Barriers	N	Mean rank	SD	Group differences
Anxiety/depression	458	3.54	2.12	All
Low levels of activity at baseline a	458	3.99	2.17	All, except b, c, d
Helplessness b	458	4.20	1.90	All, except a, c, d
Pain with exercise c	458	4.26	2.21	All, except a, b, d
Low self-efficacy d	458	4.30	2.10	All, except a, b, c
Forgetting e	458	5.00	2.26	All, except f
Lack of time f	458	5.02	2.71	All, except e
Lack of social support	458	5.69	2.07	All