Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not as challenging

This was my first walking dvd. I did the entire exercise, used 3 lb. hand weights during the boosted portions, and didn't feel challenged. I've since purchased 5 Fat Burning Miles, Walk Slim 4 Really Big Miles, and Walk Slim 4 Fast Miles with both of the 4 miles dvd's being my favorites. These videos are fast paced throughout unlike the 5 Mile Walk.