Effects of a blended home-based exercise program and protein counselling in community dwelling older adults: results of the VITAMIN RCT

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Purpose: With the ageing population, there is an increasing demand for strategies to optimise muscle mass, strength and physical performance in community dwelling older adults. We designed a new innovative e-health intervention "VITAMIN" to improve physical performance in older adults. The blended home-based exercise intervention contains digital support to improve personalised coaching as well as dietary protein counselling. This study evaluates the 6 months effectiveness of the intervention. Methods: The cluster RCT included 245 community dwelling older adults (age = 55y) randomised to control, exercise, and exercise+dietary protein counselling group. Data was collected at baseline and after 6 months of intervention. The primary outcome was the modified Physical Performance test (mPPT) with an emphasis on daily functioning. Secondary measures were gait speed (GS; m/s), physical activity level (PAL), protein intake (g/kg/d), appendicular skeletal muscle mass by DXA (ASMM; kg), hand grip strength (HGS; kg). For statistical analysis SPSSv24.0 was used. A mixed models analysis was performed, with group, time and group*time interaction as fixed factors, subject and cluster as random factors, and additional posthoc Bonferroni test. Results: Mean age of the 224 evaluated participants was 72.0±smn;6.5y, 71% were females and 44% low educated. No significant intervention effect was found for mPPT (p=.889). Secondary outcomes showed a significant intervention effect: GS (p=.002), PAL (p=.014), protein intake (p<.001), ASSM (p=.029),HGS (p<.001). Posthoc Bonferroni showed that exercise+protein group had statistical improved outcome compared to control for these secondary outcomes (p<.001; p=.003; p<.001; p=.009; p<.001). Control group showed declined values at 6 months compared to baseline for GS (D-.23 m/s), PAL (D -.03), ASSM (D -.32 kg) and HGS (D -.96 kg).Conclusions: Older adults had already very high scores for physical performance (mPPT), however the blended home-based exercise intervention with protein counselling was still effective for gait speed, physical activity level, dietary protein intake, muscle mass and strength. This personalised innovative e-health intervention showed to be a promising strategy for community dwelling older adults for maintenance instead of declining physical function.
Original languageEnglish
Title of host publicationAbstract book for the ISBNPA 2019 Annual Meeting in Prague
Place of PublicationPrague
PublisherInternational Society of Behavioral Nutrition and Physical Activity
ChapterO15, O15.5
ISBN (Print)9781732401112
Publication statusPublished - 5 Jun 2019
EventInternational Society of Behavioral Nutrition and Physical Activity (ISBNPA) : 18th annual meeting - Prague, Czech Republic
Duration: 4 Jun 20197 Jun 2019


ConferenceInternational Society of Behavioral Nutrition and Physical Activity (ISBNPA)
Country/TerritoryCzech Republic
Internet address


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