Jiménez Jiménez, P., Vidal Vilaplana, A., Nuñez-Sánchez, J. M., & Gregori Faus, C. (2024). The Net Promoter Score in low-cost fitness centres: A comparative analysis according to gender, business and autonomous communities. SPORT TK-EuroAmerican Journal of Sport Sciences, 13, 53. https://doi.org/10.6018/sportk.577271