Why these changes were made: - Added a full stop after “hard” for clarity. / - Changed “make it faster through running” to “speed it up by running” — more natural phrasing. / - Changed “joints can’t bear it” to “her joints can’t bear the strain” — clearer and more natural. / - Changed “There’s nothing to do with it” to “There’s nothing that can be done about it” — correct expression for lack of solution. / - Changed “it will more and more severe due to aging” to “it will get worse as she gets older” — more natural and grammatically correct. / - Changed “try to cope with it” to “try to manage it” — slightly more natural and common phrasing in British English.