"difficult in walking" is a grammatically correct phrase and can be used in written English.
It describes a difficulty or struggle experienced while walking. Example: After her injury, Jane found it difficult in walking for long periods of time.
There has been increasing interest in walking robots which can walk over uneven terrain where it is difficult for wheeled or crawler type robots to travel.
In the seventies, when skill, craft, and mastery went out of fashion, a lot of visual artists moved into performance works that were considerably less entertaining than "happenings" — live or filmed or videotaped presentations of oneself doing something not particularly difficult, like walking a straight line in the studio.
Some will say, with a measure of justification, that the players should have adapted but it is difficult in any walk of life to settle for something inferior when you have sampled success brought by the best.
"Sometimes I have a difficult time walking".
It was a little long, and the hyena found it difficult to walk in my high-heeled shoes.
Avoid hard-soled boots, shoes with heels or tough soles, and shoes that are difficult to walk in.
Remember that the closer together your legs are when you take the measurements, the more close-fitting and difficult to walk in the skirt will be.
But despite this starring role in urban life, too many streets worldwide are treated like bit players -- smothered in traffic, difficult to walk and bike around, bad for business and harmful to public health.
It is difficult to distinguish walking from the other activities since the tour was associated with brisk walking, frequent short stops, slow walking speed, and potentially high uncertainties in the coding of this type of activity.
It is difficult to walk 20 blocks in Manhattan without encountering one or two cyclists who prefer dodging pedestrians to dodging trucks -- often doing so, in my experience, with a serious attitude of entitlement.
