Mariza Gonçalves

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The maximal lactate steady state (MLSS) is the highest blood lactate concentration that can be identified as maintaining a steady state during a prolonged submaximal constant workload. The objective of the present study was to analyze the influence of the aerobic capacity on the validity of anaerobic threshold (AT) to estimate the exercise intensity at MLSS(More)
The purpose of this study was to identify the Electromyographic Fatigue Threshold (EMGFT) of the biceps brachii muscle bilaterally during the elbow flexion in tests performed in different times. 30 second test, 1 minute test and fatiguing test, in concentric (CC) and eccentric (EC) phases. Nine healthy young men performed the elbow flexion with loads(More)
The rectus femoris was analysed in 10 volunteers during knee flexion and extension with the feet in normal, plantar flexion and dorsal flexion positions. Hewlett-Packard surface electrodes, an electromyographic signal amplifier, a computer equipped with an A/D conversion plaque (Model CAD 10/26), software specially designed to record and analyse the(More)
Stem cells and nanomaterials are two new and exciting fields of science that are evolving very fast and that are starting to establish ties. Nanomaterials should, however, be designed to interact with stem cells without compromising their biological characteristics, in other words, without affecting their viability and differentiation potential. In the(More)
PURPOSE To identify the electromyographic fatigue threshold in the erector spinae muscle. METHODS Eight 19 to 24-year-old male volunteers participated in this study, in which surface electrodes were used, as well as a biological signals acquisition module (Lynx) with a sampling frequency of 1000 Hz, a 1000 times gain, a 20 Hz high pass filter and a 500 Hz(More)
The gastrocnemius was analysed in 10 male volunteers during knee flexion and extension with the foot in normal, plantar flexion and dorsal flexion positions. Hewlett-Packard surface electrodes, an electromyographic signal amplifier, a computer equipped with an A/D conversion plaque (Model CAD 10/26), a software specially designed to record and analyse the(More)
The objective of this study was to analyze the electromyographic (EMG) signal behavior of rectus femoris (RF), vastus medialis (VM), vastus lateralis (VL) and biceps femoris (caput longum) (BFCL) from nine women during fatiguing dynamic and isometric knee extensions tests and to determine their EMGFT (Electromyographic Fatigue Threshold). Surface(More)
The aim of the present study was to assess the spectral behavior of the erector spinae muscle during isometric contractions performed before and after a dynamic manual load-lifting test carried out by the trunk in order to determine the capacity of muscle to perform this task. Nine healthy female students participated in the experiment. Their average age,(More)
Due to a shortage of textbooks with specific data on muscular activity concerning physical conditioning and sports, we analysed electromyographically the muscles pectoralis major and deltoideus anterior, bilaterally, in inclined "flying" exercises, during the concentric and eccentric phases, with external loads of 25, 50, 75 and 100% of the maximum load.(More)
This study aimed to compare the torque, torque ratio (Hamstrings: Quadriceps - H:Q), electromyographic (EMG) activity and EMG ratio (knee flexors: knee extensors EMG) in soccer players (SG, N = 10) and active subjects (AG, N = 10). Subjects performed three maximal voluntary isometric knee extensions and flexions at 45 degrees and 90 degrees to determine the(More)