Increasing awareness of the impact of frailty on elderly people resulted in research focusing on factors that contribute to the development and persistence of frailty including nutrition and physical activity. Most effort so far has been spent on understanding the association between protein intake and the physical domain of frailty. Far less is known for other domains of frailty: Cognition, mood, social health and comorbidity. Therefore, in the present narrative review, we elaborate on the evidence currently known on the association between protein and exercise as well as the broader concept of frailty. Most, but not all, identified studies concluded that low protein intake is associated with a higher prevalence and incidence of physical frailty. Far less is known on the broader concept of frailty. The few studies that do look into this association find a clear beneficial effect of physical activity but no conclusions regarding protein intake can be made yet. Similar, for other important aspects of frailty including mood, cognition, and comorbidity, the number of studies are limited and results are inconclusive. Future studies need to focus on the relation between dietary protein and the broader concept of frailty and should also consider the protein source, amount and timing.
Rationale: While combined lifestyle interventions have multiple health benefits, their impact on the oral microbiome is not known. We explored the effects of a lifestyle intervention including protein drink on the oral microbiome in older adults with obesity and type 2 diabetes (T2D).Methods: In a post-hoc analysis of the PROBE study, 87 subjects (66.5±6.1 years, 33% female) with tongue dorsum samples at baseline and week 13 were included. All subjects participated in a 13-week lifestyle intervention with exercise (3x/week) and hypocaloric diet (-600 kcal/day), and had been randomized to receive a test product (21g whey protein enriched with leucine and vitamin D) or isocaloric control (0g protein) 10x/week. T2D was subtyped as muscle insulin resistance (MIR, n=34) or no-MIR (n=36) based on available muscle insulin sensitivity index. Microbiome was analysed by V4 16s rDNA sequencing. Diversity, measured as species richness and Shannon diversity index, was statistically analysed with paired (within group) and independent (between groups) samples t-test.Results: displayed below. Conclusion: Consuming a whey protein drink enriched with leucine and vitamin D during a combined lifestyle intervention increased species richness of the oral microbiome in obese T2D subjects with muscle insulin resistance.
Introduction: Protein ingestion during recovery from exercise has been reported to augment myofibrillar protein synthesis rates, without increasing muscle connective protein synthesis rates. It has been suggested that collagen protein may be effective in stimulating muscle connective protein synthesis. The present study assessed the capacity of both whey and collagen protein ingestion to stimulate postexercise myofibrillar and muscle connective protein synthesis rates. Methods: In a randomized, double-blind, parallel design, 45 young male ( n = 30) and female ( n = 15) recreational athletes (age, 25 ± 4 yr; body mass index, 24.1 ± 2.0 kg·m -2 ) were selected to receive primed continuous intravenous infusions with l -[ring- 13 C 6 ]-phenylalanine and l -[3,5- 2 H 2 ]-tyrosine. After a single session of resistance type exercise, subjects were randomly allocated to one of three groups ingesting either 30 g whey protein (WHEY, n = 15), 30 g collagen protein (COLL, n = 15) or a noncaloric placebo (PLA, n = 15). Blood and muscle biopsy samples were collected over a subsequent 5-h recovery period to assess both myofibrillar and muscle connective protein synthesis rates. Results: Protein ingestion increased circulating plasma amino acid concentrations ( P < 0.05). The postprandial rise in plasma leucine and essential amino acid concentrations was greater in WHEY compared with COLL, whereas plasma glycine and proline concentrations increased more in COLL compared with WHEY ( P < 0.05). Myofibrillar protein synthesis rates averaged 0.041 ± 0.010, 0.036 ± 0.010, and 0.032 ± 0.007%·h -1 in WHEY, COLL and PLA, respectively, with only WHEY resulting in higher rates when compared with PLA ( P < 0.05). Muscle connective protein synthesis rates averaged 0.072 ± 0.019, 0.068 ± 0.017, and 0.058 ± 0.018%·h -1 in WHEY, COLL, and PLA, respectively, with no significant differences between groups ( P = 0.09). Conclusions: Ingestion of whey protein during recovery from exercise increases myofibrillar protein synthesis rates. Neither collagen nor whey protein ingestion further increased muscle connective protein synthesis rates during the early stages of postexercise recovery in both male and female recreational athletes.
Aanleiding Ondervoeding komt nog veel voor in Nederland, vooral bij zieken en ouderen. Dieetbehandeling bij ondervoeding bestaat uit eiwit- en energierijke voeding. Omdat de meeste verrijkte producten op dierlijke basis zijn, zijn verrijkte producten op plantaardige basis zeer beperkt. Hierdoor wordt de kans op effectieve dieetbehandeling van ondervoeding bij mensen die een plantaardige (plantbased) voeding willen gebruiken beperkt. Doel PROVE beoogt het plantbased assortiment eiwit- en energieverrijkte voeding te innoveren, vanuit samenwerking tussen leveranciers van plantaardige grondstoffen (Avebe), producenten van medische voeding (Nutricia), producenten/distributeurs van maaltijden (Van Smaak), zorginstellingen (Zorggroep Groningen, Martini ziekenhuis) en een hogeschool (Hanzehogeschool Groningen). Binnen PROVE wordt een pakket van wensen samengesteld rondom o.a. sensorische eigenschappen, productsamenstelling, houdbaarheid, milieugerelateerde eigenschappen en kosten door patiënten en diëtisten, voor een productconcept geschikt voor patiënten met (risico op) ondervoeding die plantbased willen eten. Hiermee willen we bijdragen aan de noodzakelijke verschuiving naar een meer plantbased en minder dierlijk voedingspatroon (eiwittransitie). Praktijkopbrengst Op basis van het pakket van eisen kan een plantbased productconcept worden ontwikkeld, dat bijdraagt aan een volwaardig voedingspatroon dat voorziet in de verhoogde voedingsbehoefte bij ondervoeding. Met de ruimere keuze in verrijkte producten kunnen patiënten die een plantbased voeding gebruiken hun voedingsinname en voedingstoestand beter behouden danwel verbeteren. Diëtisten zullen door een ruimere keuze aan verrijkte plantbased producten minder handelingsverlegen zijn in de dieetbehandeling van ondervoeding bij deze doelgroep. Innovatie Binnen PROVE brengen we alle schakels in de keten bijeen, van grondstof tot patiënt, waarmee we krachten bundelen en slagingskansen optimaliseren om als eerste consortium het plantbased assortiment voor patiënten met ondervoeding(srisico) uit te breiden. Vervolgonderzoek In vervolgonderzoek wordt op basis van het pakket van eisen dat voortvloeit uit het voorgestelde KIEM project een prototype van het productconcept ontworpen, waarna deze wordt geëvalueerd bij patiënten.
