Are no-screw doorway bars safe for heavier users?

For most adults they're fine, but community consensus is cautious: pressure-fit and friction designs are the ones reviewers call 'notoriously unsafe' and link to fall videos. Leverage bars that rest over the door frame are generally considered more secure. If you're a heavier lifter or plan to do dynamic moves like muscle-ups, reviewers steer you toward wall-mounted or freestanding options rated 440–500 lbs.