Frailty Clinical Trial
Official title:
Multicomponent Analysis of phYsical Frailty BiomarkErs: Focus on Mitochondrial Health - MAYBE
The study will be conducted in a group of obese sarcopenic patients (Sarco-Ob) aged > 60 years on moderately hypocaloric diet therapy aimed at comparing the effect of a strength exercise protocol, combined or not with dietary supplementation with amino acids, on physical performance, muscle strength, body composition, muscle oxidative metabolism, and biomarkers of sarcopenia. The supplementation study will be conducted in a double-blind manner.
In this double-blind randomised control trial, older men, and women resident in Verona (Italy) will be selected from the Geriatrics Nutritional Clinic of the Borgo Trento Hospital or were contacted by telephone. A specific medical screening was initially programmed to verify the criteria of recruitment. Anthropometric and body composition In the morning, in a fasted state, body mass will be taken with an electronic scale (Tanita electronic scale BWB-800 MA) and stature will be measured with a Harpenden stadiometer (Holtain Ltd., Crymych, Pembs. UK); BMI will be calculated as weight (kg)/height (m)2. Thereafter, total and regional body composition will be evaluated by means of dual-energy X-ray absorptiometry (DXA) using a total body scanner (QDR Horizon W, Hologic, MA, USA; fan-bean technology, software for Windows XP version 12.4.2) according to the manufacturer's procedures. Furthermore, the ALMI will be calculated as the sum of lean mass of arms and legs divided by height squared. Physical performance On the same day, the SPPB test will be used to assess functional performance of the lower extremities. Each participant will performed: 4 m at usual customary gait speed, a five repeated chair-stands test and three standing balance tests (side by side, semi-tandem and tandem). A digital dynamometer (CAMRY, Digital Hand Dynamometer model: EH101) will be used to assess HGS and all measurements were conducted by the same operator. Before starting, participants will observe a demonstration of the test procedure and engage in two practice attempts. Knee muscle strength measurements and analysis An isokinetic dynamometer (CMSi Cybex Humac Norm Dynamometer, Lumex, Ronkokoma, NY, USA) will be used to assess the isokinetic strength of knee flexors and extensors muscles. Maximal isokinetic knee extension-flexion tests will be performed in a randomised sequence at 60, 90, 150, 180 and 210°ˑs-1. Trials will consist in three knee extension-flexion movements with 60 s-recovery. The maximal strength of knee extensors muscle will be calculated with the Hill's hyperbolic function. The isokinetic knee extension-flexion power will be calculated as the product between strength and velocity. Finally, for knee extensors, maximal muscle power expressed in Watt, will be calculated from the power-velocity curve. 1-RM assessment Before starting training intervention, participants will perform three sessions of familiarization with the resistance isotonic machines. High intensity strength exercise (Exe-H) protocol: All the participants will performed a supervised progressive resistance training protocol, three times per week, 1 hour per session. Each participant will performed the same strength training protocol, starting with 3 sets of 8-10 repetitions at 70% of 1-RM (month 1), with a progressive increase of intensity at 75% of 1-RM (month 2 and month 3), and 80% 1-RM that will be maintained for the rest period of intervention. The compliance will be define as the number of exercise sessions expressed in % of the target value. Each participant will must reach a compliance above the 70% to be included in the final analysis. ;
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