Are trekking poles effective to help lose weight?

Maybe, a Little: As with most products, most is marketing. Primary controls of body weight: food choices and quantity. Most calories are burned in repairing & maintaining our body, not exercise, see: nusi.Org. 1 lb fat = 6-12 hrs intense workout. Exercise & building muscle mass can impact, but each takes a lot of work (best make it fun or you will not continue) & the primary issue is what you do most of the time.