It is rare for a woman to do a single chin-up. It is rarer still for a tall woman to do a chin-up. Years ago I began working out a 5'9" woman who could do three chin-ups. Her routine had been to do three chin-ups followed by several demanding negative reps every Friday at 5:00 for more than a year. She worked hard but she never improved. She was not remotely close to conpleting a fourth repetition.
This woman would do a whole body strength training workout once or twice week and use the aerobic equipment other days.
Her trainer resigned and I began training her. On the first Friday she insisted on doing chin-ups. It told her she had nothing to lose by taking a week off from that one exercise. She reluctantly acquiesced. She came in the next Friday with a negative mindset, fully expecting to be weaker. She did four chin-ups. She was amazed. When I asked her to forgo chin-ups the week after that she complied.
From this article Printers 'as unhealthy as cigarettes':