Heat cramps are painful, involuntary muscle spasms that occur during or after intense exercise in hot environments. They are primarily caused by the loss of fluids and electrolytes through sweat. These cramps can affect any major muscle group used during exercise, including the hamstrings, abdominal muscles, and the calf muscles, depending on the specific activity performed.

In the summer, athletes are prone to various heat-related illnesses. 'Heat exhaustion' is a common condition occurring when the body is unable to regulate its temperature adequately, leading to fatigue, dizziness, and fainting. While heat stroke is more severe, heat exhaustion is a frequent precursor that requires immediate intervention to prevent progression to more dangerous states.

Tennis elbow, or lateral epicondylitis, is an overuse injury caused by repetitive wrist extension and forearm rotation. It is prevalent in racket sports like tennis and badminton due to the repetitive stress placed on the forearm tendons. The option 'Both A&B' correctly identifies that athletes in both sports are susceptible to this condition.

Lateral epicondylitis, commonly known as tennis elbow, occurs when the tendons in the elbow are overloaded, usually by repetitive motions of the wrist and arm. While golfer's elbow (medial epicondylitis) also involves tendon inflammation, it affects the inner side of the elbow. The term 'tennis elbow' is specifically associated with the lateral side, making option A the most accurate description of the condition described.

Chilblains and frostbite are conditions that occur when the skin and underlying tissues are exposed to extreme cold. These are caused by physical agents, such as low ambient temperatures, wind chill, or contact with freezing surfaces, which reduce blood flow and cause ice crystals to form in the tissues, leading to localized damage.

Sports surgery is a specialized branch of sports medicine focused on the surgical repair and treatment of musculoskeletal injuries sustained during athletic activities. It works in conjunction with rehabilitation to restore function.

A stress fracture is a common overuse injury that occurs when muscles become fatigued and are unable to absorb added shock. Eventually, the fatigued muscle transfers the overload of stress to the bone, causing a tiny crack. This is frequently seen in athletes who engage in high-impact activities like running and jumping, especially on hard or unforgiving surfaces that increase the ground reaction force.

A dislocation occurs when the articulating surfaces of a joint are completely forced out of their normal position. This displacement cannot happen without significant damage to the surrounding stabilizing structures, specifically the joint capsule and the ligaments that hold the bones together. Therefore, a tear in these soft tissues is a clinical requirement for a true dislocation to take place.

Scapular dyskinesis refers to the abnormal positioning or motion of the scapula. When the long thoracic nerve is compromised, the serratus anterior muscle becomes weak or paralyzed. This prevents the scapula from being held firmly against the thoracic wall, resulting in the characteristic 'winged' appearance during movement.

Heat exhaustion occurs when the body overheats, often due to prolonged exposure to high temperatures combined with inadequate fluid intake. Dehydration reduces the body's ability to regulate temperature through sweating, leading to symptoms like dizziness, nausea, and weakness. Maintaining proper hydration is critical for preventing heat-related illnesses during physical exertion.