How to get rid of lactic acid in your legs: what actually works

Here's the fact that reframes the whole question: your body clears lactate from working muscle within about an hour of stopping. If your legs still ache tomorrow, lactic acid left the scene long before the soreness arrived.

Your body clears lactate from working muscle within about an hour of stopping.

So there are really two problems hiding in this question. The burn during exercise. And the soreness after. Different causes, different fixes.

01

The burn during exercise

Hydrogen ions dropping muscle pH. Happens live, mid-session.

02

The soreness after

Muscle damage and inflammation. Peaks 24-72 hours later.

The options, compared

The burn during exercise

When you push past threshold, muscles produce hydrogen ions faster than they clear them. pH drops and force fades. Lactate gets produced at the same time, which is how it got framed for a crime it didn't commit; it's actually recycled as fuel.

You can't "flush" the burn mid-session with water or massage. What you can do:

Pace below threshold for longer. Training raises your lactate threshold, which is the single biggest lever. Threshold intervals, tempo work, consistent blocks. There's no supplement version of this.

Active recovery between efforts. Easy movement clears lactate faster than standing still. Keep moving between Hyrox stations or intervals rather than bending over your knees.

Buffer before you start. This is where supplements have real evidence. Sodium bicarbonate at 0.2-0.5 g/kg improves high-intensity performance, and daily beta-alanine builds your internal buffer over weeks. We compared every option, including our own, in our buffer supplement guide.

The soreness after

Next-day soreness is DOMS: microscopic muscle damage and the inflammation that follows, peaking 24-72 hours after hard or unfamiliar work. Lactic acid plays no part at that point.

What helps: easy movement, sleep, adequate protein, and time. What's oversold: anything promising to "flush lactic acid" the day after a session. The lactate is already gone.

What about supplements to reduce lactic acid?

Be precise about what you're buying, because the label category is muddled.

Products with sodium bicarbonate or beta-alanine at research doses target the burn, and the evidence is solid. Lactate-salt products have mixed evidence; we've graded all of it in do lactic acid buffers actually work?

Electrolytes earn their place on a different claim: magnesium and potassium contribute to normal muscle function and reduced tiredness. That's the job our Lactic Acid Buffer does daily: 1g lactate, full electrolyte panel, 1g taurine, every dose on the label.

And nothing in a pouch outranks a well-built training block. Supplements sharpen the edge; training forges it.

Lactic Acid Buffer - Peach Lemonade

Lactic Acid Buffer - Peach Lemonade

£29.99 · 30 servings · £1 a serving

or £26.99 on subscription

All 10 doses printed on the label

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FAQ

Blood lactate typically returns to baseline within 30-60 minutes of stopping exercise, faster with easy active recovery. Soreness the next day is DOMS, which is muscle damage rather than lactic acid.

Massage may help you feel better, but lactate clears on its own within the hour regardless. Any benefit from massage relates to soreness and perceived recovery, and the effect on DOMS is modest.

Sodium bicarbonate has the strongest evidence for buffering acidity during high-intensity exercise. Beta-alanine works over weeks by raising muscle carnosine. Lactate-based buffers have mixed evidence. No supplement removes soreness the day after training.