Jurado-Fasoli L, et al. - A randomized controlled trial was performed to assess the impact of different training modalities on sleep quality parameters. In this study, a sum of 69 (52.7% women) middle-aged sedentary adults were assigned randomly to control group, physical activity recommendation from the World Health Organization, high intensity interval training, and high intensity interval training group adding whole-body electromyostimulation training (HIIT-EMS). Applying the Pittsburgh Sleep Quality Index (PSQI) scale and accelerometers, sleep quality was measured. In sedentary middle-aged adults, exercise training induced improvement in subjective sleep quality. Furthermore, after 12-weeks of exercise intervention, HIIT-EMS training recorded an improvement in objective sleep quality parameters (total sleep time, sleep efficiency and wake after sleep onset). It was found that the changes seen in the HIIT-EMS group were not statistically different to the other exercise modalities.