Effectiveness of a Per-Meal Protein Prescription and Nutrition Education with versus without Diet Coaching on Dietary Protein Intake and Muscle Health in Middle-Aged Women

• Published in: Nutrients 2022-01, Vol.14 (2), p.375
• Main Authors: Jackson, Kelley L, Gropper, Sareen S, Hunt, Dennis, D'Avolio, Deborah, Newman, David
• Format: Article
• Language: English
• Subjects: Aging; Aging - physiology; Analysis of Variance; Body mass index; Body weight; Chi-square test; Coaching; Diet; diet coaching; Dietary intake; Dietary Proteins - administration & dosage; Education; Female; Food; Food selection; Grip strength; Hand Strength - physiology; Health Education - methods; Humans; Meals; Mentoring; Middle age; Middle Aged; muscle health; Muscle strength; Muscle, Skeletal - anatomy & histology; Muscle, Skeletal - physiology; Muscles; Musculoskeletal system; Nutrition; Nutrition education; Nutrition research; Nutrition Therapy; Older people; Prescriptions; protein intake; protein prescription; Protein synthesis; Proteins; Risk; Sarcopenia; Sarcopenia - classification; Sociodemographics; Software; Statistical tests; Variance analysis; Walking Speed; Womens health
• ISSN: 2072-6643; 2072-6643
• DOI: 10.3390/nu14020375

Sufficient dietary protein intake is vital to maintaining muscle health with aging. Yet protein intake among adults is often inadequate. This study's main objective was to examine the impact of nutrition education (NE) and a per-meal protein prescription (PRx) with versus without diet coaching on protein intake. A secondary objective examined its effects on muscle health. Participants included 53 women, age 45-64 years. All participants received NE and PRx; those randomized to coached-group received 10-weeks of diet coaching. Assessments included: protein intake at baseline, weeks 4 and 12 and muscle health (muscle mass, grip strength, five-chair rise test, 4 mgait speed test). The Chi-square test examined percentages of participants meeting PRx between groups. Repeated measures analysis of variance assessed within group and intervention effects on protein intake and muscle health parameters. Protein intake (g/kg body weight) increased ( < 0.001): not-coached ( = 28) 0.8 ± 0.2 to 1.2 ± 0.3 and coached ( = 25) 1.0 ± 0.2 to 1.4 ± 0.3 with no significant difference between groups. A greater percentage of coached-group participants met ( = 0.04) breakfast (72%) and met ( < 0.001) three-meal (76%) PRx versus not-coached participants (25% and 53%, respectively). Participants in both groups exhibited significantly ( < 0.001) improved times for the five-chair rise test and 4 mgait speed test. Diet coaching in conjunction with a PRx and NE should be considered to assist individuals in improving protein intake through self-selection of protein-rich foods.