2.1 Treatment
The treatment in this study was a circuit training
using 10 posts (movements) including, shuttle run,
push-up, sit-up, zig-zag run, leg raises, side shuffle,
squat thrust, lateral jump, mountain climber, and
dash. Each exercise took 30 seconds, the break
between exercises was 10 seconds, and the break
between sets of exercises was 4 minutes.
2.2 Instrument
The data were collected through a running-based
anaerobic sprint test (RAST), resulting in data on
fatigue index. The lower the fatigue index is, the
better the anaerobic lactacid capacity is (McKenzie,
2011).
2.3 Sample
The samples were 20 futsal extracurricular
participants at SMA Negeri 1 Haurgeulis, consisting
of 13 males and 7 females, selected using the total
sampling technique.
3 RESULTS AND DISCUSSION
The fatigue index is the interpretation of anaerobic
lactacid capacity. The difference between pretest and
posttest gain scores was 1.4 watt/sec.
The paired sample t-test resulted in the Sig. (2-
tailed) value of .003. Using the significance level of
0.05, it was concluded that H
0
was rejected. In other
words, the circuit training significantly influenced
the anaerobic lactacid capacity.
Table 1: Result of paired sample t-test.
4 CONCLUSIONS
Based on statistical testing, it can be concluded that
a 16-meeting circuit training can improve anaerobic
lactacid capacity. Using circuit training, the research
participants were able to improve several
components of physical condition simultaneously.
This is due to the fact that the circuit training
comprises different exercise elements done
simultaneously. In addition, the training movements
can be modified according to the needs.
Although the fatigue index was in a good
category (<10), it was revealed that there was an
increase in the fatigue index. This is not an ideal
condition because the higher the fatigue index is, the
easier it is to get tired. The increase in fatigue index
was due to fact that the researchers ignored the
requirements of anaerobic exercise, which is a good
aerobic capacity (Giriwijoyo and Sidik, 2012) that is
required to neutralize the lactic acid that allows a
better recovery during the breaks between posts or
between sets of exercises (Harsono, 2016). No sport
is 100% aerobic or 100% anaerobic. A good
anaerobic capacity is made possible by a good
aerobic capacity. Aerobic endurance significantly
supports speed endurance (Aliza, 2014). In anaerobic
endurance, aerobic capacity serves as the lactic acid
neutralizer during the break (Bompa and Careera,
2015). It was also revealed that the average
improvement of anaerobic lactacid capacity was
relatively small. This was due to the samples’ gender
differences. The samples were 13 males and seven
females. Bompa and Haff (2009) state that:
Gender differences can play an important role in
performance and individualized training adaptations.
Prepubescent boys and girls are very similar in
height, weight, girth, bone width, and skinfold
thickness. After the onset of puberty, boys and girls
begin to develop substantial differences in physical
attributes. After puberty girls tend to have higher
levels of body fat, lower amounts of fat-free mass,
and lighter total body masses. The research
participants were not really familiar with futsal
training exercises. This affected the movement
quality and understanding about the training
movements per se.
Some external validity factors the researchers
had no control over included: the small sample size,
the samples’ biorhythmic condition that might have
allowed unexpected condition such as illness,
samples’ fatigue as a result of other activities or
sleeping trouble that influenced their performance
during treatment or posttest. It was concluded that
circuit training was not effective in improving
anaerobic lactacid capacity.
REFERENCES
Aliza. 2014. Peningkatan Kemampuan Aerobik Cabang
Olahraga Futsal dan Dukunganya Terhadap Daya
Tahan Kecepatan. (Skripsi) Pendidikan Kepelatihan
Olahraga. Fakultas Pendidikan Olahraga dan
Kesehatan. Universitas Pendidikan Indonesia. Bandung
Sig. (2-Tailed)
Fatigue Index (Pretest) – Fatigue
Index (Posttest)
.003