A non-randomized repeated-measures controlled clinical trial was conducted with convenience allocation of participants into intervention (n = 18) or control group (n = 17). Due to ethical reasons, it was not possible to randomize the patients.~The investigators invited from different associations in Granada city and its province through word and mouth or by telephone to 45 volunteer informal caregivers. 40 of them enrolled in this study but only 37 finalized the program, 24.3% male and 75.7% female with a mean (SD) age of 44.03 (7.30) years. The people that have previous experience in mind body practices or cardiovascular diseases were excluded. All the caregivers received information about the study and informed consent was obtained from all participants. This study was approved by the CEI-GR (C-9) ethics committee and followed the principles of the Declaration of Helsinki. Convenience sampling was used to assign caregivers to the control or experimental groups.
The aim of the present study was to investigate in high burden caregivers the effects of a face-to-face meditation program during four weeks (16 hours) on physiological parameters, psychological state and vagal nerve activity comparing with a control group.