Plenty of women don't need to lose weight but would like a firmer middle. Crunches are the classic answer, and plenty of people dislike them. They strain the neck and work only a narrow band of muscle.

This yoga-based plank variation is a better alternative. It works the deep core muscles that hold you upright, it's gentle on the neck and it takes a couple of minutes. Before the how-to, though, there's something the original "magic move" post didn't say.

Directions for use

  • You can't burn fat from one spot. Ab exercises strengthen the muscles underneath; they don't remove the fat on top.
  • Belly fat shrinks with overall activity, sleep, stress care and diet, not with one exercise.
  • A stronger core still matters: better posture, easier everyday movement and less back strain.
  • Aim for the CDC baseline of 150 minutes of moderate activity a week plus two strength sessions.

The move: knee-to-chest plank

  1. Start on your hands and knees, shoulders directly over your wrists and hips over your knees.
  2. Step back into a plank: curl your toes under and straighten your legs so your body forms a line from head to heels. Keep your shoulders stacked over your wrists.
  3. Draw your right knee towards your chest, rounding your upper back slightly and letting your head relax between your arms. Aim the knee towards your nose, but don't force it.
  4. Keep your hips low, level with your shoulders rather than piking up.
  5. Hold for 5 breaths, breathing slowly through your nose. Return the foot to plank.
  6. Repeat with the left knee. That's one round. Work up to 3 rounds per side.

Breathe the whole way through. Holding your breath is the most common mistake, and steady breathing is what makes this feel calm rather than punishing.

Make it easier or harder

  • Easier: do it from a kneeling plank, with your knees down, and draw one knee forward at a time. Or place your hands on a sturdy bench to take weight off your wrists.
  • Harder: hold each knee for 10 breaths, or move slowly from knee-to-chest into a three-legged downward dog between reps.

What this move does, and doesn't do

Mayo Clinic describes a strong core as the foundation for almost every movement: carrying shopping, turning, bending and balancing. Planks and their variations train the deep abdominal and back muscles together, which is why they're a staple of physical therapy.

What they don't do is remove belly fat. Harvard Health notes that fat around the middle, especially the deeper visceral fat around the organs, responds to overall activity, diet, sleep and stress. It becomes more common around menopause as hormone levels shift. Spot exercises tone what's underneath; lifestyle shrinks what's on top.

A weekly plan that actually works

  • Move most days. Brisk walking counts. The CDC recommends at least 150 minutes a week of moderate activity.
  • Strength-train twice a week. Include the plank above plus moves for legs, back and arms. Muscle mass naturally declines with age, and strength work protects it.
  • Sleep 7 to 9 hours. Short sleep is linked with weight gain around the middle.
  • Mind the drinks. Sugary drinks and alcohol are easy calories that add up.
  • Eat plenty of fibre and protein, which keep you full. Our three big salads and vegetable omelette are easy places to start.

A note of caution

Skip plank variations, or ask a physiotherapist for a modified version, if you are pregnant, are recovering from abdominal surgery or childbirth (especially if you have a gap between the abdominal muscles, known as diastasis recti), or have wrist or shoulder injuries. Stop if you feel pain in your lower back.

The bottom line

The knee-to-chest plank is a great crunch replacement for a stronger, more stable middle. Pair it with regular walking, some strength work and good sleep. That combination changes your waistline, not any single move.