A doorway pull-up bar is one of the cheapest ways to add a proper pulling exercise at home. It is also one of the few pieces of home gym kit that you hang your whole body weight from, over a hard floor. So the buying question is less "which looks best" and more "will this one fit my door, and hold me, with room to spare?"

Three ways a doorway bar attaches

Most doorway bars use one of three designs, and the design decides which doors they suit.

• Leverage (pressure) bars wedge against the frame. Your weight pushes the bar's ends into the frame, and nothing is screwed in. They need a fairly flat, solid frame on both sides and a width within the bar's stated range.
• Hook-over bars sit on top of the door frame, with padded hooks. They need enough frame depth for the hooks to sit securely, and the trim has to be strong enough to take your weight.
• Screw-in bars are fixed to the frame or wall with hardware. They are the most secure, but they need drilling, and you may not be allowed to do that in a rented home.

Whichever you pick, the frame is the weak link as often as the bar. Hollow or thin trim, old or cracked wood and loose frames are all reasons to choose something else, or to train elsewhere.

Check your door in 30 seconds

Measure the inside width of the door opening with a tape, then enter it below together with the bar's listed range and its listed maximum load. The checker also adds a safety margin, because a pull-up is not a dead hang: kipping, jumping up to the bar and swinging all push harder than your body weight.

Why the listed range matters

A leverage bar holds because the ends press outward against the frame. At the extreme end of its range the bar is nearly flat or nearly fully extended, and it grips less well. That is why the checker flags a door within a few centimetres of either edge. Measure the opening itself, not the wall around it, and measure at bar height, since frames are not always parallel.

Why 1.5 times your weight

A listed load is a number from the maker, not something we have checked. A slow pull-up loads the bar with roughly your body weight, but jumping up, swinging or kipping adds force on top. Asking for a rating around 1.5 times your weight leaves room for that. A higher listed number is not a promise of safety either: the weakest part is often the door frame.

Before you hang from it

• Test the bar with a slow, partial weight first, with your feet still on the floor, before you hang fully.
• Check it again every few sessions. Bars can shift as frames and padding settle.
• Remove it when you are not using it if it is a leverage bar, and keep children and pets away from it.
• If a door frame creaks, flexes or marks, stop and use something else.

Can't do a pull-up yet? That is normal for a beginner. Hanging with your feet on a chair, slow lowering from the top, and bands for assistance all build toward it. If you have shoulder, elbow or wrist pain, or a heart or other health condition, check with a doctor or physio before you start hanging your weight from your arms.

What to look for

At the lowest budget, the things that matter are a width range that includes your door, padded contact points that will not mark the frame, and a listed load comfortably above your weight. In the middle, look for a sturdier build, wider and more comfortable grips, and a clear stated range and load. At the top, look for a wide adjustable range, a high stated load and mounting that stays put. Whatever the price, if you can only find a vague listing with no range or load, treat it with caution.