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How to Warm Up Before a Workout: The Right Way

A science-backed warm-up routine that prepares your body for training, reduces injury risk, and improves performance — covering general warm-up and specific activation.

By MyWorkoutCalendar Editorial Team
7 min readPublished 2026-04-22
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A proper warm-up is one of the most skipped parts of training and one of the most valuable. A well-executed warm-up increases core temperature, increases muscle tissue elasticity, activates the nervous system, and mentally prepares you for the training ahead. The difference between a cold start and a proper warm-up is noticeable in your first working set.

Why Warming Up Matters

**Injury prevention:** Cold muscles and connective tissue are more prone to strains and tears. Increased tissue temperature reduces stiffness and improves the muscle's ability to absorb force.

**Performance:** Studies show that warmed-up athletes produce significantly more force and power output than those who begin cold. Warm-up is not optional for peak performance.

**Neural activation:** The nervous system needs to be "switched on" before you attempt maximum effort. Warm-up sets on compound lifts wake up the motor units required for heavy lifting.

The Two Phases of a Good Warm-Up

Phase 1: General Warm-Up (5–10 minutes)

Raise core temperature and heart rate. Options: - Light rowing (5 minutes at moderate pace) - Jump rope (2–3 minutes) - Brisk walking or light jog - Cycling (stationary bike, easy resistance)

Avoid static stretching here — research shows it temporarily reduces force production when done before heavy lifting.

Phase 2: Dynamic Mobility + Specific Activation (5–10 minutes)

**Dynamic mobility (joints and movement patterns):** - Leg swings (front/back, lateral) — 10 each direction - Hip circles — 10 each direction - Arm circles (forward and backward) — 10 each - Thoracic rotations — 10 each side - Bodyweight squat (slow, controlled) — 10 reps - Hip hinge (hands down legs, feel hamstring stretch) — 10 reps - Inchworm push-up — 5 reps

**Muscle activation (before lower body days):** - Glute bridge — 2×15 (activates glutes before squats and deadlifts) - Clamshell — 2×15 each side (activates hip abductors) - Band walk (if band available) — 2×15 steps each direction

**Muscle activation (before upper body days):** - Band pull-apart — 2×15 (activates rear delts and external rotators) - Face pull with light band or cable — 2×15 - Shoulder rotation drill — 10 reps

Warm-Up Sets Before Heavy Compound Lifts

Before your first working set on a compound lift, work up through progressively heavier sets. Do NOT warm up with one light set and immediately jump to your working weight.

**Example: Working up to 100 kg Bench Press** 1. Empty bar × 10 (20 kg) 2. 40 kg × 8 3. 60 kg × 5 4. 75 kg × 3 5. 90 kg × 1 6. 100 kg × working sets

These warm-up sets should feel increasingly challenging but never exhausting. You're preparing the nervous system and reinforcing technique, not fatiguing yourself.

How Long Should a Warm-Up Take?

- Beginners: 5–10 minutes total (shorter because lighter loads require less preparation) - Intermediate: 10–15 minutes - Advanced: 15–20 minutes (heavier loads, more complex joint preparation needed)

What NOT to Do Before Training

**Static stretching pre-training:** Research consistently shows that holding static stretches for 30+ seconds before heavy lifting reduces maximal force production by up to 8%. Save static stretching for post-workout.

**Cardio that fatigues you:** A 10-minute light row is a warm-up. A 30-minute hard run before lifting is a session in itself — you'll be too fatigued to train effectively.

**Skipping the warm-up:** Even 5 minutes of dynamic movement is significantly better than starting cold. On days you're short on time, shorten the workout, not the warm-up.

After your session, [track it in your workout log](/dashboard) to maintain the progressive overload record that drives long-term progress.

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