01Skipping the warm-up entirely

"No time" — the most common sentence before an injury. Cold muscles are less elastic, joints less lubricated, and your nervous system isn't awake yet. Research links training without a warm-up to a clear rise in muscle and tendon injuries, especially in compound lifts like squats and deadlifts.

Fix: just 5–8 minutes raising your body temperature and heart rate gradually — a small investment that saves weeks off.

02Static stretching on cold muscles

Holding a 30-second stretch before training is a habit from school PE. On cold muscles, long static stretches temporarily reduce force output — you enter your session weaker, not readier.

Fix: go dynamic — movements that mimic your workout through a growing range: leg swings, walking lunges, torso rotations. Save static stretching for after.

03A general warm-up… for a specific workout

Five minutes on the treadmill is a fine start — but it doesn't prepare your shoulder for pressing or your hips for a deep squat. Every session needs a specific warm-up for the joints and muscles working today.

• Chest day? Shoulder rotations + band pull-aparts + light presses.
• Leg day? Bodyweight squats + hip openers + ankle work.

04Jumping straight to your working weight

Even after a great warm-up, loading your working weight immediately shocks joints and the nervous system. Ramp-up sets groove the movement pattern and give you an early warning: feel something off at 50% and your body is telling you before you're under a heavy bar.

Fix: at least two ascending sets before your first working set (for a 100 kg goal: 40% × 8, then 70% × 4).

05A warm-up that wears you out

The opposite fails too: 25 minutes of cardio + stretches + 10 activation drills = you reach your actual workout already drained. Over-warming burns the glycogen and focus your main sets need.

Rule: the warm-up ends when you feel warm and ready, not tired — usually 8–12 minutes max.