Without belittling men further (although I so easily could!)
That's just ridiculous. First of all, you can lose weight WITHOUT exercise (technically although it takes longer and I don't recommend it). All you do is expend more calories than you consume. Obviously walking burns energy....heck...sleeping does that!! Secondly, if you walk briskly enough to get up your heartrate and sustain it....that's aerobic. You must consume 3500 more calories than you burn to gain a pound. Transversely, you must burn 3500 more calories than you consume to lose a pound....period...that's all...end of story...Does high impact cardio burn more calories faster...yes. Can you lose weight by 'just' walking....YES!!