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suspension ropes to design different movement to boost
muscle strength. Normally, they can be used at home;
besides, because they are economical and space-saving,
people like them very much. Many reports indicate the
muscle resistance training of suspension ropes also evoke
more core muscle to give strength and furthermore it
also enhance core muscle strength. Among mechanical
weight training equipment, there is one kind of hydraulic
resistance equipment which is user-friendly and steady
strength training. Therefore, it is safer to get away from
sports injuries. It can be a proper fitness equipment for
the elderly people or the sports-injured people.
Flexibility, muscle strength, cardiovascular endurance
are equally important to physical fitness of the healthy
people. They mean the largest range of motion given
by all limbs or body parts such as bending, stretching,
turning around and other motions. For instance, hurdle
racing athletes use their lower limbs to cross over hurdles.
They require hamstring extension flexibility and the range
of motion of the hip. Once they cannot reach enough
flexibility, they will kick off the hurdles. Some other sport
categories require athletes to have extremely flexibility
such as gymnastic or swimming. The elements to affect
flexibility contain the range of motion and muscle and
tendon extensibility. Having good and proper flexibility
decreases the lower back problems and of neck and
shoulder pains, muscles strain while doing sports. It also
helps maintain good posture. In order to keep appropriate
flexibility, we can do stretching exercises. Stretching is
generally divided into static stretch, dynamic stretches,
ballistic stretch, PNF (proprioceptive neuromuscular
facilitation) stretch, or group sports like yoga. All the
stretches can improve flexibility. Stretch sport shall be
carried out at least two to three times a week. All body
parts or limbs shall be extended at least ten to thirty
second every time and repeat two to three times.
Nowadays there are not many equipment which can
improve flexibility. Most of the fitness equipment
are auxiliary appliance such yoga brick, stretch band
or strap. The larger equipment are stretch station at
true stretch clubs, Proflex stretchTM, Precor stretch
trainer, Range3D and other self-stretching tools or
equipment. Products like Proflex stretchTM, Range3D
mainly focus on the lower body parts; there are limited
applications to stretch the upper parts and upper
limbs of the body. Additionally, from the muscle-
relaxing method to increase the flexibility, it is indeed
another way to better flexibility like vibration training
equipment. Changing the vibration frequency of the
vibration machine enable the body muscles to be
strained and relaxed at the same time. The vibration
machine can perform these two functions to the most
extent. Another viper vibrating foam roller is a must
equipment for all NBA players. It is a tool to relax and
increase muscle flexibility. Its advantages are short,
small, easy to carry and a fair price. However, there is a
vibrating motor inside the roller so that it makes larger
vibrating noise while put it on the floor. That is the
unavoidable shortcomings of using these vibrating
equipment.