The repetitive motion may involve lifting of heavy loads, repeated pressure against a sharp surface, or an awkward posture held for long periods of time. (newjerseyworkerscompensationlaw.com)
The design is a dead simple rectangle with rough angles, but it's thin, light, and easy to hold for long periods of time without getting tired. (businessinsider.com)
There are no set of rules as to how often you should hold your baby, and holding them for long periods of time does not spoil them. (organic-baby-resource.com)