Similar to sprains, it can vary in severity, from a stretching of the muscle or tendon to a complete tear of the tendon from the muscle. Some of the most common places that strains occur are in the foot, back of the leg (hamstring), or back. Bruising (contusion)
A contusion is the discoloration of the skin, which results from underlying muscle fibers and connective tissue being crushed. This can happen in a variety of ways such as a direct blow to the skin, or a fall taken against a hard surface. The discoloration in the skin is present when blood begins to pool around the injury. Tendinitis
Tendinitis is a type of overuse injury to the tendons, which demonstrates signs of inflammation of tendons around a joint. Tendinitis is the most common cause of shoulder pain and also leg pain . Tendinitis occurs when there is repetitive stress on the subacromial bursa, which causes the bones to make contact with the tendons and irritate them. Diagnosis
Classifications
Acute injuries
Any type of injury that occurs to the body through sudden trauma, such as a fall, twist or blow to the body. A few examples of this type of injury would be sprains, strains and contusions. Overuse injuries
An overuse injury occurs when a certain activity is repeated frequently and the body does not have enough time to recover between occurrences. Examples include bursitis and tendinitis. Commonly injured tissues
With examples of each.
Parentheses indicate location in body

LigamentsAnterior cruciate ligament (knee), medial collateral ligament (knee), ulnar collateral ligaments (wrist/hand), interspinous ligaments (vertebrae)MusclesBiceps brachii (upper arm), rectus femoris (thigh), transverse abdominis (abdominals)TendonsPatellar tendon (knee), calcaneal/Achilles tendon (foot/lower leg), biceps tendon (shoulder/elbow)NervesBrachial plexus (shoulder), ulnar nerve (elbow/hand), peroneal nerve (ankle/foot), cranial nerves I-XII(head)BonesFemur (leg), humerus (arm), ribs (torso), metatarsals I-VI (foot), metacarpals I-VI (hand)CartilageMenisci (knee), intervertebral discs (spine), acetabulum (hip)

Management
RICE method
The RICE method is an effective procedure used in the initial treatment of a soft tissue injury. Rest
It is suggested that the patient take a break from the activity that caused the injury in order to give the injury time to heal. Ice
The injury should be iced on and off in 20 minute intervals, avoiding direct contact of the ice with the skin. Compression
Bandaging the injury will compress it, and prevent any further bleeding or swelling from occurring. Elevation
Elevating the injury above the heart while resting will aid in the reduction of swelling. No HARM protocol
This mnemonic indicates what  not  to do within the first 48–72 hours after the injury in order to speed up the recovery process. Heat
Applying heat to the injured area can cause blood flow and swelling to increase. Alcohol
Alcohol can inhibit the ability to feel if the injury is becoming more aggravated, as well as increasing blood flow and swelling. Re-injury
Avoid any activities that could aggravate the injury and cause further damage. Massage
Massaging an injured area can promote blood flow and swelling, and potentially cause more damage if done too early.