in a fit (or unfit) physical state
健康状况良好（或不佳）
certainly not fit or well enough to do something
（健康状况，身体状况）不适宜做某事
you’re in no condition to tackle the stairs.
你的身体不适宜爬楼梯。
with the stipulation that
如果…就；只有在…条件下
I got three years' probation, on condition that I stay at the hostel for a year.
我得到三年试用期，条件是我必须在招待所呆满一年。