

Lifting gets all the attention, but the carry is where a lot of back trouble quietly builds. Once something is in your arms, every step is more work for your back, and the further you go the more it adds up. How you hold it, how heavy it is and how far you go all change how much your back has to do.
This is the one that matters most for carrying. A load held out in front of you, or off to one side, pulls on your back with every step, and the further out it is, the harder your back works to balance it. Holding it in close to your body, hugged against your stomach or chest, keeps the weight over your base and your back doing far less. If a load is too bulky to hold close, that is often a sign to split it or use an aid instead.
A weight you can carry comfortably across a room is a different thing over a long distance. It is worth matching the size of the load to how far it has to go, taking smaller loads when the carry is long. Two lighter trips are often easier on the back than one heavy haul, even if it feels less efficient in the moment. Where you can, using a trolley, sack truck or barrow for longer carries takes the load off your back entirely.
Carrying everything on one side, like a heavy bag or tool in one hand, tips your body and makes your back work to hold you upright the whole way. Splitting the load between both hands, or swapping sides regularly, keeps you more even and takes that constant sideways strain off. When a load is shared evenly, your back can stay in its comfortable, upright line rather than leaning to counter the weight. Little adjustments like these add up over a day of carrying.
A bit of planning saves the back a lot. Clearing your route, knowing where you are setting down, and making sure your path is not blocked means no awkward shuffling or twisting mid-carry. On a long or heavy carry, setting the load down for a moment to rest, rather than pushing on until your back is fatigued, keeps things fresher. Setting down with the same care you picked up, close and using your legs, finishes it safely.
If your back is tired after a lot of carrying, gentle movement usually helps it settle more than sitting straight down. A short walk, easing your back through a comfortable range, or a little warmth often take the edge off. Staying gently active tends to help more than stiffening up. What works varies from person to person, so it is worth seeing what settles yours.
If you would like to try a guided back stretch, VIDA has a short video you can follow at your own pace.