Ingen effekt av vassleprotein i samband med träning hos medelålders överviktiga

[King Grub]

Little is known about the effects of different quantities of whey protein on exercise training–induced changes in body composition and indices of metabolic syndrome in middle-aged overweight and obese adults. Therefore, we examined the effects of consuming 0.8-MJ supplements with 0 (n = 126), 10 (n = 112), 20 (n = 44), or 30 (n = 45) g whey protein twice daily in conjunction with resistance (2 d/wk) and aerobic (1 d/wk) exercise training in a double-blind, randomized, placebo-controlled, community-based 9-mo study in men (n = 117) and women (n = 210; age: 48 ± 7.9 y; BMI: 30.0 ± 2.8 kg/m2). Whey protein supplementation did not influence any of the following outcomes, some of which were affected by training. Among all participants, strength increased by 15 ± 12% (P < 0.001) and maximal oxygen uptake capacity (VO2max) increased by 9 ± 15% (P < 0.001). Body weight was unchanged (0.1 ± 3.7 kg, P = 0.80), lean body mass increased by 1.9 ± 2.8% (0.95 ± 1.3 kg, P < 0.001), and fat mass decreased by 2.6 ± 9.4% (−0.86 ± 3.1 kg, P = 0.001). Oral-glucose-tolerance testing showed that plasma glucose AUC was unchanged (−18.0 ± 170 mmol/L·  3 h, P = 0.16), insulin AUC decreased by 2.6 ± 32% (−7.5 ± 29 nmol/L·  3 h, P = 0.01), and HOMA-IR (0.2 ± 2.0, P = 0.81) and the insulin sensitivity index (0.3 ± 3.0, P = 0.63) were unchanged. Plasma concentrations of TG; total, LDL, and HDL cholesterol; C-reactive protein; plasminogen activator inhibitor-1; blood pressure; and waist circumference were unchanged. Whey protein supplementation did not affect exercise training–induced responses in body composition and indices of metabolic syndrome in middle-aged overweight and obese adults who maintained body weight.

Whey Protein Supplementation Does Not Affect Exercise Training-Induced Changes in Body Composition and Indices of Metabolic Syndrome in Middle-Aged Overweight and Obese Adults. J. Nutr. June 20, 2012.

http://jn.nutrition.org/content/early/2012/06/19/jn.111.153619.full.pdf+html

[exevision]

Vad/hur åt de som inte fick vassle?

[Ivan Bogus]

Fanken, då kan man slänga sitt Whey FX i soporna nu då. :cryout:

[maaherra]

Vad var det för typ av styrketräning som utfördes? (Är väl = resistance training)

[Eddie Vedder]

Vad/hur åt de som inte fick vassle?

Alla åt på samma sätt. Man blir helt enkelt ombedd att äta som vanligt.

Nonsupplement intakes. Among all groups, nonsupplement
energy intake decreased from baseline to wk 18 (21.8 6 1.9 MJ/
d, P , 0.001) and pre- to postintervention (21.4 6 2.2 MJ/d, P
, 0.001); thus, the participants maintained body weight by
compensating for the 1.7-MJ/d supplements (Fig. 1A, Supplemental
Tables 5 and 6). The macronutrient distribution of
nonsupplement energy intakes did not largely differ from
baseline macronutrient distributions (Fig. 1A). The percentage
of energy contribution from protein increased (16 6 3% vs. 17 6
4%, P,0.01) and from carbohydrate decreased (4868%vs. 466
8%, P = 0.03) from pre- to postintervention. The percentage of
energy contribution from fat did not change (3566%vs. 3666%,
P = 0.47).

Total energy and protein intakes (including supplements).
Total energy intakes were not different between time points or
protein groups (Fig. 1B and Supplemental Tables 5 and 6). Total
protein intake (g/d and g × kg21 × d21) decreased from pre- to
postintervention in the 0-g/d group (P = 0.01) and increased (P,
0.001) from pre- to postintervention in the 20-, 40-, and 60-g/d
groups (Fig. 2 and Supplemental Table 5). Over time, the
percentage of energy from protein decreased in the 0-g/d group
and increased in the 20-, 40-, and 60-g/d groups (P , 0.05). The
relative contribution of total protein was lower in the 0-g/d
group compared with the 20-, 40-, and 60-g/d groups (Supplemental
Fig. 2).

Mer totalt protein i tillskottsgrupperna är ju inte oväntat direkt. :)

maaherra: Detaljer om träningen redogörs inte för tyvärr. De hänvisar till material online för detaljerna. Lite synd kan jag tycka.

[King Grub]

Whey protein supplementation may augment resistance exercise-induced increases in muscle strength and mass. Further studies are required to determine whether this effect extends to mobility-limited older adults. The objectives of the study were to compare the effects of whey protein concentrate (WPC) supplementation to an isocaloric control on changes in whole-body lean mass, mid-thigh muscle cross-sectional area, muscle strength, and stair-climbing performance in older mobility-limited adults in response to 6 months of resistance training (RT).

METHODS:

Eighty mobility-limited adults aged 70-85 years were randomized to receive WPC (40g/day) or an isocaloric control for 6 months. All participants also completed a progressive high-intensity RT intervention. Sample sizes were calculated based on the primary outcome of change in whole-body lean mass to give 80% power for a 0.05-level, two-sided test.

RESULTS:

Lean mass increased 1.3% and 0.6% in the WPC and control groups, respectively. Muscle cross-sectional area was increased 4.6% and 2.9% in the WPC and control groups, respectively, and muscle strength increased 16%-50% in WPC and control groups. Stair-climbing performance also improved in both groups. However, there were no statistically significant differences in the change in any of these variables between groups.

CONCLUSIONS:

These data suggest that WPC supplementation at this dose does not offer additional benefit to the effects of RT in mobility-limited older adults.

J Gerontol A Biol Sci Med Sci. 2012 Oct 31. Efficacy of Whey Protein Supplementation on Resistance Exercise-Induced Changes in Lean Mass, Muscle Strength, and Physical Function in Mobility-Limited Older Adults.

[Ola Wallengren]

Angående studien här ovan så är det inte så konstigt att de inte såg någon skillnad mellan grupperna, pga av att 6 månaders träning gav väldigt blygsamma resultat (eller ganska dåliga faktiskt). De ökad ca 0.6 kg fettfri massa i vassle gruppen och 0.3 kg i kontrollen, fastän studien var ganska stor och pågick länge så kan man inte se skillnader på så små resultat (när det gäller dessa typer av mått).
Skillnaden i proteinintag mellan grupperna var ca 18g per dag, inte så mycket men tittar man på alla jämförelser så finns det en tydlig trend till större ökningar i vasslegruppen och de ökade faktiskt signifikant mer i bensparken.

[Klein]

Äldre tenderar ju också att ha väldigt dålig aminosyrekänslighet så lite fiskolja i kombination med vassleprotein skulle vara intressant.