Proper driving requires a proper posture to bring comfort to drivers. A problem that commonly exists in driving is incorrect driving posture which can cause discomfort to the driver, especially when interacting with automotive pedals. Research on contraction of tibialis anterior (TA) muscle on driver's posture based on the knee angle less than 101º in a position of pressing and releasing a pedal was conducted to investigate and overcome this problem. This is a field experiment study and surface electromyography (sEMG) is used in collecting data on the TA muscle. The procedure of collecting data on the TA muscle before and after experiments follows the Surface ElectroMyoGraphy for the Non-Invasive Assessment of Muscles (SENIAM) recommendations. The result of the experiment shows that there is a strong negative relationship between driver's postures in nature based on the angle of the knee with TA muscle contractions, where the Pearson correlation coefficient (r) is - .993. While the temporal analysis measurements based on Maximum Voluntary Isometric Contraction (MVIC) 60% in a position of releasing a pedal exceeding rms μV 39.38, are 39.71 and 40.25 respectively. On the other hand, MVIC 2% rms μV values: 1.19 and 1.2 are obtained in the position of pressing the pedal. The knee angle with TA muscle contractions is significant [F (1, 10) = 660, p
Safe driving requires an ideal posture to bring comfort to drivers. A problem that commonly exists in driving is nonideal
driving posture, which can cause discomfort to the driver, especially when interacting with automotive pedals.
Research on contraction of Soleus muscle on driver's posture based on the knee angle more than 144º in a position of
pressing and releasing a pedal was conducted to investigate and overcome this problem. This is a field experimental
study and surface electromyography (sEMG) is used in collecting data on the Soleus muscle. The procedure of
collecting data on the Soleus muscle before and after experiments follows the Surface Electromyography for the
Non-Invasive Assessment of Muscles (SENIAM) recommendations. The result from the experiment shows that there is
a strong positive relationship between driver's postures in nature based upon the angle at the knee with Soleus
muscle contraction, where the Pearson correlation coefficient (r) is .990. While the temporal analysis measurements
based on Maximum Voluntary Isometric Contraction (MVIC) 60% in a position of pressing a pedal exceeding rms µV
25.34, and 25.47 respectively. On the other hand, MVIC 3% rms µV values: 1.18, 1.21 and 1.26 are obtained from the
position of releasing the pedal. The knee angle with Soleus muscle contractions is significant [F (1, 10) = 38.06,
p
Proper driving requires a proper posture to bring comfort to drivers. A problem that commonly exists in driving is
incorrect driving posture which can cause discomfort to the driver, especially when interacting with automotive
pedals. Research on fatigue of Soleus muscle on driver's posture based on the knee angle more than 144º in a
position of pressing and releasing a pedal was conducted to investigate and overcome this problem. This is a field
experiment study and surface electromyography (sEMG) is used in collecting data on the Soleus muscle. The
procedure of collecting data on the Soleus muscle before and after experiments follows the Surface
Electromyography for the Non-Invasive Assessment of Muscles (SENIAM) recommendation. The result of the
experiments shows that there is a strong positive relationship between driver's postures in nature based on the angle
of the knee with Soleus muscle contraction, where the Pearson correlation coefficient (r) is .890. While the muscle
fatigue index based on value MDF (MNF) in position of pressing a pedal. The results show that the Soleus muscle
fatigue occurs when the foot pressing a pedal on MVC-normalized 60%. This is because the value of MDF (MNF) there
is displacement of decrease of frequency MDF (MNF), from 130.21 Hz (313.42 Hz) to 127.60 Hz (312.49 Hz). The
increase in the knee angle will directly provide discomfort to the driver while interacting with the pedal; and this is
due to Soleus muscle fatigue.