About exercises bad for your back results of 10,000
08:48 49:01 10:29 04:59 10:53 03:37 04:44 02:58 06:03 04:44 04:15 04:39 07:14 08:23 06:23 04:45 05:18 07:26 12:12 18:10 04:24 07:31 04:15 11:50 16:08 08:22 06:46 10:15 10:01 02:50 04:06 07:06 33:07 05:16 12:21 03:09 03:04 02:00 02:53 01:50 14:44 23:15 19:19 14:59 00:39 03:17