Most people treat the warmup as the part before the workout. Something to get through so you can start the real thing. Five minutes on a treadmill, maybe some arm circles, then into the first set.
This approach works until it doesn’t. The injury risk from cold tissue under load is real, and so is the performance drop: research consistently shows that a properly warmed-up muscle generates more force, moves through a wider range, and recovers faster than one that goes from the desk chair directly into a loaded squat.
The other side of this is also true: a warmup doesn’t need to be long, complicated, or expensive. Five minutes of the right movements changes your body’s readiness for the session. Five minutes of the wrong ones doesn’t.
What a Warmup Actually Does#
Three things happen during an effective warmup, and understanding them helps you design one that actually works.
Core temperature rises#
Muscle tissue is more pliable, more efficient, and less prone to strain when it’s warm. A 1 to 2 degree Celsius increase in core temperature is enough to measurably improve muscle function. This is why light movement, not static holding, is the foundation of any warmup.
Prime movers get activated#
Your nervous system activates muscles in patterns it recognizes. If you sit for eight hours and then ask your glutes to fire explosively, the neural connection is sluggish. A warmup that includes the movement patterns of your upcoming session tells your nervous system what’s about to happen and sharpens the motor patterns involved.
Synovial fluid distributes through joints#
Joint fluid thickens at rest and becomes more viscous. Movement distributes it across the joint surface, reducing friction and improving range of motion. This is why your joints feel stiff when you first get up and looser after 10 minutes of movement.
A 2010 meta-analysis in the Journal of Strength and Conditioning Research found that dynamic warmups improved subsequent performance in strength, power, and agility tasks compared to either no warmup or static stretching warmups. The mechanism is the three factors above.
What to Skip#
Static stretching before training. Holding a stretch for 30 seconds or more before a session temporarily reduces the force-producing capacity of the stretched muscle. This is well-documented and counterintuitive: stretching cold before you train makes the muscle less able to do what you’re about to ask it to do. Save static stretching for after the session or as a separate practice.
Too much cardio. Five minutes on a treadmill raises your core temperature, which is useful. Twenty minutes of moderate cardio before a strength session creates fatigue that compromises the session you’re warming up for. A warmup should prepare, not deplete.
Nothing. The most common mistake. Particularly risky for lower body training, where cold hip flexors, glutes, and hamstrings under load are a genuine injury setup.
The Five-Minute Template#
This warmup works before any session type: strength training, HIIT, cardio, or mobility work. No equipment needed. Each movement runs for about 45 to 60 seconds.
Movement 1: Jumping Jacks or Marching in Place (60 sec)#
Start with something that raises your heart rate and begins the temperature increase. Jumping jacks are efficient and require nothing. If you’re training in a space where jumping isn’t practical, march in place with exaggerated arm swing.
This isn’t about cardio. It’s about getting blood moving and signaling to your nervous system that work is starting.
Movement 2: Leg Swings (30 sec each leg)#
Stand on one foot, hold a wall for balance if needed, and swing the other leg forward and back in a controlled arc. Gradually increase the range over the 30 seconds. Then swing the same leg side to side.
This activates the hip flexors, hamstrings, and hip abductors dynamically while improving hip range of motion through movement rather than static holding. These are the muscles most likely to be stiff from sitting and most involved in lower body training.
Movement 3: Arm Circles and Chest Openers (30 sec)#
Forward arm circles, then backward arm circles, progressively widening the range. Follow with a chest opener: interlace your hands behind your back, squeeze your shoulder blades together, and lift your arms slightly while opening your chest. Hold for two breaths and repeat.
This warms the shoulder joint, activates the upper back, and counteracts the forward-shoulder posture that builds up during desk work.
Movement 4: Bodyweight Squat with Pause (45 sec)#
Slow squat down, pause for one full second at the bottom, stand back up. Focus on keeping your heels on the floor and your chest upright. Do 8 to 10 reps over the 45 seconds.
This activates the glutes, quads, and hip flexors simultaneously while loading the ankle dorsiflexion range. If you’re doing any lower body work in the session, this is the most important warmup movement.
Movement 5: Inchworm (45 sec)#
Stand with feet hip-width apart. Hinge at the hips and walk your hands out to a plank position. Hold for one breath. Walk your hands back and stand up. Repeat.
The inchworm warms the entire posterior chain, activates the core, and dynamically stretches the hamstrings through movement rather than a static hold. It also integrates the hip hinge pattern that shows up in deadlifts, rows, and hinges.
Adjusting for Your Session#
The five-minute template above works for most training sessions. If your session has a specific focus, add one movement that mimics it.
Before heavy lower body work: Add 10 slow glute bridges after the squat. Lie on your back, feet flat on the floor, and drive your hips up one vertebra at a time. Squeeze at the top for two seconds. Glute bridges specifically address the glute inhibition that builds up from sitting.
Before upper body pressing: Add 10 band pull-aparts or prone Y raises (lie face-down, lift arms into a Y shape, squeeze the upper back). This pre-activates the rear deltoids and upper back before your pressing muscles take over.
Before running or rucking: Replace the squat with high knees and add lateral shuffles for 30 seconds. Running is a forward-motion activity, but the lateral shuffle warms the hip abductors that stabilize each single-leg ground contact.
On Soreness#
Delayed onset muscle soreness (DOMS) peaks 24 to 72 hours after a session, particularly after eccentric-heavy work. A proper warmup doesn’t eliminate DOMS, but it does reduce it.
The mechanism is partly mechanical (warmed tissue sustains less microtrauma under equivalent load) and partly circulatory (better blood flow during the session improves metabolite clearance afterward). A 2012 study in the Journal of Human Kinetics found that a dynamic warmup before eccentric exercise significantly reduced DOMS scores in the following 48 hours compared to a control group.
Five minutes before the session is one of the cheapest recovery interventions available.
The Consistency Angle#
A warmup that you’ll actually do is more valuable than a theoretically optimal one you skip when you’re in a hurry. The five-minute template above is designed to take less time than most people spend scrolling before a session. It requires no equipment, no space beyond what you’re already training in, and no special knowledge beyond this article.
If five minutes still feels like too much on a rushed day, do movements two through four. Three minutes of leg swings, a squat, and an inchworm is still meaningfully better than nothing.
Do this today: Before your next session, set a five-minute timer and run through the template above. Notice whether the first working set feels different from how it usually does. Most people find it does.
