subway): variations of pull-ups and upper body strength exercises. • Benches: sit-ups, push-ups in variations, jumps, box jumps. • Stairs and hills: can be sprinted, jumped step by step, crawled up and down. • Free rails: different versions of push-ups, balancing, climbing, monkey-style crossing, slalom crawls. • Trees: traction, climbable, the possibilities depend on the tree. • Anything loose like stones, tires, anything heavy: lift it. • Cars and bikes: can be driven from the sidewalk, used as motivation to speed up. Nevertheless, parkour and associated movements are not likely to be widely adapted by society. Thus, advice and encouragement in the city could encourage alternative use of urban features, for example signs showing possible exercises in using street furniture, or slogans and questions that stimulate creativity. In some places in New York, people are more likely to use park furniture in other ways, such as in East River Park. Therefore, role models or leaders whose behavior will be copied by others can have an effect like this.