The main objective of this study is to evaluate the effect of a 12 weeks adapted physical activity program (active walking) on depression by analyzing the dynamics of emotional and cognitive functioning. The secondary objectives are to test the effects of a physical activity on functional performance and to highlight psychological mechanisms.

Primary outcomes:

Self evaluations concerning global self-esteem, a perception of competence and satisfaction in the physical self and four sub-domains that are perceived physical endurance, perceived competence in sports, perceived physical force and perceived physical appearance, are performed.

Assessment of depressive symptomatology is also realised including momentary levels of depression, anxiety, rumination, efficacy of coping strategies and quality of life.

Secondary outcomes:

Assessment of postural control

Inclusion Criteria:

• Speaking French
• Aged between 18 and 65 years
• Diagnosed with current major depressive disorder
• BDI II score ≥ 12
• IPAQ score <600

Exclusion Criteria:

• Alcohol or substance(s) dependence(s)
• Psychotic disorders
• Anti-social personality
• Pregnant or nursing women
• Physical inability to perform active walking