170 is my goal weight currently 145 . Going to the gym is the easy part . The diet part is hard . I don ' t eat unhealthy . I just don ' t eat enough <| sep |> I didn ' t say the other lines aren ' t supposed to be defensively responsible , just the checking line needs to be a tad more so due simply to the nature of their role . Your last point comes down to personnel . If the coach is limited in his options , his checking line may be limited offensively no matter what he tries . I also already acknowledged that the best checking lines are ones that can be a threat to score goals , even against the other team ' s top forwards . In terms of the 4 th line , it varies across the league based on what the coach wants , either energy or more possession .