1,721,023 research outputs found
Lesione omerale di difficile interpretazione su un reperto umano di epoca protostorica nel nord Italia.
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Considerazioni antropologiche e paleopatologiche sull'uomo pre-protostorico del Piemonte.
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Valutazione soggettiva del comfort del posto di guida di trattori agricoli. Risultati di un’indagine tra gli operatori
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Analisi antropologica dei resti ossei e dentari rinvenuti nella tomba monumentale del sito “Papillon".
No full textThree-axial evaluation of whole-body vibration in agricultural telehandlers: The effects of an active cab-suspension system
No full textAgricultural and earth-movingmachinery operators are particularly exposed to whole-body vibration (WBV), which has severe effects on health and affects comfort and performance. Few studies have investigated vibrational safety and comfort issues in telescopic handlers. These vehicles are widespread in many off-road applications—such as construction, agriculture, and mining—used to handle loads and to lift persons and equipment. This study investigated the effects of an active hydro-pneumatic cab-suspension system fitted to a telehandler on a driver’s vibration exposure along the x-, y-, and z-axes, through both objective and subjective assessments. Sixteen healthy professional telehandler drivers took part in the study. Objective measurements were acquired at the operator’s seat, and subjective ratingswere takenwhile participants drove the telehandler with either a deactivated or activated suspension system at 12 kph on an ISO 5008 smooth track. The results showed that the activation of the cab-suspension system reduced the root-mean-square acceleration along the x- and z-axes (p=.038 and p=.000, respectively). Moreover, the frequency analysis showed a reduction in the acceleration along the z-axis in the range of 2-25 Hz (p<.05 for all comparisons); in particular, the acceleration was reduced by 50% in the higher frequency range (4-20 Hz). A reduction in the vibration intensity was perceived by the participants along the y- and z-axes (p = .009 and p = .003, respectively). Implications for the future development of suspension systems are discussed
Body composition symmetry in long-term active middle-aged and older individuals
Full text linkThis study aimed to analyze body composition and strength symmetry in a sample of 165 middle-aged and elderly Italian volunteers, which included 97 active (67 men and 30 women; 61.17 ± 7.56 years) individuals regularly engaged in Tai Chi Chuan, tennis, or running, and a control group of 59 age-matched sedentary (27 men and 32 women) individuals. Anthropometric and bioelectrical measurements and hand grip strength of both sides were collected. Segmental body composition was analyzed through specific bioelectrical impedance vector analysis. The body composition of the right and left limbs was similar among active individuals (arms: T2 = 6.3, n.s.; legs: T2 = 5.0, n.s.), with a similar pattern in the three different disciplines. By contrast, the control group showed bilateral asymmetry (arms: T2 = 6.8, p < 0.001; legs: T2 = 8.8, p < 0.001), mainly because of the higher values of specific reactance (t = 2.4; p = 0.018) and phase angle (t = 2.0; p = 0.054) in the dominant arm, and the higher specific vector length (t = −3.0; p = 0.027) in the left leg. All of the groups showed a higher hand grip strength in the dominant arm (active: t = 7.0, p < 0.001; control: t = 2.9; p < 0.01). In conclusion, the active individuals showed stronger body composition symmetry than the controls, thus indicating a previously undetected positive effect of sport in middle-aged and older adults
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