Warming up before you lift a weight or start a cardio session is not an optional extra. It is the bridge between sitting still and moving with purpose. A well‑chosen warm‑up raises your heart rate gradually, sends blood to the muscles you are about to use, and helps your joints move through a fuller range. Whether you train at home with bodyweight or in a gym with barbells, the same principle applies: spend a few minutes preparing your body, and your workout will feel smoother and safer.
Why a Warm‑Up Matters
When you start moving, your cardiorespiratory and neuromuscular systems wake up. According to the American Council on Exercise, a gradual warm‑up leads to efficient calorie burning by increasing your core body temperature, produces faster and more forceful muscle contractions, and raises your metabolic rate so oxygen reaches working muscles more quickly. It also helps prevent injuries by improving muscle elasticity, gives you better muscle control by speeding up neural pathways, and improves joint range of motion. On top of the physical changes, a warm‑up psychologically prepares you for higher intensities by increasing your arousal and focus.
The same source explains that a warm‑up should consist of two phases: first, progressive aerobic activity that uses the muscles you will rely on during your workout, and second, flexibility exercises that stretch those same muscles. For example, if you plan to run, warm up with a slow jog; if you will cycle, begin in lower gears. The aerobic phase should produce a small amount of perspiration without leaving you fatigued.
NHS Warm‑Up Routine: Step by Step
The United Kingdom’s National Health Service offers a straightforward warm‑up that takes at least 6 minutes and can be done in a small space. NHS guidance says to spend longer if you feel you need it. The routine moves through five exercises that gently raise your heart rate and mobilise your joints.
Start with marching on the spot for 3 minutes. Pump your arms up and down in rhythm with your steps, keeping your elbows bent and your fists soft. After a minute or so, march forwards and backwards. Next, move into heel digs: aim for 60 heel digs in 60 seconds. Place alternate heels to the front, keeping the front foot pointing up, and punch out with each heel dig. Keep a slight bend in the supporting leg.
Then perform knee lifts, aiming for 30 knee lifts in 30 seconds. Stand tall and bring up alternate knees to touch the opposite hand. Keep your abdominal muscles tight and your back straight, with a slight bend in the supporting leg. While you continue marching on the spot, do shoulder rolls: two sets of 10 repetitions. Roll your shoulders forwards five times and backwards five times, letting your arms hang loose by your sides. Finally, do 10 knee bends. Stand with your feet shoulder‑width apart and your hands stretched out. Lower yourself no more than 10 cm by bending your knees, then come up and repeat.
This sequence is suitable for most people in good health with a reasonable level of fitness. NHS advice states that anyone who is unsure about their fitness level, has a health problem or injury, is pregnant, or has recently given birth should get advice from a healthcare professional before trying the exercises. Stop immediately if you feel any pain or become unwell.
ACE Total‑Body Warm‑Up Circuit
The American Council on Exercise describes a total‑body warm‑up circuit that can be used before resistance training or any favourite physical activity. The circuit starts with two to four core exercises and then progresses to two to four bodyweight movements that integrate the hips and shoulders. Doing two sets of two core and two bodyweight exercises can be enough when time is short, but adding a couple more sets helps ensure the body is completely warmed up.
Begin with the hip bridge. This exercise increases activity in the glutes while stretching the hips and low back. Perform two sets of 10–12 repetitions with 30 seconds of rest between sets. Next, do the bird‑dog, which requires spine stabilisation while the arms and legs move. Again, perform two sets of 10–12 reps with 30 seconds of rest. Move to the plank, holding it for 20–45 seconds, then rest for 30 seconds and repeat. Follow with the side plank, holding for 20–45 seconds on each side with 30 seconds of rest in between.
After the core work, shift to movement‑based exercises. The side lunge develops muscles in the hips and outer thighs. Perform 12–15 repetitions on each side, rest for 45 seconds, and repeat for a second set. Push‑ups are an essential warm‑up for upper‑body strength days: do two sets of 6–10 reps with 45 seconds of rest, modifying as needed. Finish with bodyweight squats. Keep your chest high, sink back into the hips, and press your feet into the ground to return to standing. Do two sets of 12–15 reps with 45 seconds of rest between sets.
ACE notes that these exercises gradually increase in intensity and progress from stabilisation to movement. Once you learn the routine, it can serve as an effective warm‑up for resistance training or, by adding more reps and sets, become a total‑body workout when you are travelling without equipment.
How to Gauge Your Warm‑Up Intensity
The U.S. Department of Health and Human Services physical activity guidelines use a simple talk test to help people judge effort. A person doing moderate‑intensity aerobic activity can talk but not sing. During a warm‑up, you should be working at a level that feels light to moderate, well below the point where you cannot speak. The HHS guidelines also emphasise that physical activity should be increased gradually over time. Starting with short bouts of activity and slowly building duration and intensity is a safe way to let your body adapt, and that same gradual approach applies to the warm‑up itself.
Cool‑Down Stretches After Your Workout
Cooling down is just as important as warming up. The CDC’s Growing Stronger program, developed with Tufts University, recommends stretching after each strength‑training workout to improve flexibility, avoid injuries, and help the body relax. Each stretch should be held for a slow count of 20 to 30 seconds while breathing throughout.
The chest and arms stretch targets the front of the shoulders and chest. Stand with your feet shoulder‑width apart, extend both arms behind your back, and clasp your hands together. Retract your shoulders if possible, keep your back straight, and look ahead. For the hamstring and calf stretch, stand facing a sturdy chair, bend forward at the hips with legs straight but not locked, and rest your hands on the chair seat. Feel the stretch in the back of your upper and lower leg.
The quadriceps stretch relaxes the front of the thigh. Stand next to a counter or sturdy chair for balance, bend one leg back, and grab your foot or ankle. Keep your standing knee straight but not locked, and stand up straight without leaning forward. The neck, upper back, and shoulders stretch is done by clasping your hands in front, rotating your palms to face the ground, raising your arms to about chest height, and pressing your palms away from your body. You should feel the stretch along your neck, upper back, and shoulders.
Growing Stronger notes that these stretches can also be used any time you feel tense or need to relax. They benefit both body and mind.
Putting It All Together
You do not need to do every exercise from every source. Pick one warm‑up approach that fits your workout and your available time. If you are about to lift weights, the ACE circuit with core activation and bodyweight moves prepares your muscles and joints well. If you are heading out for a run or a brisk walk, the NHS marching routine is a quick, equipment‑free way to get your blood moving. After your session, spend a few minutes on the static stretches from Growing Stronger to bring your heart rate down and maintain flexibility.
Always listen to your body. A warm‑up should leave you feeling ready, not tired. If you have a chronic condition, are pregnant, or have been inactive for a while, speak with a healthcare provider before starting a new routine. Stop and seek help if you experience chest pain, dizziness, or severe shortness of breath during any part of your workout.
For more guidance on building a complete training habit, explore the warm‑ups subcategory, the broader Training Fundamentals section, and the Training Fundamentals pillar article. You can also find detailed advice on strength training and cardio and conditioning to match your warm‑up to the workout ahead.
Frequently asked questions
How long should a warm‑up last?
NHS guidance states that a warm‑up should take at least 6 minutes, and you can extend it if you feel the need. The American Council on Exercise suggests adding an extra five to ten minutes to each workout for the warm‑up phase. The exact duration depends on the intensity of your planned workout and your own fitness level.
Can I use the same warm‑up for strength and cardio sessions?
Yes, but you may want to tailor the movements. The ACE warm‑up circuit works well before resistance training because it activates the core and mimics bodyweight patterns. The NHS routine is a good general warm‑up for cardio activities like walking or running. Both follow the same principle of gradually raising your heart rate and mobilising the muscles you will use.
Do I really need to cool down with stretches?
The CDC’s Growing Stronger program recommends stretching after each strength‑training workout to improve flexibility, avoid injuries, and help the body relax. Holding each stretch for 20 to 30 seconds gives muscles time to lengthen while your breathing returns to normal.
Ready to build a full warm‑up habit? Visit the warm‑ups category page for more routines and tips.
