[Effectiveness of high intensity interval training in the cardiorespiratory capacity of people older than 65 years old: A systematic review]. / Efectividad del entrenamiento interválico de alta intensidad en la capacidad cardiorrespiratoria de personas mayores de 65 años, una revisión sistemática.

The objective of this review was to analyze the effect of HIIT on cardiorespiratory fitness, health-related quality of life (HRQL) and safety of its execution in people over 65 years of age. A systematic search was carried out, following the PRISMA recommendations, in 11 electronic databases, evaluating the resolution of the HIIT, affecting cardiorespiratory capacity as the main result and secondarily HRQL and safety of its execution, assessing the risk of bias using Rob 2.0 and ROBINS-I. Thirteen studies met the inclusion criteria, consisting of people >65 years, HIIT intervention >4 weeks, and studies assessing cardiorespiratory fitness. It can be concluded that HIIT improves cardiorespiratory capacity in people over 65 years of age, with respect to HRQL and the safety of its execution, the results are not conclusive. It becomes essential to unify criteria in intervention protocols, requiring further research in this regard.