## 7 Conclusions  
This review paper aims to contribute through an analysis of research from 1980 to 2024 in the field of vibrations transmitted to hand-arm systems, without claiming to be all-inclusive. The reason for this is that the field is extremely vast, with previous studies being concerned with the transmission of vibrations and the occurrence of occupational diseases [1], and the most recent ones nominally dealing with more specific aspects (for example, the transmission of vibrations to the hand by the force of grip [36; 55] of the hand and the working tool [14; 17; 42; 47; 69], etc., comparisons with the standards [5; 6; 7; 8; 9; 10], or aspects of vibration measurement [58; 63; 70]). These conclusions can be divided into two parts, one regarding the standardization of vibration transmission to the hand-arm system and the other regarding the use of gloves. In the first instance, studies in the specialized literature in this field [1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 50; 51; 52; 53; 54; 55; 56; 57; 58], as well as others, have shown over time that mechanical vibrations are transmitted to the human body and, in particular, to the hand-arm system through the use of vibrating devices and machines, and their complete elimination is not a viable solution. Research is under continuous development in this field: for example, [PERSON]. [38], [PERSON] [4], [PERSON]. [16], and others have studied vibration absorption power [17; 82] and apparent mass or mechanical impedance. Also, studies by [PERSON] [1], [PERSON]. [35; 41], [PERSON], [37; 50], [PERSON]. [59], [PERSON]. [3; 4], [PERSON] [86], and others have shown the effects of vibration on people in the workplace. [PERSON]'s and [PERSON]'s books [2; 4] are a compendition on the transmissibility of vibrations to the human body (or hand-arm system) [41; 48; 51; 52; 55; 76; 77; 80; 81; 85; 87]. This is why the studies in this review present comparative results regarding vibrations measured on hand-arm systems and existing standards, such as 5349/2003. These studies show how to minimize the vibration transmitted to a person in the workplace. At present, the use of gloves is recommended. The types of materials from which these gloves are made are still under study [23; 25; 45] to obtain equipment that absorbs as little power as possible during the use of vibrating tools [14; 15; 17; 42; 83]. Hence, there is a need for thresholds regarding the duration of exposure to vibrations, such as compliance with standards limiting people exposure [5; 6; 7; 8; 9; 10], alongside the need to wear and use protective equipment against said vibrations [24; 25]. This is also the reason why researchers have contributed to vibration reduction by making improvements to existing protective equipment. For instance, vibration dissipation equipment [46] is being designed so as to dissipate vibrations, preventing them from reaching a large proportion of the elbow, shoulder, and head. In addition, three previously highlighted aspects should be taken into account, as well as conclusions regarding the risks which may arise as a result of prolonged exposure to vibrations at the workplace. Employers should respect the threshold values imposed by the standards regarding human exposure to vibrations in the workplace [5; 6; 7; 8] (outlined in SR EN 5349/2001 and the subsequent amendments introduced in 2003 regarding vibration exposure and the transmission of vibrations to the hand-arm system, as well as SR EN 2631/2001, regarding vibrations transmitted to the human body). Compliance with the vibration thresholds given by the above standards creates a comfortable state for those exposed to vibrations during work, without causing a deterioration of their health and instead leading to higher work productivity [3; 11; 23; 26; 31; 36; 40; 48; 55; 56; 86; 87].