck and shoulders. Make sure that you stretch both sides.

Also stretch muscles and joints that you routinely use.

• Don't bounce. Stretch in a smooth movement, without bouncing. Bouncing as you stretch can injure your muscle and actually contribute to muscle tightness.
• Hold your stretch. Breathe normally and hold each stretch for about 30 seconds; in problem areas, you may need to hold for around 60 seconds.
• Don't aim for pain. Expect to feel tension while you're stretching, not pain. If it hurts, you've pushed too far. Back off to the point where you don't feel any pain, then hold the stretch.
• Make stretches sport specific. Some evidence suggests that it's helpful to do stretches involving the muscles used most in your sport or activity. If you play soccer, for instance, stretch your hamstrings as you're more vulnerable to hamstring strains. So opt for stretches that help your hamstrings.
• Keep up with your stretching. Stretching can be time-consuming. But you can achieve the most benefits by stretching regularly, at least two to three times a week.

Skipping regular stretching means you risk losing the potential benefits. For instance, if stretching helped you increase your range of motion, your range of motion may decrease again if you stop stretching.

• Bring movement into your stretching. Gentle movements, such as those in tai chi or yoga, can help you be more flexible in specific movements. These types of exercises can also help reduce falls in seniors.

Remember the "dynamic warmup:" If you're going to perform a specific activity, such as a kick in martial arts or kicking a soccer ball, start out slowly and at low intensity to get your muscles used to it. Then speed up gradually

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