are considered as a type of free weight and it is mostly used
in weight training. The word Dumbbell is originated in Tudor
England. It is in pairs of two and it is held in one hand. In
the past days, ancestor of the dumbbell was used in India with
the club shaped, so it is called as Indian club. Dumbbells are
mostly used by bodybuilders, sport players, wrestlers and others
wishing to increase strength and muscle size.
16th century, the device which is used for ringing church bells
was widely known for their impact on increasing muscle size.
At that time, rich young men installing similar device in their
home, which consist of a pulley with a biased rope. The user
pulled as like ringing a church bell but at the end of the pulling
ropes there are no actual bells and they were silent so it is
named as Bumbells. The pulley and biased rope fell out of fashion,
leaving just the weight.
In the early days, it was appeared as two equal
weights attached handle. Now days it is off two types.
like small barbells and it consist of 14 inch long steel bars
having one inch in diameter. To get a good grip, center part
is carved with a crosshatch pattern. To obtain a desired weight,
1 to 40 kg plates are slid onto the outer portion of the dumbbell.
These weights are secured with clips. Outer portion of a spinlock
dumbbell is threaded, and the collars are large nuts that screw
on and secure the plates through friction.
Fixed weight dumbbells
is created in a dumbbell shape. It is in two versions. Cast
iron coated with rubber for safety is expensive version. A cheaper
version consists of a rigid plastic shell that is filled with
can be used in all types of resistance weight training but the
popular dumbbell exercises remain the Bench press and the Biceps
curl. Without wearing cloves causes calluses on the palm of
the hand while using adjustable dumbbell. They are not harmful
to weight training, but most users dislike them and hence the
use of weight training gloves.