Blackjacks and Saps
Boston Leather Sap / blackjack is for law enforcement use only. It is a small, easily-concealed club consisting of a leather-wrapped lead weight attached to the end of a leather-wrapped coil spring or rigid shaft, with a lanyard or strap on the end opposite the weight. Materials such as lead, steel and leather are used to construct these weapons, but the base design is of a soft covering over a dense weighted core. A sap has a flat profile as opposed to the cylindrical shape of the blackjack
The weapon works by storing kinetic energy in the dense core during the swing, then spreads the impact over a larger surface area via the covering so as to avoid lacerating the skin and lessening the chance of breaking bones. In this way, the blow is intended to be felt as a "jarring" impact that is painful and/or numbing. When directed at the head, it works by concussing the brain without cutting the scalp. This is meant to stun or knock out the subject.
Blackjacks and Saps are used by law enforcement due to their low profile and small size, and their potential to knock a suspect unconscious. However, blows to the head are also easily fatal or can cause permanent damage, and they have since become less common equipment.
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What is a resistance training program?
Resistance training is where you exercise a specific muscle or group of muscles (e.g. legs or shoulders) by resisting gravity.
So using a set of dumbbells, starting from a standing position, arms by your sides, you would raise them above your head to exercise your shoulders.
The program element comes from creating a schedule of exercising different muscles/muscle groups on different days, and in different ways.
There are many, many different ways in which to do this, so spend some time researching them to find the effect you wish to achieve. Don't do it all on the internet - go to t…