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At least 19 recordsLinked to original sources
PubMed2026

Acute Performance, Mechanical and Thermal Effects of Isometric Conditioning Versus Standardized Volleyball Pre-Training Activation in Highly Trained Male Players.

This study compared acute performance, neuromuscular, and thermal responses to a maximal isometric conditioning activity (ICA) versus a standardized volleyball pre-training activation (VPA) in highly trained male volleyball players, and to explore putative mechanisms underpinning post-activation performance enhancement (PAPE) considering training load. In a randomized crossover, 14 men (27 ± 3 y) completed two sessions: VPA (mobility/plyometric drills; 9 min), and ICA comprising 3×5×3-s maximal isometric back-squat contractions (knee angle 120°; 3-min inter-set rest). Countermovement jump (CMJ) height (primary), relative peak power (PP), RSImod, and contraction time (CT) were recorded pre and 3, 6, 9, and 12 min post. Rectus femoris muscle viscoelastic properties and skin surface temperature (SST) were assessed at matched time points. Analyses used repeated-measures ANOVA, responder analysis, correlations, and regression. Period×Sequence interactions favored ICA for CMJ and PP when delivered in Period 2 (lower training volume): ∆CMJ was higher under ICA versus VPA (p = 0.005, d = 1.20); PP likewise greater (p = 0.026, ηp2 = 0.35). ICA yielded more beneficial responders than VPA (9/14 vs 1/14; McNemar exact p = 0.021). In Period 2, reductions in rectus femoris muscle stiffness independently predicted CMJ gains (β_std = -0.495, p = 0.005), whereas SST changes did not (p = 0.974). RSImod and CT showed no differences. A brief, high-effort isometric squat protocol was associated with superior acute improvements in jump performance compared with a standard volleyball warm-up, but this advantage emerged specifically when the preceding training volume was reduced (Period 2), suggesting that residual fatigue from training may reduce the effects of PAPE. Gains align with neuro-mechanical rather than thermal mechanisms, supporting ICA as a practical, equipment-minimal priming strategy for elite volleyball.

Humans↗
PubMed1984

What is the meaningful measure of neuronal spike train activity?

Neuronal spike train activity is conventionally viewed in terms of certain measures of central tendency (mean or median of intervals between discrete events or mean rate of such events) and their associated measures of variability (S.D., skew, etc.). Less commonly, investigators will compute the probabilities of occurrence in an Information Theory context. Another rarely considered measure of spike trains is serial ordering. Seldom is more than one of these approaches applied to the same spike train, and we are unaware of any case where all 3 have been applied to the same train. In order to test the inter-relationships among these approaches, we examined the same spike trains with all 3 analytic methods. Measures of central tendency were taken from the original absolute interval values, whereas entropy and serial order (Markov order) were computed from the sequences of patterns of adjacent intervals, expressed in the same non-parametric format. We found that entropy (measure of uncertainty) did not correlate well with the degree of serial ordering (Markov order). Entropy also did not correlate well with measures of central tendency (median or mean interval, or impulses/s) nor with the variability of such measures. An inverse correlation was seen between Markov order and several measures of central tendency (mean interval and rate) as well as with several measures of variability. The implications of these analyses extend beyond the analysis of spike trains to most all biological and physical time series. For neurophysiologists, these analyses may challenge our common assumptions about the most appropriate way to describe and interpret neuronal spike train activity.(ABSTRACT TRUNCATED AT 250 WORDS)

Action Potentials↗
PubMed1986

Differences between the effects of two meclofenoxate doses on active training for two-way avoidance in rats.

Male Wistar rats were trained for active two-way avoidance in a shuttle-box apparatus for five consecutive days. Meclofenoxate, in doses of 100 and 300 mg/kg i.p., was applied in two separate groups of rats, 60 min before the beginning of the training. Meclofenoxate (Mf), applied in a dose of 100 mg/kg, slightly improved the avoidance training, whereas in a dose of 300 mg/kg it "deteriorated" learning during the last two training days. Retrospective analysis of the experimental results showed that Mf caused a dose-dependent increase in the percentage of rats who were "poor learners", compared with the percentage of "poor learners" among the controls. On the other hand, the Mf-treated "good learners" manifested an essentially better capacity for avoidance training, compared with the control "good learners". The data obtained suggest that Mf increases the adaptational capacities of rats trained for active avoidance possibly in two different ways: in part of the animals it causes improvement of the conditioned reflex activity, in another part of the animals it increases their resistance to the stressogenic stimuli used during such a training.

Animals↗
PubMed1998

Early active training after lumbar discectomy. A prospective, randomized, and controlled study.

STUDY DESIGN: A prospective, randomized, and controlled study was conducted. OBJECTIVES: To evaluate two training programs, both of which started immediately after lumbar discectomy. SUMMARY OF BACKGROUND DATA: In previous studies, patients began physiotherapy between 4 weeks and 60 months after surgery. No studies have been conducted to evaluate a physiotherapy program that begins immediately after surgery. METHOD: Twenty-six patients were treated according to an early active training program. Twenty-six patients were treated with a traditional, less active training program (control group). All patients were examined immediately before and after surgery and 3, 6, 12, and 52 weeks after surgery by an unbiased observer. Two years after surgery, patients completed a questionnaire. Range of motion of the lumbar spine and straight leg raising were measured. pain intensity and location was measured by a visual analog scale. The duration of sick leave was documented. RESULTS: Six and 12 weeks after surgery, patients with dominating residual leg pain had significantly less intense pain in the early active training group than those in the control group (P < 0.05). Twelve weeks after surgery, range of motion of the lumbar spine was significantly more increased in the early active training group (P < 0.01). One year after surgery, there was no significant difference between the groups regarding the duration of sick leave, results in a positive straight leg raising, or pain intensity. Twenty-two (88%) patients in the early active training group and 16 (67%) in the control group were satisfied with the treatment outcome 2 years after surgery (P < 0.10). CONCLUSIONS: Patients rehabilitated according to the early active training program had a better short-term outcome of objective values. At 2 years' follow-up, more patients were satisfied with the result of the operation. The early active treatment program is recommended.

Adult↗
PubMed2005

Heart rate and blood lactate concentrations as predictors of physiological load on elite soccer players during various soccer training activities.

The purpose of this investigation was to estimate the physiologic strain on players during various soccer training activities. Ten soccer players from the first division soccer league of Turkey were used as subjects. The heart rate responses were measured during 4 types of soccer training. First, the heart rates that corresponded to a blood lactate concentration of both 2 and 4 mM were measured, and then, during the 4 types of training, they were correlated with the proportion of time that the heart rate was below the 2-mM lactate line, between the 2- and 4-mM lactate lines, and above the 4-mM lactate line. Mean heart rates during friendly match, modified game, tactical training, and technical training activities were 157 +/- 19, 135 +/- 28, 126 +/- 21, and 118 +/- 21 b.min(-1), respectively. The differences between all of these soccer training activities were statistically significant (p < or = 0.01). The results demonstrate that (a) technical and tactical training consisted of very low exercise intensities (most of the heart rates were below the 4-mM lactate level) and (b) the percentages of time that the heart rate correlated to a point above the 4-mM lactate reference level during the friendly match and modified game were 49.6 +/- 27.1% and 23.9 +/- 24.5%, respectively. The practical implications of these findings are that, by using 2- to 4-mM reference lines, coaches can structure heart rate zones that can help determine the individualized exercise intensity for their players as well as estimate overall exercise intensity during soccer training.

Adaptation, Physiological↗
PubMedDate not supplied

[Drug costs in reformed primary care: effect of training activities on drug savings].

OBJECTIVE: To determine the influence on drug expenditures by reformed primary care services of factors relative to the personal characteristics of prescribers, their training and training activities, their professional practice, organizational factors, and characteristics of the patient population attended. MATERIAL AND METHODS: This cross-sectional, observational study was carried out in the Sabadell Primary Care Directorate, Vallés Occidental region (Barcelona, Spain). This primary care directorate is responsible for the health-care needs of 9 municipalities (with a total population of 254,971 inhabitants). It has 12 Basic Health Areas, 8 of which have Primary Care Teams. The area of study included these 8 primary care teams and the unit of analysis contained 68 of 80 staff physicians. The quantitative prescription indicators (dependent variables) were: total annual drug expenditure, drug expenditure per user and year (users being understood as patients with an open medical record), drug expenditure per visit and year, mean cost per prescription, prescription/user ratio, and prescription/visit ratio. Descriptive, bivariate, and multiple linear regression analyses were made. RESULTS: The variables predictive of greater drug expenditures were: patient age, visits, frequentation, referrals to primary-care specialists, urban municipality, physicians with primary care and hospital practice, time on staff, and physician age. Participation in training activities was predictive of drug savings, with each primary-care training session attended producing a mean annual savings in drug expenditures of 50 ptas and 15 ptas per user and visit, respectively. Every hour dedicated to training in the community produced a savings of almost 60,000 ptas in annual drug expenditures. For each rational-drug-use session, the mean price of prescriptions decreased by 52 ptas. In the multiple linear regression models obtained, the variables that most frequently helped to explain variations between prescribers in relation to drug expenditures were: patient age, urban municipality, and primary-care-team training activities (as factors in drug savings). CONCLUSIONS: This study confirmed that patient age, frequentation, and type of municipality increased drug expenditures. Urban municipalities, as opposed to rural or semirural municipalities, were associated with a significantly greater expense, in contrast with prevailing opinion. Our results suggested that drug expenditures increase with referrals to specialists. An interesting new finding is that physicians with simultaneous primary care and hospital practice generated more drug expenditures. Finally, we emphasize the importance of training the primary-care team in promoting drug savings (four models: drug expenditures by users, drug expenditures per visit, prescriptions per user, and prescriptions per visit), rational-drug-use activities, which tended to reduce the mean cost of prescriptions, and community training activities, which clearly reduced annual total drug expenditures.

Aged↗
PubMed1997

The nature and extent of training activities in clinical pathology required for effective consultation on laboratory test selection and interpretation.

OBJECTIVE: The goal of this study was to identify the activities in clinical pathology training and the length of time required in each to effectively train residents as consultants on laboratory test selection and interpretation. METHODS: The information needed to address these questions was obtained from a study of 20 residents in clinical pathology at our institution between 1990 and 1996. In the survey participants were asked to assess the value of specific training activities in developing their confidence when addressing consultative questions on laboratory test use and interpretation. Participants were also asked to assess the length of time required to gain confidence in performing this role. RESULTS: The results of the study demonstrate that confidence in providing advice on clinical laboratory test selection and interpretation is acquired to a significant but not absolute degree after an intense 8-week experience in a single clinical laboratory subspecialty, during which time no other responsibilities are assigned. The data also indicate that interactions with clinical pathologists and formal lectures provided to the trainees during their rotations are critical components of the consultation service. There was a significant decrease in the length of time required to provide effective information on test selection and interpretation as the residents progressed through their training. CONCLUSIONS: For all of the major subspecialties in clinical pathology, the residents gained significant confidence by 4 weeks of intense training, and by 8 weeks participants were very confident in answering consultation questions. Even after 8 weeks, however, fewer than 10% of the residents felt absolutely confident in their own decisions regarding laboratory test use and interpretation prior to discussion with senior residents and faculty. Thus, acquisition of expertise to effectively provide advice on laboratory test selection and interpretation required up to 8 weeks of focused training in each clinical laboratory subspecialty. Gaining confidence in multiple areas requires a significant commitment of full-time training. This study provides an understanding of the type and extent of training required to attain the skills necessary to effectively provide consultation in clinical pathology.

Clinical Competence↗
PubMed2003

Stroke volume response to incremental submaximal exercise in aerobically trained, active, and sedentary men.

Stroke volume response of trained cyclists (n = 10; Trained), active but untrained men (n = 10; Active), and sedentary men (n = 10; Sedentary) was determined by impedance cardiography during cycle ergometer exercise. For the Trained, at a heart rate of 90 beats. min(-1), stroke volume increased by 27% compared to baseline levels, whereas stroke volume of Active and Sedentary groups did not significantly increase. Throughout exercise indices of ventricular emptying and filling of Trained were significantly greater than that of the other two groups whereas ventricular rates of the Active were significantly greater than those of the Sedentary. Throughout exercise cardiac contractility of the Trained was significantly greater than the other two groups. Results indicate that despite similar resting heart rate, stroke volume, and body mass, Trained compared to Active men significantly enhanced stroke volume, ventricular filling, and cardiac contractility during incremental ergometry exercise. Active compared to Sedentary men, however, displayed significantly larger stroke volume and ventricular filling rates during ergometry. We conclude that impedance cardiography indices of ventricular performance of aerobically trained men were superior to those of active, untrained men possessing similar resting stroke volume and heart rate. Furthermore, the ventricular performance of the active men possessing large resting stroke volume was superior to that of sedentary men.

Adolescent↗
PubMed1992

Cause-specific mortality of white-tailed deer as influenced by military training activities in southwestern Oklahoma.

Radio-telemetry was used to monitor movements and mortality of 56 white-tailed deer (Odocoileus virginianus) in response to intensive military training activities on West Range (18,000 ha), Fort Sill Military Reservation, Oklahoma. Cause-specific mortality was determined for 22 radio-collared deer, including adults (greater than or equal to 2.0-yr-old), yearlings (0.6-1.9-yr-old), and fawns (less than or equal to 75-day-old age group) from 1987 to 1989. Winter home ranges were largely confined to a 14,411 ha impact area centrally located on West Range. The mean annual mortality rate was 0.50 for adults and yearlings combined. Fifty percent of all adult and yearling mortality was attributed to military training activities, 28% to hunting, 16% to collisions with automobiles, and 6% to unknown causes. The mean monthly mortality rate was 0.61 for neonatal fawns and predation accounted for three of four mortalities. All captured deer in the greater than or equal to 2.6-yr-old, 82% in the 1.6-yr-old, 10% in the 0.6-yr-old, and all deer in the less than 7-day-old age groups were seropositive for bluetongue virus (BTV). Our study strongly suggests that the consequences of military training activities should be considered in the management of white-tailed deer herds on military installations.

Animals↗
PubMed2006

Psychological and physical activity training for older persons: who does not attend?

BACKGROUND: Interventions to promote successful aging include psychological and physical activity programs. Identification of determinants of attendance of older persons may be useful to develop strategies to improve attendance. For physical activity programs determinants of attendance have been investigated extensively. For psychological programs hardly any knowledge is available. Determinants of attendance at psychological and physical activity programs have never been investigated simultaneously. OBJECTIVE: To identify demographic, physical and psychological determinants of attendance of older subjects following multifaceted psychological training - aimed at promoting active social participation - and physical activity training and to compare the variation of these determinants between the two training programs. METHOD: 118 subjects aged 65-92 years were randomized over psychological and physical activity training. Determinants of attendance were obtained at pretest with questionnaires and performance-based tests. RESULTS: Mean attendance was 62%. Attendance was not related to type of program. Having chronic diseases facilitated attendance in the psychological training group and limited attendance in the physical activity training group. Low and high levels of Activities of Daily Living performance (ADLs) and walking endurance were related to a high attendance in the psychological training group. A low level of activities of daily living (ADL) and a low walking endurance were related to a low attendance in the physical activity training group. For both training groups, persons living with a partner had higher attendance rates than persons living alone, and persons with a low level of anxiety had higher attendance rates than persons with a moderate or a high level of anxiety. CONCLUSION: Psychological training may be more suitable for frail older persons with chronic diseases, low ADL levels and low walking endurance than physical activity training, and may help to prepare such persons for physical activity.

Activities of Daily Living↗
PubMed2002

The effect of military training activity on eastern lupine and the Karner blue butterfly at Fort McCoy, Wisconsin, USA.

The US Department of Defense (DOD) manages over 10.1 million ha of land, much of which is used for training military personnel. However, vast sections receive little or no use, and military lands have become refuges for many species. At Fort McCoy, Wisconsin, USA, populations of the endangered Karner blue butterfly (Lycaeides melissa samuelis) are found in oak and pine barren communities where wild lupine (Lupinus perennis), a perennial forb required by Karner blue butterfly larvae, still occurs. Oak and pine barren communities are disturbance-dependent, and the barrens ecosystems in the Midwest have declined in extent by 98% because of fire suppression, succession, and habitat fragmentation. We studied the effects of disturbance by military manuever training on the density of lupine and Karner blue butterfly at Fort McCoy. We also wanted to determine whether military training activity could enhance Karner blue butterfly habitat. At locations where tracked vehicles had driven through lupine patches, the abundance of lupine and nectar-producing plants was greater in the median strip between vehicle ruts than in vehicle ruts or 5 m outside the vehicle ruts. The proportion of lupine stems with Karner blue butterfly larvae feeding sign (the ratio of stems fed upon to stems examined) was greater in areas where military vehicles had traveled than where they had not. The proportion of lupine stems with feeding sign and lupine stem density was also positively related to the occurrence of prior bivouacs and fires caused by military munitions. Shrub and forest canopy abundance were lower in areas traveled by tracked vehicles. At the scale of the lupine patch, lupine abundance and the proportion of lupine stems with feeding sign were positively correlated with military training activities, suggesting that maintenance of lupine habitat can be achieved in concert with military training.

Animals↗
PubMed1990

Functional and psychosocial consequences of disease and experience of pain and exertion in a group of rheumatic patients considered for active training. Result of a survey in Bollnäs Medical District. I.

The purpose of this study was to select and describe a group of RA patients within a defined area who had, on clinical grounds, been considered for active training. The material consisted of 69 patients with classical or definite RA. It comprised half of the RA patients known to the clinic. The patients were assessed by means of a questionnaire, functional tests with rating of activity-induced pain, a cycling-test with rating of perceived exertion, and an interview by a psychologist. Subjective disease consequences were pain and stiffness. 38% of the patients never or seldom exercised. 72% wished to increase their activity but were prevented by pain. The functional tests indicated slow performance and considerable pain in activities of daily life. The interview disclosed above all, a low degree of self-confidence. Generalized pain and functional impairment correlated slightly with psychosocial factors. The results of the study indicate the need for active training as one strategy to alleviate pain and to maintain functional capacity in RA patients.

Adaptation, Psychological↗
PubMed1996

Planned Activities Training for mothers of children with developmental disabilities. Community generalization and follow-up.

Planned Activities Training (PAT) teaches mothers to plan and structure activities to prevent challenging child behaviors. PAT was evaluated with four mothers of children with developmental disabilities, including autism, Down Syndrome, and ADHD. PAT was used independent of any other behavior management techniques to examine its impact on mother and child behaviors, which were examined in addition to "fidelity" data on the mothers' implementation of PAT techniques. A multiple probe experimental design across two families with a replication across two more families demonstrated that PAT produced marked improvements in mother and child behavior in three generalization settings. In most cases, mothers' use of PAT procedures more than doubled. Three mothers' appropriate behavior increased from 25% to 40%. Improvements in child behavior ranged from 20% to more than 50%. Intervention gains were maintained at 1, 3, and 6 months. These results suggest that PAT is a useful technique for promoting durable generalization of mother child skills.

Behavior Therapy↗
PubMed2001

Effects of alpha-tocopherol, beta-carotene and ascorbic acid on oxidative, hormonal and enzymatic exercise stress markers in habitual training activity of professional basketball players.

BACKGROUND: Intense physical exercise has been associated with an increase of free radical production. When the body's natural defense systems against free radicals are overwhelmed, oxidative stress increases. AIM OF THE STUDY: This study examined the effects of a vitamin antioxidant supplement, (composed of 600 mg alpha-tocopherol, 1000 mg ascorbic acid and 32 mg beta-carotene) on oxidative, hormonal, and enzymatic exercise stress markers during habitual training activity over 35 days. METHODS: The plasma concentrations of ascorbic acid, alpha-tocopherol, beta-carotene, testosterone, cortisol and lipid peroxides and the serum activities of lactate dehydrogenase and creatine kinase were measured at four time points: pre-supplementation (PS), pre-training (PT), after training (AT) and 24 h after training (24h-AT) in 13 professional basketball players of the first Spanish Basketball League (ACB). RESULTS: Antioxidant supplementation led to a significant increase of alpha-tocopherol and beta-carotene from PS to PT. Plasma lipid peroxides decreased about 27.7% after 35 days of antioxidant treatment. A significant decrease of lactate dehydrogenase serum activity was observed during the 24 h recuperation time. During this time the anabolic/catabolic balance increased about 29.8% in the antioxidant supplemented group, although this increase did not reach statistical significance. CONCLUSIONS: The results of the present study suggest that supplementation with alpha-tocopherol, beta-carotene and ascorbic acid might partially account for the hormonal and enzymatic stress marker profile observed during habitual training activity of professional basketball players.

Adult↗
PubMed2004

Comparison of training activities and game demands in the Australian Football League.

his paper serves as a companion to our recent study of the movement patterns and game activities of players (from five different positions) during matches in the 2000 Australian Football League season. Using lapsed-time video analysis, the same individual players (n= 11) as filmed in matches were also monitored during 21 in-season, main training sessions conducted by their clubs in order to assess the degree to which training activities matched game demands. In general, the training sessions did not involve physical pressure; therefore there were very few contested marks and ground balls or tackles, shepherds and spoils, thereby not matching these game demands. Players typically had more possessions (kicks and handballs) at training than in games. They also spent a greater percentage of total time standing and less time walking at training than in games. Fast-running and sprinting efforts at training were almost all for durations of <6 secs, which matched game demands, as did changes of direction when sprinting, which were almost all in a 0-90 degrees arc. However, across all players filmed, high intensity (fast-running and sprinting) movements were not performed as frequently at training (one every 76 secs) as in games (one every 51 secs). Therefore, while some game demands were adequately replicated at training, others were not closely simulated, suggesting that, after careful interpretation of these results, some improvements in training practices could be made.

Australia↗
PubMed1984

Criteria for excitation and inhibition in peristimulus spike train activity.

Five possibilities of defining a coefficient of facilitation and inhibition are described. It is shown that the application of these definitions to the same spike train activity eventually leads to considerably different results, e.g., a response which is inhibitory according to one definition sometimes is facilitatory according to another definition. To find the most reliable definition the theoretical differences between the five alternatives are examined, whereby a coefficient is considered reliable if it is reproducible and independent of external experimental parameters, such as the record length. As an experimental example spike trains were recorded from mitral cells in the olfactory bulb of the goldfish. We divide every response into two sections: an initial reaction and a steady state reaction. In this way each response can be uniquely classified. The most reliable definition of a coefficient of facilitation turns out to be based on the steady state levels of an averaged peristimulus time histogramme. Under certain conditions this corresponds to considering the means of the sample mean rates of a stochastic point process before and after the stimulus application, whereby the initial reactions are neglected. These should be classified by other methods and notions.

Animals↗