0000000000135322
AUTHOR
F. Latteri
The effect of fatigue on store and re-use of elastic energy in slow and fast types of human skeletal muscle
Stretch-shortening exercises are characterized by enhancement of performance when compared to the work output performed in shortening conditions. There is evidence that fast subjects are unable to re-use great amounts of elastic energy during stretch-shortening cycles performed with slow stretching speed and large stretching length. In the present study, 14 subjects possessing different fibre types in m. vastus lateralis performed vertical jumps with and without preliminary countermovement and with large angular displacement and slow stretching speed The jumping tests were executed before and immediately after fatigue induced by short intense exercises (60 s of continuous rebound jumping). …
Is early recurrence of hepatocellular carcinoma in HCV cirrhotic patients affected by treatment with direct-acting antivirals? A prospective multicentre study
SummaryBackground Data on HCV-related hepatocellular carcinoma (HCC) early recurrence in patients whose HCC was previously cured, and subsequently treated by direct-acting antivirals (DAAs), are equivocal. Aim To assess the risk of HCC early recurrence after DAAs exposure in a large prospective cohort of HCV-cirrhotic patients with previous successfully treated HCC, also looking for risk factors for cancer early recurrence. Methods We enrolled 143 consecutive patients with complete response after curative treatment of HCC, subsequently treated with DAAs and monitored by the web-based RESIST-HCV database. Clinical, biological, and virological data were collected. The primary endpoint was the…
The effect of pre-stretch on mechanical efficiency of human skeletal muscle
The mechanical efficiency of positive work was studied in six subjects performing three different types of exercises. On the first occasion the subjects ran on a motor-driven treadmill at 3.33 m s-1; the second and the third exercises consisted of performing rhythmical vertical jumps for 1 min both in rebound (RJ) and no-rebound (NRJ) conditions. The mechanical efficiency calculated in NRJ, which reflects only the conversion of biochemical energy into mechanical work, was found to be lower than the corresponding observation in RJ, 17.2 vs. 27.8% (P less than 0.001), respectively. These differences could not be explained by only the storage and recoil of elastic energy occurring in RJ compar…
Indicazioni per uno Studio su Familiarità e fattori di rischio del Sarcoma di Kaposi classico
Obiettivi: Dalle analisi dei dati degli studi precedenti effettuati in Sicilia sono emerse diverse indicazioni, per cui è stata avviata un’indagine in Sicilia nel 2013 , grazie ad un finanziamento della LILT nazionale, intesa a: valutare la situazione immunologica ed ematochimica e la sieroprevalenza in persone a stretto contatto con i malati (parente di 1 grado o marito/moglie) o parenti affetti dalla stessa patologia; indagare alcuni fattori di rischio con un questionario;effettuare il follow-up dei malati ogni 6-12-18-24 mesi ; individuare un Centro di Riferimento in Sicilia per la diagnosi e cura di questo tumore raro. Materiali e Metodi: Sono stati arruolati 24 Casi (21M/3F) e 27 Contr…
The influence of extra load on the mechanical behavior of skeletal muscle
Eleven international jumpers and throwers engaged in year round training were divided into experimental (n = 6) and control (n = 5) groups. The experimental group was tested before and after a 3 weeks simulated hypergravity period, and again 4 weeks after the hypergravity period. The high gravity condition was created by wearing a vest weighing about 13% of the subjects body weight. The vest was worn from morning to evening including the training sessions, and only removed during sleep. The daily training of all subjects consisted of classical weight training and jumping drills. No changes in the ordinary training program were allowed in the experimental group, except for the use of the ves…