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last set (p=0.009) and between the temperatures of
the thigh before and after exercise (p=0.006), as
showed in Table 1 as means and standard deviations.
The correlation between the mean percentage
change of maximum repetitions performed during
the first and last set and the percentage change in the
temperature of the thigh before and after exercise
was positive (r=0.12) but was not significant
(p=0.631).
Table 1: Maximum repetitions, thigh temperatures and
their variations.
First serie Last serie Variation
Maximum
repetitions
9.75±0.41 6.37±1.26
*
-4.39±2.5%
Before After Variation
Thigh
temperatures
35.5±1.2ºC 34.4±1.5ºC
*
-3.2±1.63%
*
Significant difference compared to previous values.
4 DISCUSSION
From the presented results it was evident that the
reduced performance in the proposed exercise was
not accompanied by an increase in the temperature
of the thigh, which refutes the hypothesis of this
study. Possibly the reducing in the temperature of
the thigh occurred due to its exposure to the
environment, and was not correlated with fatigue
generated in the resistance training session.
These results are contrary to findings by
Bandeira et al. (Bandeira et al., 2012) that indicated
a significant correlation between the temperature
and the thigh muscle fatigue. However, the authors
monitored the temperature 24 hours after the
completion of the training session, associating the
temperature increase to microlesions and inflame-
mation in the muscle group trained. Thus, these
results do not allow discussing the monitoring of
fatigue during the training session. The results of the
present study are also contrary to the assertions of
Bartuzi, Roman-Liu and Wiśniewski (2012), which
indicate a positive and significant correlation
between fatigue and muscle temperature. But it is
important to highlight that in this study was
measured the temperature of the arm, in the brachial
biceps, which generally has lower muscle mass and
area of heat dissipation, plus smaller skinfold
thickness and skin.
The results of the present study suggest that the
measurement of the temperature of the thigh is not
an effective way to control the fatigue generated in a
session of resistance training. Therefore, it does not
permit to knowing the fatigue levels and, if
necessary, to promoting the adjustments as
suggested by Szmuchrowski and Couto (2013), in
the training session load. However, the results may
be different in other muscles, body parts and other
exercises settings in a resistance training session,
which makes it necessary further studies about the
topic.
From the results of this study it can be concluded
that a reducing in the performance from a resistance
training session for thigh muscle, is not
accompanied by an increase in temperature of the
thigh. Therefore, the measurement of the
temperature of the thigh using IRC may not be an
effective way of load control during a session of
resistance training.
ACKNOWLEDGEMENTS
The authors of this study wish to thank the Fundação
de Amparo a Pesquisa (Research Protection
Foundation) of the state of Minas Gerais
(FAPEMIG-Brazil) and Pró-Reitoria de Pesquisa
(PRPQ) (Research Pro-Rectory) of the Minas Gerais
Federal University.
REFERENCES
Szmuchrowski, L.A. and Couto, B.P., 2013, Sistema
Integrado do Treinamento Esportivo. In: Dietmar
Samulski. (Org.). Treinamento Esportivo. São Paulo.
Bartuzi, P., Roman-Liu, D., Wiśniewski, T., 2012, The
influence of fatigue on muscle temperature. Int J
Occup Saf Ergo, vol. 18, no. 2, pp. 233–243.
Bandeira, F., Moura, M.A.M, Souza, M.A., Nohama, P.,
Neves, E.B, 2012. Can thermography aid in the
diagnosis of muscle injuries in soccer athletes? Rev
Bras Med Esporte, vol. 18, no. 4, pp. 246-251.
Shaw, S.B.; Shaw, I.; Brow, A.G., 2009. Comparison of
resistance and concurrent resistance and endurance
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