Question. my friend has a bad back. cant do but like 35 mins of the bike before it bothers him. cant lift anything that strains his back and cant do many crunches before his back hurts too. anyone know a low back impact cardio he could do? how are those cardio balls? or whatever they are. and is there anything that he can do to make his neck bigger? exercise wise? he wants to get his stomach off but hard with his back acting up. thanks.
-max.
-max.