options: f : so we need to do eat less to gain more weight . f : so we need to do gentle exercise to gain more weight . f : so we need to moving constantly to gain more weight . f : so we need to moving constantly to gain less weight .
article: m : researchers in america did some experiments to try to figure out why some people gain weight more than others do . f : yeah , some people can eat whatever they want and they never seem to gain a pound . m : in this study , volunteers were given 1000 extra calories a day . about 2 pieces of cheese 's worth of extra intake . f : this kind of study i 'd like to be in . m : well , anyway , there 're also world special equipment that recorded how much they moved . you know , walking up and down steps . everybody gained weight . but some people gained much less than others . the secret keeping on moving .