1,721,016 research outputs found
Circulating Cell-Free DNA in Physical Activities
No full textThe interest about circulating cell-free DNA (cfDNA) concentration increased from several years because of its correlation with various conditions like osteoarthritis, cancers, stroke, and sepsis; recently it has become an important marker for overtraining syndrome or performance diagnostics.
Several studies have demonstrated that cfDNA increases in vigorous and exhausting exercise but also endurance exercise. Acute effect of exercise on cfDNA concentration seems to be correlated to stress factor, while chronic effect is associated with necrosis and apoptosis.
The intensity and duration seem to have effects on the variation of cfDNA concentration that is strongly correlated with other metabolic markers like acid lactate and creatine kinase, recognized as markers of muscle damage. Variation of cfDNA value could be used to predict overtraining syndrome
ELECTROMYOGRAPHIC ANALYSIS OF LEG EXTENSION EXERCISE DURING DIFFERENT ANKLE AND KNEE POSITIONS
No full textThe imbalance between vastus medialis oblique (VMO) and vastus lateralis (VL) strength is
one of the main factor for patellofemoral pain syndrome (PFPS) onset, related to improper
alignment of the patella. The aim of this paper is to investigate the effects of knee flexion, knee
rotation and ankle flexion attitudes on the activity of the VMO and VL muscles during unilateral
maximal voluntary isometric contraction (MIVC) of the quadriceps femoris. Eighteen
healthy subjects volunteered for the study. Five conditions for two different knee flexion angles
(90; 30 ) were tested using leg extension machine: Neutral (N) condition, maximal knee
medial rotation (MR), maximal knee lateral rotation (LR), maximal ankle plantarflexion (PF)
and maximal ankle dorsiflexion (DF). Data were normalized in order to calculate the normalized
VMO/VL ratio. The normalized VMO/VL ratio for all the conditions occurred at 90
of knee flexion was higher than the same conditions at 30 of knee flexion ðp 1⁄4 0:02Þ. No
statistical differences between conditions at the same knee angle and for angle x condition
interaction were observed ðp > 0:05Þ. These findings suggest that knee flexion should be the
first variable to be managed during isometric knee extension movement performed by leg
extension machine, in order to increase VMO/VL ratio
A RAPID AND AUTOMATED METHOD TO DETERMINE APPROPRIATE EXERCISE PARAMETERS FOR TAILORED SUBSTRATE CONSUMPTION DURING AEROBIC EXERCISE
No full textThe growing prevalence of obesity and metabolic disorders such as type II diabetes, is associated with reduced exercise and maximal fat oxidation rate (Fatmax). The aim of this study was to verify the reliability of a new test protocol (Fatmaxwork
Þ using the INCA software package. Twenty four sedentary subjects was enrolled and performed the following tests using
a VO2000 metabolimeter: (1) An incremental test of 20 min to determine the individual Fatmax and maximum rate of fat oxidation (MFO) with new Fatmaxwork test; (2) a constant load test of 60 min. For our subjects, the average fat zone was estimated by INCA at 54:2 4:9% max HR, RER 0:86 0:09, 130 64 W. The results from the constant load test differed by 0:01 1:92 for respiratory gas exchange rate (RER) and 0:22 1:92% for heart rate (HR).
This study showed that the Fatmaxwork test can be used to predict Fatmax in untrained overweight subjects and INCA is a reliable and accurate software packag
EFFECTS RESISTANCE EXERCISE AND STRENGTH TRAINING ON ANTROPOMETRIC MEASURE AND IMPROVEMENT OF PHYSICAL EFFICIENCY IN ADULT WITH METABOLIC SYNDROME
Full text linkIt has been recognized by OMS that physical exercise has a therapeutic tool for the prevention and treatment of various diseases and that its reduction is one of the major risk factors for disease. The objective of this study was to analyses the effects resistance training combined strength training on index form and antropometric measure on subjects with metabolic syndrome
METHODS OF ASSESSMENT BIOMECHANICS IN CYCLING: FROM POSTURAL DISORDER TO THE DISEASE
No full textDuring leisure time, the bicycle is used a lot as an instrument to keep moving, because of it improves the
function of the cardiovascular and pulmonary, blood pressure control and especially because it
encourages the development of well-being. While in the sports world is used and studied in all its forms,
and from here comes the requirement of a study on the biomechanical evaluation of the cyclist, to
improve the quality of the performance and to prevent all the diseases related to incorrect posture on the middle, such as low back, low back pain, neck pain, knee’s tendonitis.Laboratory studies of cycling were launched when it was built the first cycle ergometer in the early 20th century and their development was accompanied by improvements in software for data acquisition and for the consequent data analysis. The evaluation of the athlete includes a complete analysis of the static morphology, joint mobility, and possible paramorphisms or dysmorphism.
The acquisition systems are many, a lot software houses have developed programs able to carry out this
function, differing for their functionality.
Idmatch ® is the first patented system in cycling and can be used for the analysis of step, the support and the foot pressure, and the support of the two ischial bones in a sitting position.
Stabylopro is mainly used to highlight the rider's foot support and analyze any imbalances of the foot.
Bikesys is a custom system able to perform the detection of cyclist’s pressure on the seat during pedaling.
The main software allows, in a completely non-invasive way, the acquisition in numerical form, the
processing and the integrated representation of kinematic and dynamic data related to posture and
movement of persons. Bikesys is also used in medical and rehabilitation field for postoperative evaluation
or analysis of the results of a training program in sports.
Kinovea is a software for the acquisition and evaluation of movement; it’s very valuable to analyze the technique of motion and improve the performance of the sportsman
METHODS OF ASSESSMENT BIOMECHANICS IN CYCLING: FROM POSTURAL DISORDER TO THE DISEASE
No full textDuring leisure time, the bicycle is used a lot as an instrument to keep moving, because of it improves the function of the cardiovascular and pulmonary, blood pressure control and especially because it encourages the development of well-being. While in the sports world is used and studied in all its forms, and from here comes the requirement of a study on the biomechanical evaluation of the cyclist, to improve the quality of the performance and to prevent all the diseases related to incorrect posture on the middle, such as low back, low back pain, neck pain, knee’s tendonitis.Laboratory studies of cycling were launched when it was built the first cycle ergometer in the early 20th century and their development was accompanied by improvements in software for data acquisition and for the consequent data analysis. The evaluation of the athlete includes a complete analysis of the static morphology, joint mobility, and possible paramorphisms or dysmorphism. The acquisition systems are many, a lot software houses have developed programs able to carry out this function, differing for their functionality. Idmatch ® is the first patented system in cycling and can be used for the analysis of step, the support and the foot pressure, and the support of the two ischial bones in a sitting position. Stabylopro is mainly used to highlight the rider's foot support and analyze any imbalances of the foot. Bikesys is a custom system able to perform the detection of cyclist’s pressure on the seat during pedaling. The main software allows, in a completely non-invasive way, the acquisition in numerical form, the processing and the integrated representation of kinematic and dynamic data related to posture and movement of persons. Bikesys is also used in medical and rehabilitation field for postoperative evaluation or analysis of the results of a training program in sports. Kinovea is a software for the acquisition and evaluation of movement; it’s very valuable to analyze the technique of motion and improve the performance of the sportsman
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