Dietary protein intake and its association with physical fitness test among older adults with pre-sarcopenia and sarcopenia: A cross-sectional study

Abstract

Background Low protein intake and physical inactivity are factors that associated with muscle deterioration and poor physical performance among older adults. Aim To assess the association between dietary protein intake and physical fitness tests among older adults with pre-sarcopenia and sarcopenia. Methods A total of 110 older adults were recruited through a convenience sampling method. Data including sociodemography, anthropometry, body composition, medical history, and dietary protein intake were obtained through the interview-administered method. Results Most of the subjects have low household income (<RM 3030) (90%), Malay ethnicity (66.4%), and are married (64.5%). 74.55% of the subjects were pre-sarcopenic, whereas 25.45% were sarcopenic. Those with sarcopenia were mostly underweight (± 21.78 kg/m2), whereas those with pre-sarcopenia had a slightly higher Body Mass Index (BMI) (± 27.30 kg/m2). Both men and women did not meet the dietary protein requirement (± 43.86 g/ day) based on the Recommended Nutrient Intake (RNI) of 2017. Moreover, both pre-sarcopenic and sarcopenic subjects have reduced functional ability. Although no significant differences were found in the Short Physical Performance Battery (SPPB) score, those with sarcopenia had poorer physical performance than those with pre-sarcopenia (82.1% versus 69.5%). Apart from that, there was a significant association between the 2-min step test (2MST) and dietary protein intake among those with pre-sarcopenia ( r-value = 0.252). Conclusion In conclusion, lifestyle interventions among older adults are important, including ensuring adequate protein intake and encouraging appropriate physical activity to enhance muscle mass, strength, and performance to improve their daily life efficiency and quality of life.