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At least 235 records · Page 13Linked to original sources
PubMed2000

LDL peroxidation in adolescent female gymnasts.

UNLABELLED: Physical exercise may in vivo promote an increase of free radical formation. Low-density lipoproteins (LDL) are highly susceptible to oxidation, probably because of their high polyunsaturated fatty acid content, since lipid oxidation is an important factor in the genesis and development of atherosclerosis. The aim of the present study is to evaluate the effect in a group of adolescent gymnasts, of intense and regular physical exercise on lipid profile and redox status. POPULATION: All members of the Portuguese National Team of Rhythm Gymnastics (1996) (n = 20). METHODS: 1. Clinical evaluation 1.1 Anthropometric evaluation: weight, height, triceps, biceps, subscapular and supra- and supra-iliac skinfolds. NCHS were used as the standard of reference for weight and height, and Frisancho for the sum of skinfolds; 1.2. Evaluation of nutritional status (Quetelet body mass index) and body composition (Durnin and Siri). 2. Evaluation of biological parameters: a blood sample was collected after 12 hours fasting and 24 hours detraining, to evaluate: 2.1 Lipid profile: total cholesterol, high (HDL) and low (LDL) density lipoproteins, triglycerides, apolipoproteins A1 and B, were measured using internationally recommended laboratory methods; 2.2. Plasma trace elements: zinc, copper and selenium, by atomic absorption; 2.3 Red blood cell enzymes; transmembranar reductase (TMR), metahemoglobin reductase (MethaHbRed) and acid phosphatase, by spectrophotometry; 2.4. Redox status: MDA and MDA-LDL were evaluated by spectrophotometry. 3. Evaluation of eating habits: 24 hr recall. RESULTS: Chronological age is 14.3 +/- 1.7 years. Nutritional assessment shows a mean value for height near the 50th percentile (99% +/- 3.8), and low mean values respectively for BMI (89.3% +/- 9) and sum of triceps and subscapular skinfolds (51.9% +/- 14). Study of lipid profile shows low mean values for total cholesterol (162.3 mg/dl +/- 27.7) LDL-cholesterol (87.6 mg/dl +/- 22.6) and Apo B (64.4 mg/dl +/- 11.5), but high values for HDL-cholesterol (61.3 mg/dl +/- 14.5) and Apo A1 (173.1 mg/dl +/- 25.1). We observe higher values for total cholesterol and LDL-cholesterol in those with lower Cu plasmatic levels. We also observe a negative significative correlation between MDA-LDL and Zn (r = -0.469), Cu (r = -0.524) and RTM (r = -0.608). CONCLUSIONS: The AA concluded that in this group of gymnasts intense physical exercise induces, a favorable lipid profile, but a clear susceptibility to LDL peroxidation in those with lower plasma Cu and Zn values. It is possible that the negative correlation observed between MDA-LDL and TMR is caused by higher consumption of TMR induced by the action of exercise on the oxidative system.

Adolescent↗
PubMed2003

High-load coordination dynamics in athletes, physiotherapists, gymnasts, musicians and patients with CNS injury.

High-load coordination dynamics were measured in athletes, physiotherapists, gymnasts, musicians, patients with spinal cord injury and a patient with multiple sclerosis during exercise on a special coordination dynamic therapy device to quantify improvement in the central nervous system (CNS) organization due to therapy in patients and to quantify differences in the CNS organization between healthy subjects and patients with CNS injury. The values of high-load coordination dynamics for the group of athletes were two times better than those of physiotherapists, gymnasts and musicians, but still two times poorer than the best value achieved so far in a patient with a spinal cord injury after 10 months of continuous intensive coordination dynamics therapy. Especially the physiotherapists, gymnasts and musicians had poor coordination between arms and legs for the difficult intermediate coordinations between pace and trot gait for high load. Exhaustion of the CNS and improvement of CNS functioning in the short-term memory could be made visible using hysteresis-like curves for load increase and decrease. When not receiving therapy, patients with CNS injury could not turn at high loads, and showed poor coordination at lower loads only. After exercising 7,000 coordinated arm and leg movements per month, the CNS organization for high load improved in 3 healthy subjects by 36%. In patients with CNS injury, such improvements of high-load coordination dynamics took several months of intensive coordination dynamics therapy including 350,000 coordinated movements per months. The rate of learning may differ in healthy subjects and patients very approximately by a factor of 50 depending on the severity of the injury. On the other hand however, the high-load coordination between arms and legs, necessary for walking could be improved during therapy even in patients with multiple sclerosis, with the consequence that they could manage better in every day life.

Adult↗
PubMedDate not supplied

[Effect of antenatal gymnastics on childbirth: a study on 50 sedentary women in the Republic of Benin during the second and third quarters of pregnancy].

Antenatal gymnastics is a form of non-pharmacological childbirth preparation methods. It helps maintain rachidian statics and to relieve painful syndromes (joints, lumbar pains) during pregnancy. It also helps correct gravidic problems (leg cramps, back ache, weight increase, etc.). It is both a physical and psychological training method in accordance with the natural mechanisms of childbirth, implying personal involvement on the part of the parturient. Fifty (50) pregnant women of Benin (apart from pathological pregnancies) divided into two groups of 25 subjects (experimental group) and 25 subjects (control group) voluntarily took part in the study after having given their written assent. Each involved subject is paired with a counterpart of control following the same criteria: age of the gestante, parity, characteristic of the pelvis. Subjects aged from 17 to 42 trained twice a week with a minimum of 24 hours rest between two sessions; the training period intensity of exercise is limited to 60% of the maximum heart frequency and each training session lasts 45 min. The results show a lower number of caesareans and a significant lower number of untorn perineas in the experimental group. Apgar scores are also statistically higher in the children of trained women. This study confirms that sedentary pregnant women without any medical counter-indications (repetitive miscarriages, premature births, placenta praevia, cervical gaping, cardiac diseases, hypertension, narrow pelvis) can participate in antenatal gymnastics at a moderated rhythm, for their own benefit and that of their babies. Muscular force improvement (quality of the abdominal pushing), psychological control (absence of stress and panic), and good body form, can be noticed in trained mothers. However, abnormal presentation of baby, fetal suffering and the inherent characteristics of the pelvis (narrow) are factors requiring a caesarean. On the whole, antenatal gymnastics is an effective non-pharmacological means to avoid complications in childbirth. This method might be one of the solutions which could benefit pregnant women in Africa, considering its low cost compared to the exorbitant cost of medicines and hospitalisation.

Adolescent↗
PubMed1986

Mechanical contribution to lumbar stress injuries in female gymnasts.

Because female gymnasts as a group display higher than average incidences of stress-related pathologies of the lumbar spine, it was of interest to evaluate mechanical factors which are potential contributors. Lumbar hyperextension and impact forces were quantified for performances of five commonly executed gymnastics skills by four competitive collegiate women gymnasts. The skills performed were the front walkover, the back walkover, and the front handspring, the back handspring, and the handspring vault. Wielke's (1983) radius method was used to quantify lumbar curvatures from film data during normal relaxed standing postures and during subject performances of the five selected skills. A force platform was used to monitor vertical and lateral ground reaction forces at the terminations of the respective skill performances. Of the skills examined, the handspring vault produced the highest vertical and lateral impact forces, and the back handspring and back walkover required the greatest amounts of lumbar hyperextension. During the front and back walkovers and during the back handspring, maximum lumbar hyperextension occurred very close to the time that impact force was sustained by either the hands or the feet.

Athletic Injuries↗
PubMed1985

Introduction and history of gymnastics.

All ancient societies have been documented as having various aspects of gymnastics in their overall pattern of health and conditioning. In 700 BC the Athenians added gymnastics to Olympic competition; television coverage of gymnastics in the modern Olympics, combined with a heightened interest in physical fitness in general, has led to a resurgence of interest in this sport.

Gymnastics↗
PubMed1985

Elbow injuries in gymnastics.

The medical literature contains little about elbow injuries in gymnastics. However, 30 females with 32 elbow injuries from gymnastics were found and studied. Two had Panner's disease (osteochondritis of the humeral capitellum), and all the others had fractures or dislocations. The majority required open or closed procedures. Recommendations to help reduce elbow injuries would include the use of experienced spotters, thicker pads whenever possible, and education of gymnasts in techniques of falling. After injury has occurred immobilization of the elbow for as short a period as necessary and follow-up therapy in a sports-oriented setting are recommended.

Adolescent↗
PubMed1979

Growth patterns of elite French-Canadian female gymnasts.

In the present investigation, an elite group of competitive female French-Canadian gymnasts (N = 7) were evaluated using 35 standardized morphological measures at an interval of 475 days. At the two evaluatione, the average age of the gymnasts was 13.9 and 15.3 years and at the termination 4 of the 7 girls had not yet reached menarche. Standard body lengths, widths, skinfolds and proportions were measured. Almost everybody dependent variable increased significantly while the body proportions, for the most part, stayed the same. Skinfold measures of body fat tended to remain the same or to decrease over this period. In comparison to other reference groups of female gymnasts tested over the last 10 years, these elite competiters were younger, smaller, and lighter reflecting the present day trends. Implications of this decreased body size were discussed in terms of the potential mechanical advantages that accompany these characteristics.

Adolescent↗
PubMed1981

[Spinal lesions following modified exercises in adolescent high performance gymnasts].

20 high performance gymnasts between 14 and 22 years of age had an anamnestical, clinical and radiological checkup on the spine in order to assess news training-methods. Radiologically only 3 gymnasts were found to be without any pathological manifestation. 7 cases of M. Scheuermann were located. The other athletes showed degenerative findings of vertebral columns especially in the thoracic-lumbar transition. These degenerative signs, and the fact tht the gymnasts had no spondylosis, are the result of new exercises, which avoid extreme bending load in the lowest segment of the lumbar region. Anamnestical and radiological findings do not correlate. A critical medical screening is necessary before and during high performance training.

Adolescent↗
PubMed1994

Does group gymnastics at the workplace help in neck pain? A controlled study.

The effects of group gymnastics on neck pain were studied among 44 women in a printing company. A randomized cross-over design was used with two groups matched according to the work task, frequency of symptoms, and age. The treatment consisted of gymnastics for 45 min once a week for 10 weeks. Neck pain was rated by visual analogue scale and pressure pain sensitivity of the neck muscles was measured with an algometer. The results showed no clear effects of the group gymnastics program. An equal and significant reduction in pain ratings was seen in both groups after the first intervention in the spring. Recurrence of symptoms was seen in both groups in September, and no significant reduction in pain occurred during the second intervention in the autumn. The results suggest a seasonal variation in neck symptoms which has to be considered when planning or evaluating intervention studies.

Adult↗
PubMed1993

Injuries to elite gymnasts over 10 yr.

This retrospective study of 42 male and 74 female elite (artistic) gymnasts at the Australian Institute of Sport (AIS) reviews all the injuries reported between 1982 and 1991 (inclusive). The injuries were categorized according to type of injury and their specific anatomical distribution. The study also analyzes the incidence of stress fractures in the gymnasts and the prevalence of spondylolysis. Although it is noted from the literature that gymnastics can be a hazardous sport, this study demonstrates an absence of catastrophic injuries and a low number of severe injuries.

Adolescent↗
PubMed1998

[Nutritional behavior of female and male high performance gymnasts].

Elite gymnasts pass through their whole physical and intellectual development with intensive physical training. In this period malnutrition can lead to delayed pubertal development with insufficient growth spurt and an increased incidence of stress fractures or osteoporoses. Different aspects about nutrition like body composition, objective and subjective eating-behaviour and sex-specific differences will be evaluated in our study. We examined 22 elite female gymnasts (age: median = 13.5 [12.0-16.1] years) und 19 elite male gymnasts (age: median = 12.3 [10.1-14.8] years). The following anthropometric measurements were carried out: weight, length, body mass index, upper arm circumference, arm muscle area, triceps skinfold, arm fat area. Eating diaries were compared with the recommendations of the German Federation of Nutrition and subjective eating behaviour was evaluated by questionnaires. Measurement of body composition showed an increase of musclemass at the cost of fatmass. The girls were smaller and leaner than the boys. Caloric intake in both groups was insufficient. Moreover the girls showed a tendency towards pathologic eating behaviour.

Adolescent↗
PubMed1988

Effects of gymnastics training on postural responses to stance perturbations.

The aim of the present experiment was twofold: (a) document the developmental course of postural responses to stance perturbations causing backward body sway and (b) investigate the plasticity of these responses by assessing the changes occurring in their organization as a result of gymnastics training. Fourteen untrained children (7 to 10 and 11 to 16 years old) and 15 age-matched gymnasts were tested on a movable platform. Four conditions were used: two-legged vs. one-legged stance x vision absent vs. present. Effects of age and training were assessed on the response latencies of eight muscles. Results showed no significant effect of age, but both stance and visual conditions affected the untrained subjects' response latencies. Wee found a significant effect of training on the response latency for the upper body muscles located on the frontal aspect of the body. This effect reflects an increase in gymnasts' response latencies as compared with controls'. Stance, but not vision, affected the responses of the trained subjects. Some implications of these results are discussed.

Journal Article↗
PubMed1980

Behavioral coaching in the development of skills in football, gymnastics, and tennis.

A review of the literature indicates that methods of skill acquisition based on the operant paradigm have been scientifically validated with many motor behaviors. However, these procedures have been limited to the use of positive reinforcement for correct performance when applied to the acquisition of complex sports skills in natural settings. To find complementary procedures to enhance skill acquisition, a coaching method involving several behavioral techniques was developed that focused on remediation of errors. This coaching method combined the following components: (1) systematic use of verbal instructions and feedback, (2) positive and negative reinforcement, (3) positive practice, and (4) time out. Three sports, football, gymnastics, and tennis, were selected to determine the effectiveness and generality of this behavioral coaching method. A total of 23 male and female subjects, ranging in age from 11 to 35, was included in this study. Baseline data were first collected for each sport under standard coaching conditions. Next, the behavioral coaching method was evaluated depending on the sport in either a multiple baseline or a reversal design. The behavioral dimensions selected were blocking in football; backward walkovers, front hand springs, and reverse kips in gymnastics; and the forehand, backhand, and serve in tennis. Behavioral coaching was immediately effective in increasing the correct execution of complex skills in all three sports. Gains of up to 10 times the baseline performance were achieved in each sport. In football, behavioral coaching resulted in an increase in correct blocking performance from a baseline average of 5% to 51.3%. Gymnasts' performances increased from baseline averages of 2.7% to 52.6% across the three skills. In tennis, standard coaching produced an average of 6% correct performance which increased dramatically under behavioral coaching to 57% across the three strokes. The success of the behavioral coaching package used here suggests that a technology of behavior may offer additional and complementary strategies to the acquisition of motor skills in the natural environment.

Journal Article↗
PubMed1995

Coping processes in competitive gymnasts: gender differences.

The Ways of Coping with Sport questionnaire was used to investigate coping with performance problems in a sample of 115 adolescent gymnasts. The coping processes reported most frequently by the total sample of gymnasts were Increased Effort and Resolve, Wishful Thinking, Seeking Social Support, and Problem-focused Coping. Analysis of gender differences by multivariate analysis of variance indicated that, compared with males, the female gymnasts were more likely to use Seeking Social Support to cope with slumps in performance. The findings were consistent with previous research on coping in sporting and nonsporting populations.

Adaptation, Psychological↗
PubMed2001

Madelung Deformity in a Collegiate Gymnast: A Case Report.

OBJECTIVE: To present the case of a 21-year-old female collegiate gymnast with acute left wrist pain. BACKGROUND: Madelung deformity is a developmental abnormality of the wrist. It is characterized by anatomic changes in the radius, ulna, and carpal bones, leading to palmar and ulnar wrist subluxation. It is more common in female patients and is usually present bilaterally. The deformity usually becomes evident clinically between the ages of 6 and 13 years. DIFFERENTIAL DIAGNOSIS: Traumatic distal radius physeal arrest, congenital anatomic variant. TREATMENT: The athlete was treated with symptomatic therapeutic modalities and nonsteroidal anti-inflammatory medication for pain. She was able to continue to participate successfully in competitive gymnastics, minimally restricted, with the aid of palmar wrist tape and a commercially available wrist brace to prevent end-range wrist extension. UNIQUENESS: Madelung deformity can result in wrist pain and loss of forearm rotation, leading to decreased function of the wrist and hand. This patient was able to participate successfully in elite- and college-level gymnastics with no wrist pain or injury until the age of 21 years. Furthermore, she was able to continue to participate, experiencing only periodic pain, with the aid of taping and bracing support and without the need for reconstructive surgery. CONCLUSIONS: Although rare, Madelung deformity is typically corrected surgically in athletes with chronic pain and disability. This case demonstrates an example of successful conservative management in which the athlete continued to participate in sport.

Journal Article↗
PubMedDate not supplied

Serum zinc in highly trained adolescent gymnasts.

Serum zinc was measured in 20 adolescent gymnasts (9 boys, 11 girls, age 12-15 yr) explored for detecting possible adverse effects of intense training on pubertal maturation and growth. They had low serum zinc (0.599 +/- 0.026 mg/L) when compared to matched control sedentary children (n = 118 mean 0.81 +/- 0.014 p < 0.001). Girls had lower zinc than boys (0.557 +/- 0.023 vs 0.651 +/- 0.044 p < 0.001). Zinc was correlated to isometric adductor strength (r = 0.468 p < 0.05). Children with serum zinc < 0.6 mg/L had lower insulin-like growth factor binding protein 3 than others (2.326 +/- 0.264 vs 2.699 +/- 0.12 p < 0.01). Thus, zinc is lowered in trained adolescent gymnasts and even lower in females. This reduction could play some role in abnormalities of puberty, growth, or muscular performance.

Adolescent↗
PubMed2002

Differences in strength and surface electromyogram characteristics between pre-pubertal gymnasts and untrained boys during brief and maintained maximal isometric voluntary contractions.

The present study was aimed at investigating differences of maximal strength (F(max)) of the elbow flexors and characteristics of the surface electromyogram (EMG) between six gymnasts (G) and six untrained (UT) 10-year-old boys during brief and maintained maximal voluntary isometric contraction (MVC). The F(max) was estimated during 5 s MVC (maximal test, MT) and normalized to the cross sectional area (CSA) of the arm. The EMG signal of the biceps brachii was recorded during MT and during a 25 s maintained MVC (fatigue test). Values were calculated for root-mean-square (rms(MT)) and mean power frequency (MPF(MT)) of the EMG signal for the duration of the MT. For the fatigue test, MPF were normalized to the initial value (MPF(n)) and kinetics were expressed by the slope coefficient of linear regression. Although F(max) and F(max)/CSA tended to be higher for G than UT, the differences did not reach significance. The MPF(MT) was significantly higher for G [mean (SD)][136 (8) Hz] than for UT [125 (9) Hz]. The MPF(n) slope coefficients were significantly greater for G than for UT [-1.0 (0.2) and -0.5 (0.3), respectively]. When all the children were considered, F(max) was significantly correlated to MPF(MT) (r = 0.61). These results showed that gymnasts tend to have higher F(max) and F(max)/CSA accompanied by a significantly higher MPF(MT) and a steeper MPF downshift. Moreover, children with greater strength tended to have higher MPF(MT). It is suggested that spatial and/or temporal recruitment of more fatigable fast motor units could have been enhanced in G and more generally, that it could be a mechanism that would explains, in part, the level of force production in children.

Child↗
PubMed2000

Sural nerve facilitation of the soleus muscle H-reflex in high level gymnasts.

The effect of a non-nociceptive sural nerve stimulation on the H-reflex was examined in 6 young female gymnnasts and 12 control subjects. At the 70-90 ms delays investigated between conditioning and test stimulations, the sural nerve stimulation produced a facilitation that did not differ significantly between the gymnast group (6.15% of the maximal H-reflex size, Hmax) and the control group (8.12% Hmax). The intersubject dispersion was significantly larger in the control group (0.30%-21.04% Hmax) than in the gymnast group (4.44%-7.70% Hmax). It is suggested that this narrow range of sural nerve facilitation may have resulted from the prolonged specific training of these sportswomen.

Adolescent↗