Why do I get dizzy during deadlifts?
Last updated September 3, 2026.
Breath-holding under heavy load swings your blood pressure, and the exhale at the top is when the head rush lands. Straining with a held breath raises chest pressure and reduces blood return to the heart; releasing it drops that pressure fast, and standing tall under a bar at the same moment makes it worse. The NHS lists standing up too quickly, not eating or drinking enough, and heat as common fainting triggers, and heavy sessions stack all three. Continuous breathing, slower lockouts, real rest between sets, and food and fluids beforehand fix most cases. Recurrent dizziness, chest pain, palpitations, or an actual faint means see a GP.
What to do
- Breathe through reps: short brace, exhale through the effort, no marathon breath-holds.
- Stand up into lockout smoothly instead of snapping your head and chest up.
- Eat and drink before training; fasted, dehydrated lifting invites the head rush.
- Sit immediately if you feel grey; the floor is better than the fall.
- See a GP for repeated dizziness, chest pain, palpitations, or actual fainting.
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