The Effect of Double Leg Bound Exercise Technique to the Muscle’s

Explosive Power of the Male Students of SMK Negeri 1 Tondano

Fentje W. Langitan and Beatrix J Podung

Manado State University, Tondano, Indonesia

Keywords: Plaiometric, Double Leg Bound, Explosive Power

Abstract: Explosive power is one of the elements of physical fitness needed by most sports, especially those that

require strength and speed. Double leg bound is part of plaiometric training that is useful for increasing

explosive power. To find out how far the training can improve leg muscle explosive power, a randomized

pre-test control group design test design was conducted involving 20 male students in grade 1 of SMK

Negeri 1 Tondano aged between 15-18 years. The treatment group was given a double leg bound. The

exercise was held for 6 weeks. The results of the measurements showed that the average explosive limb

muscle power before exercise was 3.516 cm and after exercise 4,107 cm. Differences before practice and

after practice level of significance (p ˃0.5). This study concluded that double leg bound increased the leg

muscle explosive power of the male students of SMK Negeri 1 Tondano.

1 INTRODUCTION

Physical fitness is one of the factors that influence

sports performance. Physical fitness is the

development of every part of the body, namely the

ability of the muscles to move or contract, the

circulatory system, the respiratory system, nervous

system and others, in order to work optimally to

meet the body's needs for activities due to

environmental demands. Having a higher physical

fitness during one's life can improve his appearance.

For athletes or sportsmen, physical fitness

determines the success of achieving optimal

performance.This is too, say that if one had low

physical fitness even high appearance of skills, the

skills have no meaning at all, he will be weak and

lose (Nala, 1998).

Each component or elements of physical

freshness cannot be equated with its function, work

and burden. Each sport has a dominant percentage of

physical fitness. Based on these differences, it is

necessary to find the dominant physical freshness

component or the most widely displayed in the

sports that are occupied. The higher the level of

physical fitness that is owned will be more

supportive of the achievement of specific

techniques, and the faster the skills can be mastered

(Sajoto, 1988).

Leg muscle explosive power is one of the

components or important elements in many sports

that require strength and speed (Nala, 1998). Muscle

explosive power is the ability of muscle contraction

in the shortest possible time (Sajoto, 1998).

Explosive power is a component or element of

motion that is very important for carrying out very

heavy activities and can determine how hard a

person can hit, how far it can throw, how high it can

jump, how fast it can run and swim. Therefore

athletes or sportsmen who have high leg muscle

explosive power will be able to jump higher. This

explosive power measurement can be carried out in

athletic power measurement. Based on this

measurement, professional trainers who want to find

candidates for athletes, and athletes can analyze and

make good training programs according to what

sports are trained, without neglecting other

supporting aspects, such as knowledge about

physiology, biomechanics, anatomy, nutrition and

others.

Special physical fitness training for leg muscles

explosive power has not received significant

attention from trainers in the field. Observations in

the field most of the trainers in exercising physical

fitness (explosive power) of the leg muscles directly

entered into the exercise technique pursued. Athletes

immediately conduct certain sports without

preparing the physical fitness elements adequately.

500

Langitan, F. and Langitan, F.

The Effect of Double Leg Bound Exercise Technique to the Muscle’s Explosive Power of the Male Students of SMK Negeri 1 Tondano.

DOI: 10.5220/0009014105000503

In Proceedings of the 7th Engineering International Conference on Education, Concept and Application on Green Technology (EIC 2018), pages 500-503

ISBN: 978-989-758-411-4

So that the results are not optimal and sports injuries

occur which of course are very detrimental to the

athlete itself, so that all efforts become futile. In

addition, the trainer does not pay attention to the

dosage which is a parameter to determine the

quantity and quality.

Therefore, this research is formulated around is

how much influence the jump training technique

soars upwards with the same dose increasing the leg

muscles' explosive power of SMK Negeri 1

Tondano in 2018.

Radcliffe and Farentinos (1985) distinguished

three groups of plaiometric exercises, namely: a)

exercise for lower limbs, b) exercise for the torso, c)

exercise for upper limbs. Exercises for downward

motion consist of bounds, hops, jumps, leaps, skips,

ricochets. So in principle, plaiometric training is an

exercise that has a special characteristic, which is to

build strong muscle contraction as a response to

dynamic loading or rapid strain of the muscles

involved. This training is commonly known as

stretch reflex.

According to Harre (1982), training for the hips

and legs consists of bounding exercises and depth.

Meanwhile, according to Chu (1992), the training

consists of jumping-in-a place, bounding box drills

and depth jumps. So the goal of plaiometric training

is to allow the muscles to achieve maximum strength

in the shortest possible time. Stretch shortening

cycle is another term for plaiometrics. The definition

stated in principle is the same.

Plaiometric is a training method that is intended

to increase explosive power or explosive power.

Nala (1998) as quoting Radcliffe and Farentinos

(1985), plaiometry has leg and hip muscles, by:

a. Jump with both footprints on the floor, soaring

maximum upwards to achieve a horizontal jump

(tread with two feet) as far as (bounds);

b. Maximum vertical jump (two footprints) by first

bending the knee, which is important is the

extent of the knee joint movement;

c. Jump (two feet) wherever possible regardless of

how far horizontally jumps forward;

d. Jump as vertical and horizontal as possible, with

two jumps or one leg;

e. Jump or step alternately, with both jump height

(one foot) and horizontal jump distance;

f. Jumping up and down (two footprints) quickly,

where height and distance jump to a minimum.

Upward jumping training techniques are

included in plaiometric training that emphasizes leg

muscles (Nala, 1998). Upward jumping is a

specialization of training, due to an adaptation that

changes the shape and function of the body system,

especially those that are closely related to the sport

involved (Nala, 1998). Likewise the vertical form of

plaiometric training jumps with repulsion of both

feet, the position of the knees folded and lift high

and the palms touching the knees (Radcliffe and

Farentinos, 1985). Where the movement jumps from

both feet simultaneously.

Pliometric training will stretch the muscles. The

aim of administering stretch before contracting

physiologically is to give the optimum initial length

to the muscle, obtaining elastic power, causing a

stretch reflex. Plyometric training must be applied

specifically which is to train muscle groups or

neuromuscular specificities. It is specific to the main

energy system and to the pattern of exercise

movements.

Anatomically, the main muscles involved in

jumping upward and jumping exercises are not

different in the lower limbs (upper leg muscles and

lower limb muscles).

a. Upper limb muscles: gluteus maximus, biceps

femoris, semi tendinosus, semimembranosus,

gluteus medius, gluteus minimus, adductur

magnus);

b. Lower leg muscles: gastrocnemius, soleus,

perineus longus, peroneus brevis, calcaneus,

plantaris (Jensen and Fisher, 1979).

Judging from the principles of training, the type

of jump training soars upwards more in accordance

with its movements with the measuring instrument

to be used (upright jump). In addition, the movement

from jump training soars up higher than the runway

surface. With a high jump distance, the speed of free

fall from the jump training is higher.

The more frequent jumping up training is done

the stronger is patterned in the nervous system. With

this training, physiologically there will be a process

of conditional reflex formation, process of learning

to move and process of adaptation.

The aim for this study is to prove whether

jumping training techniques soar upwards with the

same dose can increase the leg muscles' explosive

power of SMK Negeri 1 Tondano in 2018.

2 RESEARCH METHODS

This experimental research method uses the

Randomized Pre-test Post-test design (Zainuddin,

1988) with the male student population of SMK

Negeri 1 Tondano in 2018. Those taken as samples

are 20 people aged 15-18 years, simple random and

divided into two groups equally based on the initial

test results.

The Effect of Double Leg Bound Exercise Technique to the Muscle’s Explosive Power of the Male Students of SMK Negeri 1 Tondano

501

The research variables are as follows:

1) The independent variable (independent variable)

that will be studied is jump training soar up.

2) Dependent variable (dependent variable) is the

explosive power of the leg muscles.

Upward jumping training is a training in which

the someone tries to jump as high as possible in the

future with repulsion of both feet, the position of the

knees folded high and the palms touching the knees

and landing with both feet pressed and not ignoring

the principles of training. In the preliminary study,

the maximum ability to jump students was 32 times.

To measure the jump a rope was used with a height

of 44 cm. Upward jumping training was carried out

with explosive motion, 6 weeks training time with a

frequency of 3 times per week, an intensity of 80%

of maximum ability, repetition 26, rest between sets

was 2 minutes, weight was the body weight itself.

Leg muscle explosive power is the ability of the

leg muscles to contract with maximum strength and

is quick to jump upright on two legs. The strength of

the explosive muscles of the leg muscles is

proportional to the height of the jump ability. The

units are centimeters (cm) which is the difference in

the upright jump minus the upright gain. The tool

used is a cm scale board with an accuracy of 0.1 cm.

This exercise was based on the athletic power

measurement (Nurhasan, 1989).

3 RESULTS AND DISCUSSION

The results showed that there was a very good

change of increase in the average value for students

who were made into the experimental group or

treatment, the average score of 3.516 in the initial

test increased to 4,107 in the final test.

The results of the statistical tests showed a very

significant increase, namely the change in the

average value of the final test in the experimental

group, which was very good.

This study concluded that the increase in leg

muscle explosive power due to jumping upward

training in students of SMK Negeri 1 Tondano had a

better positive effect.

Characteristics of the study subjects before

exercise included age, height, weight, leg muscle

explosive power and physical fitness before being

given training, the data were tested for normality and

homogeneity, as in the Table 1.

Table 1: Normality and homogeneity of variance

characteristics of research subjects.

Variable P value One-sample

Kolmogorof-Smirnov test

P value

Leven test

equality of

variance

*Group 1 **Group 2

Age (years) 0.70 0.70 0.855

Height (cm) 0.617 0.816 0.805

Kg body

weight)

0.553 0.948 0.664

Leg muscle

explosive

power (Cm)

0.964 0.622 0.408

Physical

Freshness

(s)

0,987 0.967 0.979

*Group 1 = Leg Bound Exercise

**Group 2 = No treatment (control)

From the table above, the p value of the normality

test (Kolmogorof-Smirnof) from the characteristics

of age, height, weight, leg muscle explosive power,

physical fitness obtained p ˃ 0.5, so that it can be

concluded that the characteristic data in group 1 and

group 2 normal distribution. Likewise, p value

equality of variance from age, height, weight, leg

muscle explosive power and physical fitness

between groups was obtained p ˃ 0.5. It can be

concluded that there is an increase in variance

characteristic of age, height, weight, leg muscle

explosive power and physical fitness between

groups is homogeneous.

To determine the comparability of the

characteristics of the research subjects between

groups before being given the treatment results as in

the following Table 2.

Table 2: Comparison of characteristics of research

subjects by treatment group.

Variable

*Group

**Group

Anova

F p

Age

(year)

Mean 13.58 13.58 0.104 0.902

SD 0.51 0.51

Height

(CM)

Mean 151.42 150.58 0.109 0.897

SD 4.50 4.10

Weight

(Kg)

Mean 47.74 47.17 0.059 0.943

SD 5.18 4.69

Leg

muscle

explosive

power

(CM)

Mean 77.67 76.50 0.596 0.557

SD 4.107 3.516

Physical

Freshness

(S)

Mean 13.555

13.476

0.01

0.98

SD 1.0672 1.0568

*Group 1 = Leg Bound Exercise

**Group 2 = No treatment (control)

EIC 2018 - The 7th Engineering International Conference (EIC), Engineering International Conference on Education, Concept and

Application on Green Technology

502

The results showed that the characteristics of the

subject before exercise included age, height, weight,

leg muscle explosive power and physical fitness in

group 1 and group 2 could show an increase as

presented in table 2. This was evidenced from the

normality and homogeneity tests obtained p ˃ 0.5.

This means that all characteristic data are normally

distributed and there is an increase in variance

between groups 1 and group 2.

With the data above, shows that the initial

condition of the subject of each group before

treatment is in a balanced state. And when there is

an increase, it is due to the treatment given to each

group. Physical training that is given regularly and

measured in sufficient doses and time can result in

greater energy abilities and influence in improving

physical appearance (physiological changes). This is

evidenced from the normality and homogeneity

tests, so that p ˃ 0.5. The results showed that the

characteristics of the subjects before exercise

included age, height, weight, leg muscle explosive

power and physical fitness in group 1 showed an

increase as presented in table 2.

Differences before practice and after practice

level of significance (p ˃0.5).

This study concluded that double leg bound

increased the leg muscle explosive power of the

male students of SMK Negeri 1 Tondano.

4 CONCLUSION

Explosive power is one of the elements of physical

fitness needed by most sports, especially those that

require strength and speed. Double leg bound

exercise technique can be used as a training guide to

foster physical fitness, especially to increase the

explosive power of leg muscles. Double leg bound is

part of plaiometric training that is useful for

increasing explosive power. Plaiometric is a training

method that is intended to increase explosive power

or explosive power.

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