First aid training covers a surprisingly broad set of skills, from performing CPR and controlling serious bleeding to recognizing the warning signs of a stroke or heart attack. Most courses run between four and eight hours and result in a certification valid for two years. Whether you’re taking a class for a job requirement or personal preparedness, here’s what you’ll actually learn.
CPR and Using an AED
CPR is the cornerstone of every first aid course. You’ll practice on mannequins until the technique feels automatic: push hard and fast on the center of the chest at a rate of 100 to 120 compressions per minute, pressing down at least 2 inches on an adult. The current standard is 30 compressions followed by 2 rescue breaths, repeated in cycles until emergency services arrive or the person starts breathing on their own. For infants and small children, the depth changes to about one-third the depth of the chest, and you use fewer fingers instead of full hands.
You’ll also learn how to use an automated external defibrillator, or AED. These devices are designed for untrained bystanders, so the machine literally talks you through each step, but practicing with one in class removes the hesitation you’d feel in a real emergency. You learn where to place the pads, when to stand clear, and how to resume compressions after a shock is delivered.
Clearing a Blocked Airway
Choking response is one of the most immediately practical skills in the course. The first step is often overlooked: ask the person if they can speak or cough forcefully. A strong cough can dislodge the object on its own, and jumping in with physical maneuvers too early can actually make things worse.
If the person can’t speak, breathe, or cough effectively, you’ll perform abdominal thrusts. Standing behind them, you place your fist just above the navel, grab it with your other hand, and push inward and upward in quick thrusts. You repeat until the object comes out or the person loses consciousness, at which point you transition to CPR. For infants under one year old, abdominal thrusts aren’t recommended. Instead, you alternate five back blows with five chest thrusts, a technique you’ll practice on an infant mannequin.
Controlling Bleeding
Severe bleeding can become life-threatening in minutes, so first aid courses spend real time on this. The primary technique is direct pressure: press a clean cloth firmly over the wound and hold it there. You’ll learn not to lift the cloth to check, since doing so disrupts clot formation.
Courses also cover tourniquet use for situations where direct pressure isn’t enough. A tourniquet is appropriate when bleeding from a limb is life-threatening and can’t be controlled by pressing on the wound directly, when a limb is partially or fully amputated with multiple bleeding points, or when the wound is trapped or inaccessible. Civilian first aid training increasingly includes tourniquets because the evidence shows that the risk of losing a limb from a properly applied tourniquet is far lower than the risk of bleeding to death without one. You’ll practice tightening the device above the wound and noting the time of application so paramedics know how long it’s been in place.
Recognizing Stroke and Heart Attack
First aid training teaches you to spot emergencies you can’t treat yourself but can dramatically improve by acting fast. For stroke, you’ll memorize the FAST acronym: Face drooping (ask the person to smile and check for asymmetry), Arm weakness (ask them to raise both arms and see if one drifts down), Speech difficulty (have them repeat a simple sentence and listen for slurring), and Time to call 911. Even if symptoms disappear on their own, emergency care is still critical because a temporary episode often precedes a full stroke.
Heart attack symptoms are less predictable than most people expect. Chest pain or pressure is the classic sign, but many people experience shortness of breath with no chest discomfort at all. Cold sweats, nausea, and lightheadedness are all warning signs. Women in particular are more likely to have these less obvious symptoms. Training helps you recognize the pattern so you don’t dismiss it as indigestion or anxiety.
Burns and When They’re Serious
You’ll learn to distinguish minor burns from those requiring emergency care. For a minor burn, the treatment is straightforward: hold it under cool (not cold) running water for about 10 minutes. No butter, no ice, no toothpaste. These home remedies can trap heat or damage tissue further.
A burn needs emergency care if it looks dry, leathery, or charred, with patches of white, brown, or black. Burns larger than about 3 inches across, or any burn covering the hands, feet, face, groin, or a major joint, also require immediate help. While waiting for paramedics, you loosely cover the area with clean gauze, elevate it above heart level if possible, and watch for signs of shock: cool and clammy skin, a weak pulse, and shallow breathing. Electrical burns, including lightning strikes, always need emergency evaluation regardless of how the skin looks, because the internal damage can be severe.
Sprains, Strains, and Fractures
The RICE method is the go-to framework for soft tissue injuries. Rest means keeping weight and stress off the injured area. Ice means applying a cold pack with a barrier between the ice and skin for 10 to 20 minutes at a time, every hour or two. Compression involves wrapping the area with an elastic bandage to control swelling. Elevation means raising the injured limb above heart level to slow blood flow to the area.
For suspected fractures, the key principle is immobilization: keep the injured limb still in the position you found it. You’ll practice improvising splints using rigid materials and padding, securing them above and below the suspected break. The goal isn’t to set the bone. It’s to prevent movement that could worsen the injury during transport.
Seizures and Shock
Seizure first aid is mostly about what not to do. Don’t hold the person down or try to restrain their movements, since this can injure both of you. Don’t put anything in their mouth, which is a persistent myth that leads to broken teeth and jaw injuries. Don’t attempt rescue breathing during the seizure itself, because breathing typically resumes on its own once it ends. Don’t offer food or water until the person is fully alert, as they could choke. What you should do: clear hard objects away, protect their head, time the seizure, and stay with them until they’re oriented.
Shock is covered as a condition that can accompany nearly any serious injury. When the body isn’t circulating enough blood, you’ll see cool and clammy skin, rapid shallow breathing, confusion, and a weak pulse. Training teaches you to lay the person flat, elevate their legs if no spinal injury is suspected, keep them warm with a blanket, and avoid giving them anything to eat or drink.
What’s in a First Aid Kit
Most courses walk you through the contents of a standard first aid kit so you can stock one at home or verify the one at your workplace. OSHA’s minimum requirements for a workplace kit give a good baseline: gauze pads in multiple sizes (4×4 and 8×10 inches), adhesive bandages, roller gauze at least 2 inches wide, two triangular bandages (useful as slings or tourniquets), wound cleaning towelettes, scissors, tweezers, adhesive tape, latex or nitrile gloves, elastic wraps, a splint, a resuscitation mask, and at least one blanket. Directions for requesting emergency assistance should be included as well. For a home kit, you’d add things like over-the-counter pain relievers and antihistamines.
Certification and What Comes Next
Standard first aid and CPR certification through the American Red Cross or American Heart Association is valid for two years. Courses combine classroom instruction or online modules with hands-on practice, and you need to pass a skills check and written test. Many employers in childcare, construction, fitness, education, and food service require current certification.
The skills fade faster than the certification does. Studies on CPR retention consistently show that performance drops within months without practice. Refreshing your skills annually, even informally, keeps the muscle memory intact for the moment it matters.