A good warm-up raises muscle temperature, improves joint mobility, and helps you rehearse movement patterns before loading them. It doesn't need to be long or complicated - but skipping it entirely usually means worse performance and higher risk of discomfort under load.
Why Warming Up Matters
Raises Muscle Temperature
Warmer muscles contract more forcefully and relax faster, improving elasticity and readiness for work.
Primes the Nervous System
Dynamic movements help wake up motor units, improving coordination and force production.
Improves Range of Motion
Dynamic mobility work can meaningfully improve ROM before training without the power-output concerns of long static holds.
Prepares Connective Tissue
Joints and tendons respond to gradual loading. Warm-up gives them time to prepare before heavier work.
Phase 1: General Warm-Up (5 Minutes)
Goal: Increase heart rate, raise core and muscle temperature, and get blood flowing to working muscles.
Best General Warm-Up Options
Choose ONE and perform for 5 minutes at moderate intensity:
- Assault Bike / Rowing Machine: Full-body engagement, low impact (best option)
- Light Jogging / Fast Walking: Simple, accessible, good for lower body days
- Jump Rope: High coordination demand, wakes up nervous system
- Elliptical / Bike: Low impact, good for those with joint issues
- Bodyweight Circuit: Jumping jacks, high knees, butt kicks (30 sec each x 3 rounds)
Intensity Check
You should break a light sweat and elevate heart rate to roughly 50–60% of max. Not exhausting - just enough to feel warm and ready.
Phase 2: Mobility + Activation (5–7 Minutes)
Goal: Open up key joints, activate underactive muscles, and prepare movement patterns for loaded training.
Upper Body Mobility (Choose 3–4 exercises, 8–10 reps each)
- Arm Circles: Increases shoulder ROM and warms rotator cuff
- Band Pull-Aparts: Activates rear delts and mid-back (useful for shoulder positioning)
- Cat-Cow Stretch: Mobilizes thoracic spine and core
- Scapular Wall Slides: Activates serratus anterior, improves overhead position
- Thread the Needle: Opens thoracic rotation (useful for pressing and pulling)
Lower Body Mobility (Choose 3–4 exercises, 8–10 reps each side)
- 90/90 Hip Stretch: Opens hip capsule, essential for squat depth
- World's Greatest Stretch: Hits hips, hamstrings, thoracic spine in one move
- Cossack Squats: Opens hip adductors and improves lateral movement
- Leg Swings (Front-to-Back & Side-to-Side): Increases hip flexor/hamstring ROM
- Deep Bodyweight Squats (Pause at Bottom): Tests squat pattern before loading
Glute Activation (Useful on Lower-Body Days)
Perform 2–3 exercises, 12–15 reps each:
- Glute Bridges: Drive through heels, squeeze glutes at top
- Banded Clamshells: Targets glute medius (prevents knee valgus)
- Fire Hydrants: Wakes up hip abductors and external rotators
- Banded Lateral Walks: Targets glute medius and helps improve hip stability
Dynamic vs Static Stretching
The type of stretching you use before training matters. Dynamic movement is generally more useful pre-workout, while longer static holds are usually better saved for after.
Dynamic Stretching (Before)
- Active, movement-based
- Raises body temperature
- Improves performance
- Activates nervous system
- Prepares joints for movement
Static Stretching (After)
- Holding positions 20–30 sec
- Can reduce power output
- May impair performance
- Best for cool-down
- Improves flexibility over time
Phase 3: Specific Warm-Up (3–5 Minutes)
Goal: Rehearse the exact movement patterns you'll perform with progressively heavier loads.
For Barbell Lifts (Squat, Bench, Deadlift)
- Set 1: Empty bar × 10–12 reps (focus on tempo and form)
- Set 2: ~30–40% working weight × 8 reps
- Set 3: ~50–60% working weight × 5 reps
- Set 4: ~70–80% working weight × 3 reps
- Set 5 (optional): ~85–90% working weight × 1–2 reps
Warm-Up Sets by Working Weight
| Working Weight | Min Warm-Up Sets | Example Progression |
|---|---|---|
| Light (60–80 kg) | 2–3 sets | Bar, 50%, 80% |
| Moderate (80–120 kg) | 3–4 sets | Bar, 40%, 60%, 80% |
| Heavy (120–180 kg) | 4–5 sets | Bar, 40%, 55%, 70%, 85% |
| Very Heavy (180 kg+) | 5–6 sets | Bar, 35%, 50%, 65%, 75%, 88% |
Use these as examples, not fixed rules - heavier lifters and more technical lifts usually need more ramp-up sets, while lighter or simpler exercises need fewer.
Example for 315 lb (143 kg) Squat
- 45 lb (20 kg) × 12 reps
- 135 lb (61 kg) × 8 reps
- 185 lb (84 kg) × 5 reps
- 225 lb (102 kg) × 3 reps
- 275 lb (125 kg) × 1–2 reps
- Working sets at 315 lb (143 kg)
Rest Between Warm-Up Sets
Keep rest short (30–90 seconds) for light sets, increase to 1–2 minutes as weights get heavier. You want to stay warm but not fatigued. These are rehearsals, not work sets.
Complete Warm-Up Protocols by Workout Type
Lower Body Day
12–15 minutes total:
- 5 min bike or row
- 90/90 hip stretch, world's greatest stretch, leg swings (2 min)
- Glute bridges, banded clamshells, lateral walks (3 min)
- Squat/deadlift ramp-up sets (5–7 min)
Upper Body Day
10–12 minutes total:
- 5 min rowing machine
- Arm circles, band pull-aparts, wall slides (3 min)
- Face pulls, external rotations (2 min)
- Bench/press ramp-up sets (5 min)
Full Body / HIIT
8–10 minutes total:
- 3 min jump rope or bike
- Inchworms, high knees, mountain climbers (3 min)
- Air squats, push-ups, lunges at 60% effort (2–3 min)
Cardio / Running Day
5–8 minutes total:
- 5 min easy jog or brisk walk
- Leg swings, walking lunges, high knees, butt kicks (3 min)
- A-skips, B-skips, or short sprints at 70% effort (optional)
Signs You're Not Warming Up Enough
Warning Signs
- Feeling stiff during early sets
- Poor coordination on first exercises
- Joint discomfort when starting
- Taking 3–4 sets to "get going"
- Frequent minor muscle strains
Properly Warmed Up
- Light sweat on the skin
- Slightly elevated breathing
- Muscles feel warm and pliable
- Joints move smoothly
- Mentally focused and ready
Special Considerations
Morning Training
Your body is stiffer and core temperature is lower. Extend general warm-up by 3–5 minutes and add extra mobility work.
Cold Environments
Cold muscles take longer to warm up. Add 5+ minutes to general warm-up, keep moving between sets, wear layers.
Age 40+
Older athletes often need more warm-up time. Add 5–10 minutes overall and pay extra attention to mobility work.
Previous Injuries
Add targeted mobility and activation for injured areas. Warm-up is your chance to assess how things feel before loading.
How Long Should You Warm Up?
| Duration | Situation | What to Include |
|---|---|---|
| 5 Minutes | Minimum / short on time | Light cardio + movement-specific sets |
| 10–15 Minutes | Optimal for most people | All three phases complete |
| 15–20 Minutes | Older adults, heavy lifting, cold weather | Extended mobility + more warm-up sets |
7 Common Warm-Up Mistakes
Long Static Stretching Before Lifting
Extended static holds can temporarily reduce power output. Dynamic movement is usually a better pre-workout choice.
Skipping Movement Prep
Going straight to heavy working sets without mobility or activation work means your first sets often feel stiff and uncoordinated.
Rushing Warm-Up Sets
Use 3–5 progressive warm-up sets to rehearse the movement pattern before working weight.
Warming Up Too Hard
Don't pre-fatigue yourself. You should feel READY, not tired.
More Common Errors
- Ignoring mobility restrictions: If a movement hurts in warm-ups, address it before loading
- Skipping entirely: Even 5 minutes is better than nothing
- Not adapting to age: Older lifters often need 3–5 extra minutes for joint prep
The Bottom Line
A good warm-up should make you feel looser, warmer, and more prepared - not tired. For most lifters, that means a few minutes of general movement, some dynamic mobility or activation work where needed, and a handful of ramp-up sets for the first main exercise. The best warm-up is not the longest one, but the one that prepares the session without stealing energy from it.