Does Yoga Build Core Strength?
Without a Single Crunch

Ask most people what core work looks like and they will mime a sit-up. Fair enough - that is what we were all taught. The muscles around your middle, though, spend almost none of their real working life curling your ribs towards your hips.

What they actually do is hold you steady while your arms and legs get on with things. Which, as it happens, is more or less a description of yoga. Our yoga for core strength classes lean into that.

Holding Still Is the Work

In a plank, nothing moves. That is exactly why it is hard. The same goes for a long-held Warrior III, or standing on one leg while the other reaches back - the middle of your body works constantly to stop you folding or twisting. That kind of steadying work carries over well into ordinary life: carrying shopping, lifting a child, standing through a long queue. Long holds also give the deeper stabilising muscles time to switch on, which quick reps often skip past.

Five Shapes That Earn Their Keep

Quality beats duration here. If your low back starts to sag or your breath disappears, come out, rest, and go again.

• Plank - the whole front and side of the body working together. Ten good seconds beats a shaky minute.
• Side plank with the lower knee down - brings in the muscles along the side of the waist that crunches never reach.
• Boat pose - a strong, honest hold for the front of the body. Bend the knees as much as you need.
• Bird dog - opposite arm and leg reaching, everything else still. Excellent for the deep stabilisers.
• Warrior III with hands on a wall - balance plus a long hold. Hard in a way that sneaks up on you.

Breathing Is Part of It

Here is a good test: hold a plank and try to breathe normally. If you cannot, you are gripping rather than working. The core is meant to stabilise while the ribs and diaphragm keep moving, and that coordination is trainable. Practising it also makes everything else easier, because the breath is what carries you through the second half of a long hold.

How Often, and What to Expect

Three sessions a week that include some core work is plenty. Most people notice the difference first in unglamorous places: standing feels less effortful, the plank that was ten seconds becomes thirty, getting up off the floor takes less negotiation. Visible change takes longer and depends on plenty besides exercise. Results vary. A stronger middle also tends to support the lower back, which is a welcome side benefit.