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M-position & baby’s back: ergonomic babywearing explained | Hoppediz

M-position & baby’s back
Ergonomic babywearing explained in detail

When people talk about ergonomic babywearing, two aspects come up again and again: the M-position (spread-squat position) and an age-appropriate baby’s back that is gently supported in its natural curve. On this page you’ll find a well-founded, easy-to-follow guide – so you can assess carrying positions more confidently and adjust them safely.

Important: this isn’t about rigid rules, but about age-appropriate support – adapted to your baby’s development.

Why posture matters so much in babywearing

Hips, spine and muscles develop over time – carrying can support this sensibly

Babies are born with an immature musculoskeletal system. Hip joints, spine and the supporting muscles develop step by step – through closeness, movement and experience.

A good carry supports this development by holding your baby’s body evenly and securely, without pushing them into an “adult” posture.

What is the M-position (spread-squat position)?

The M-position is a practical term from babywearing – medically it’s often called the spread-squat position. Your baby’s legs are spread and flexed, with the knees higher than the bottom.

  • The hip joints are in an age-appropriate flexion and abduction.
  • The thighs are well supported along their length.
  • The hips can continue to develop in a favourable position.

Good to know: M-position and spread-squat position describe the same posture.

Your baby’s natural back curve when babywearing

Newborns naturally have a slightly C-shaped spine. This curve is a normal developmental feature.

In ergonomic babywearing, this natural, gently curved back is supported evenly – without actively “pulling the back straight”.

  • The fabric supports across the surface, without pressure points.
  • Your baby remains stable and upright in the carry.
  • There is no forced arching in the lower back.

Good to know: People sometimes say “rounded back”. In medical language, this term can describe a pathological change. In babywearing, what is usually meant is the natural, gently curved baby’s back that is supported in an age-appropriate way.

Further topics

If you’d like to go deeper