There is a greek paper which analyzes how important is the exercise in people with schizophrenia. The paper belongs to John Theodorakis from University of Thessaly and maybe will be help you. You can find it attached.

Marianna - thank you for the article!

Hi Heidi, I'm currently researching about the relantionship between mindfulness and QoL in psychotic patients from a public community center, so negative symtpoms is a topic i find very interesting. There is a meta analysis (Khoury et al.,2013) that partly addresses the effect of mindfulness in negative symptoms. If you have any question or want more information don’t hesitate to contact me. Kind regards 

Khoury, B., Lecomte, T., Gaudiano, B. A., & Paquin, K. (2013). Mindfulness interventions for psychosis: A meta-analysis. Schizophrenia Research, 150(1), 176–184. 10.1016/j.schres.2013.07.055

Thank you so much Emilio. That is very helpful and I will look up that article. That will help a lot. Heidi

Here are some recent work I am aware of that may be partly relevant to your interest:

Schizophr Res. 2014 Aug;157(1-3):182-9. doi: 10.1016/j.schres.2014.05.025. Epub 2014 Jun 10.

The role of dysfunctional attitudes in models of negative symptoms and functioning in schizophrenia.

Quinlan T1, Roesch S1, Granholm E2.

Author information

Abstract

Neurocognitive impairment is associated with negative symptoms and poor real world functioning in schizophrenia. Dysfunctional attitudes (e.g., "If I fail partly, it is as bad as being a complete failure") have been found to mediate these relationships between neurocognition and negative symptoms and functioning. In this study, these relationships were examined in 179 participants with schizophrenia or schizoaffective disorder using structural equation modeling. Defeatist attitudes were found to mediate the relationship between neurocognition and negative symptoms but not the relationships between neurocognition and performance-based or self-reported functioning. A full model with the best fit showed mediation between neurocognition and self-reported functioning through two different pathways: One from neurocognition to functional skill capacity to real-world functioning, and a second from neurocognition to defeatist attitudes to negative symptoms to real-world functioning. These results may implicate skill deficits and defeatist attitudes as a separate treatment targets for negative symptoms and functioning in schizophrenia.

Schizophr Res. 2014 Aug;157(1-3):312-3. doi: 10.1016/j.schres.2014.06.002. Epub 2014 Jun 24.

Mindful cognitive enhancement training for psychosis: a pilot study.

Tabak NT1, Granholm E2.

J Consult Clin Psychol. 2014 Dec;82(6):1173-85. doi: 10.1037/a0037098. Epub 2014 Jun 9.

Randomized clinical trial of cognitive behavioral social skills training for schizophrenia: improvement in functioning and experiential negative symptoms.

Granholm E1, Holden J1, Link PC1, McQuaid JR2.

Author information

Abstract

OBJECTIVE:

Identifying treatments to improve functioning and reduce negative symptoms in consumers with schizophrenia is of high public health significance.

METHOD:

In this randomized clinical trial, participants with schizophrenia or schizoaffective disorder (N = 149) were randomly assigned to cognitive behavioral social skills training (CBSST) or an active goal-focused supportive contact (GFSC) control condition. CBSST combined cognitive behavior therapy with social skills training and problem-solving training to improve functioning and negative symptoms. GFSC was weekly supportive group therapy focused on setting and achieving functioning goals. Blind raters assessed functioning (primary outcome: Independent Living Skills Survey [ILSS]), CBSST skill knowledge, positive and negative symptoms, depression, and defeatist performance attitudes.

RESULTS:

In mixed-effects regression models in intent-to-treat analyses, CBSST skill knowledge, functioning, amotivation/asociality negative symptoms, and defeatist performance attitudes improved significantly more in CBSST relative to GFSC. In both treatment groups, comparable improvements were also found for positive symptoms and a performance-based measure of social competence.

CONCLUSIONS:

The results suggest CBSST is an effective treatment to improve functioning and experiential negative symptoms in consumers with schizophrenia, and both CBSST and supportive group therapy actively focused on setting and achieving functioning goals can improve social competence and reduce positive symptoms.

TRIAL REGISTRATION:

ClinicalTrials.gov NCT00338975.