Training abs with a straight back doesn’t really work. Your abs is making your torso curve, if you're not performing that movement you don't really use the muscles in the optimal way. That's like holding a dumbbell in front instead of curling it up and letting it down
@@zoestyles5139 It exerts an equal amount of tension to the abdominal muscles as you go forward as long as you hold the weight without going all the way down as in this video. Check this out also. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SCPUjoLmAlo.html
@@Ishan15g Nautilus Plus ab/back machine circa 1985, but there are other machines that will do as much as long as you never rest the weights going back by holding it before you go forward on succeeding reps. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XcoNsUMsDRc.html
