How the physical demands shift when your baby starts moving
Nicola Tik
The first six months of parenthood are dominated by sustained holding and continuous close contact. As a baby moves through the second half of their first year, that pattern begins to change. The demands on your body do not necessarily become easier, but they do become different, and understanding how they shift makes it easier to manage the new set of physical challenges this stage brings.
In the early months, the primary physical demand is holding. A young baby needs to be supported continuously, and the load falls on the same muscles in the same positions for extended periods. From around six months, as babies begin to roll, sit, reach, and eventually crawl and pull to stand, the nature of the physical demand shifts considerably.
The load becomes more dynamic and less predictable. Rather than sustained static effort, the body is now responding to a baby who moves, shifts position, and requires intervention at unpredictable moments. Reaching across to redirect, bending to retrieve, and lifting from a range of positions replaces the sustained holding of the earlier stage. This variety is in some ways easier on the body, but it introduces its own demands, particularly around the lower back, hips, and knees.
As babies become more mobile, much of the interaction between parent and baby moves to the floor. Floor play is genuinely good for a mobile baby, and it is also one of the more demanding environments for the parent's body if it is not approached with some awareness.
Sitting on the floor for extended periods, kneeling, cross-legged sitting, and moving between positions repeatedly all place sustained demand on the hips, knees, and lower back in ways that are quite different from chair-based sitting. Getting up and down from the floor repeatedly through a play session adds a pattern of lower limb and lower back loading that accumulates across the day.
Leaning forward to engage with a baby on a play mat encourages a sustained forward bend through the upper and lower back that, repeated across many floor sessions, concentrates load at the base of the spine in a similar way to the bending and reaching of the earlier stage. Sitting back on the heels or moving to a side-sitting position regularly, rather than staying in one floor position for the whole session, helps vary where the load falls and gives the lower back and hips more recovery opportunities.
Lifting a baby from floor level is more physically demanding than lifting from a cot or raised surface, because the distance the back has to travel is greater and the position at the bottom of the lift is more compromised. As babies become more mobile, floor-level lifting becomes more frequent, often happening unpredictably and in a hurry.
The lower back is particularly vulnerable during floor-level lifting because the temptation is to reach forward and round through the spine to get low enough quickly. Where it is practical, bending the knees to lower the body closer to the baby before lifting, and keeping the baby close to the body throughout the movement, reduces the demand on the lower back considerably. This becomes easier with practice and more natural over time, even when it feels effortful initially.
Beyond the specific mechanics, the 6 to 12 month stage introduces a different kind of physical tiredness. The sustained but relatively static effort of the early months gives way to something more varied and reactive. Following a mobile baby, responding quickly to unexpected movement, and managing a baby who is increasingly interactive and unpredictable is physically engaging in a way the earlier stage was not.
This shift can catch people off guard. The early months are exhausting in a way that feels obvious and understandable. The later stage can feel equally tiring but harder to account for, because no single activity seems particularly demanding. The cumulative effect of a day of dynamic, varied, ground-level physical effort is real, even when each individual movement feels minor.
If you have a few minutes, VIDA has short videos you can follow, which can help ease the tension that builds across the lower back, hips, and shoulders during this stage.