Juan Felipe Reyes-Rodríguez

Night work is one of the most recognized responsibilities of security personnel. Feeling vital is a necessary condition for assuring proper development of this function. Thus, the analysis of its effects on physical and mental conditions is a relevant resource for achieving adequate results at individual and organizational levels. Based on a questionnaire applied to 184 private security guards in Colombia, this study examines the subjective vitality of the personnel working during night shifts and its association with self-perceptions regarding their physical and mental health. Additionally, it analyzes the interference that various demographic variables exert on these relationships. By using partial least squares structural equation modeling, the study found that subjective vitality significantly affects night workers’ mental health more than their physical health. That is, subjective vitality among respondents explains 51% of the variability of mental health and 36% of the variability of physical health. A further significant effect of physical health on mental health was also evidenced, in which the former explains the 25% of the latter variability. When comparing results between genders, the study shows that the variability of mental health explained by subjective vitality among women is larger than among men (75% vs. 28%). These results are discussed in light of the theoretical aspects of organizational behavior and are grounded around their potential to address the phenomenon of human resource management in practice. Practical implications include the need for organizational schemes that balance physical and mental health among night workers.

Acknowledgments
The authors want to acknowledge the 184 Colombian security guards who provided their time to complete the questionnaire for this study.

Unlocking the potential of small and medium-sized enterprises hinges on grasping the underlying principles driving the development of sustainability-oriented innovations. It empowers this community of firms to contribute to sustainability and, at the same time, generate value. In this sense, drawing on the sustainable value creation model, the purpose of this study is to propose a framework for sustainability-oriented innovations in small and medium-sized enterprises by analyzing various strategic approaches. The study employs a theoretical approach aligning conceptual foundations with sustainability-oriented innovations. The study utilizes the sustainable value creation model and identifies four strategies suitable for small and medium-sized enterprises: (i) pollution prevention, (ii) product stewardship, (iii) clean technology, and (iv) sustainable vision focused on the base-of-the-pyramid. Further, portfolios of sustainability-oriented innovations, framed in each of the four strategies and in the context of small and medium-sized enterprises found in the literature are discussed. To illustrate each strategy, the analysis of four small and medium-sized enterprises operating in Colombia is conducted. The findings demonstrate how these strategies, combined with the implementation of portfolios of sustainability-oriented innovations, generate value in small and medium-sized enterprises, while promoting sustainability in the case of the context of an emerging economy. Moreover, the study suggests that small and medium-sized enterprises can effectively adopt a strategic orientation toward designing and implementing portfolios of sustainability-oriented innovations. Ultimately, the study highlights the potential of small and medium-sized enterprises in developing economies to contribute strategically to sustainable development, given their unique characteristics.