Edyta Michalak

University School of Physical Education, Posen, Greater Poland Voivodeship, Poland

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Publications (5)1.85 Total impact

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    ABSTRACT: Back ground. The goal of the paper was to evaluate the effect of 7-day training in high mountains on the aerobic and anaerobic fitness parameters in alpine skiers as well as the extent and direction of changes in rest nucleotide concentration and metabolic reaction to test exercise. Material and methods. The sample comprised seven males training alpine skiing. The study of aerobic and anaerobic fitness was conducted twice, before the trip to the glacier and immediately after return. The evaluation of aerobic fitness was based on the values of aerobic threshold pathways and the oxygen threshold (VO2max). The parameters were determined using a portable ergospirometer Oxycon Mobile during the treadmill test performed with increasing intensity. 30-second Wingate test was applied for defining oxypurine concentration. During each test, performed under rest and exercise conditions, the blood level of oxypurines, hypoxanthine, xanthine and uric acid was assayed; lactate (LA) concentration and selected parameters of acid-base balance (ABB) were assayed in the capillary blood. Results. VO2max level during the first and the second test was 47.82±6.02 and 48.21±6.07 ml/kg/min respectively and did not significantly change. After the treadmill exercise test, a significant increase in LA and ABB parameters. The applied training resulted in significant increase (p<0.05) in anaerobic fitness, measured as the value of maximal power in W/kg to 9.74±0.71 and 10.39±0.86 respectively, before and after the event. The training did not cause significant changes in rest and post-exercise values of the measured biochemical parameters. Conclusions. The seven -day training in high mountains favourably affected anaerobic fitness of the skiers without marked changes in the level of their aerobic fitness. The 7-day event was too short to improve exercise metabolism and circulatory-respiratory fitness of the athletes.
    Full-text · Article · Oct 2010
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    ABSTRACT: The aim of the study was to assess pulmonary function in patients after spinal fusion combined with thoracoplasty in comparison with subjects in whom thoracoplasty was not performed, but who underwent intensive rehabilitation. MATERIAL NA DMETHODS: The study population consisted of two groups of adolescent girls about two years after surgical correction of scoliosis by Cotrel-Dubousset method. The subjects in the first group (thoracoplasty group) underwent spinal fusion in combination with thoracoplasty, which consisted in subperiosteal resection of deformed segments of six ribs on top of the rib hump. Patients in the second group (rehabilitation group) had no thoracoplasty, but participated in a 4-week rehabilitation programme based on endurance training. Pulmonary function was assessed in all subjects with resting spirometry. Additionally, maximal oxygen uptake was determined using an indirect method. Spirometric parameters at rest were significantly higher in subjects participating in the rehabilitation program compared to the thoracoplasty patients. VO2max values were similar in both groups, indicating relatively good exercise capacity. Comprehensive motor rehabilitation based on endurance training has a favorable influence on pulmonary function in patients after surgical correction of scoliosis. A rehabilitation program should be included in the management of patients after spinal fusion combined with thoracoplasty.
    No preview · Article · Jan 2009 · Ortopedia, traumatologia, rehabilitacja
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    ABSTRACT: The aim of the study was to assess the influence of an 8-week aerobic physical activity program on oxidative stress markers, antioxidant parameters, and selected metabolic parameters in healthy, postmenopausal women. The study was carried out in a group of 41 healthy women (mean age 65 years) participating in an 8-week cycle ergometer physical workout of moderate intensity. Before and after completing the training program, the following parameters were assessed: total antioxidant status (TAS) and concentrations of thiobarbituric acid reactive substances (TBARS) in plasma, serum levels of antibodies against oxidatively modified low-density lipoproteins (LDL) (oLAB), serum concentrations of glucose, high-density lipoprotein cholesterol (HDL-C), triglycerides (TG), insulin, and reduced glutathione (GSH) concentrations in red blood cells (RBC). Atherogenic index of plasma (AIP) and insulin resistance index (HOMA(IR)) were calculated. The 8-week aerobic physical activity program resulted in significant decrease (p<0.01) in serum glucose and LDL-cholesterol (LDL-C) levels, plasma TBARS concentrations (p<0.05), and in significant decrease of HOMA(IR) (p<0.01). TAS of plasma and GSH concentrations in RBC increased significantly (p<0.01) over the study period. The results show that an 8-week aerobic training enhanced insulin sensitivity, and improved the balance between oxidants and antioxidants in healthy, postmenopausal women.
    No preview · Article · Dec 2008 · Archives of gerontology and geriatrics
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    ABSTRACT: Background. The aim of the study was to compare the antioxidant potential in the preparatory period with the antioxidant potential in the competitive period in sprinters. Material and methods. Twelve sprinters of the national team were examined twice: at the and of the general preparation subphase and just after the competitve subphase (immediately after indoor competition). An incremental exercise protocol for endurance capacity was conducted on the treadmill. Before and after the test, capillary (fingertip) and venous (elbow vein) blood was taken. The antioxidant potential of plasma, i. e. ferric reducing ability of plasma (FRAP) and thiobarbituric acid-reactive substances in serum (TBARS), were measured by means of enzymatic method on spectrophotometer. The concentration of allantoin (All) was determined using HPLC-method. Results. In the competitive period, examined sprinters showed lower average level of maximal oxygen uptake and longer time of reaching anaerobic threshold than in the preparatory period. In the competitive period, pre-exertion concentrations of TBARS and All were lower and pre-exertion concentration of FRAP were higher than in the preparatory period. Conclusions. The executed speed-power training was brought about the decline of aerobic capacity in sprinters as well as resulted in a distinct shift of the anaerobic threshold towards higher test loads. The changes in biochemical parameters during the test exertion indicate that the specific training had a positive effect on the antioxidative potential of examined athletes in the competitive period.
    Full-text · Article · Jan 2008
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    ABSTRACT: The aim of study was to investigate the association between oxidative stress and anthropometric and metabolic parameters in middle-aged, overweight or obese women. Venous blood samples were taken from each subject after an overnight fast, and the following parameters were assessed: plasma total antioxidant status (TAS), plasma concentrations of thiobarbituric acid reactive substances (TBARS), serum levels of antibodies against oxidized low density lipoproteins (oLAB), serum lipid profiles, and serum glucose and insulin concentrations. Additionally, serum low density lipoprotein (LDL) cholesterol and insulin resistance indices and atherogenic index of plasma (AIP) were calculated. Correlations were noted between plasma thiobarbituric reactive substances (TBARS), antibodies to oxidized LDL (oLAB), and total antioxidant status (TAS); and blood pressure (BP), insulin resistance parameters and lipids profile. The levels of antibodies to oxidatively modified low-density lipoproteins oLAB correlated with systolic and diastolic BP, TAS correlated negatively with the atherogenic index of plasma (AIP). An association was found between oxidative stress and BP, and lipid risk factors in obese and overweight women.
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