Accuracy of reproduction of physical training load is not associated with resting heartbeat perception in healthy individuals

2020 ◽  
Vol 150 ◽  
pp. 107831 ◽  
Author(s):  
Ferenc Köteles ◽  
Ivett Éliás ◽  
Zsuzsanna Szabolcs ◽  
János Körmendi ◽  
Eszter Ferentzi ◽  
...  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryan Smith ◽  
◽  
Justin S. Feinstein ◽  
Rayus Kuplicki ◽  
Katherine L. Forthman ◽  
...  

AbstractThis study employed a series of heartbeat perception tasks to assess the hypothesis that cardiac interoceptive processing in individuals with depression/anxiety (N = 221), and substance use disorders (N = 136) is less flexible than that of healthy individuals (N = 53) in the context of physiological perturbation. Cardiac interoception was assessed via heartbeat tapping when: (1) guessing was allowed; (2) guessing was not allowed; and (3) experiencing an interoceptive perturbation (inspiratory breath hold) expected to amplify cardiac sensation. Healthy participants showed performance improvements across the three conditions, whereas those with depression/anxiety and/or substance use disorder showed minimal improvement. Machine learning analyses suggested that individual differences in these improvements were negatively related to anxiety sensitivity, but explained relatively little variance in performance. These results reveal a perceptual insensitivity to the modulation of interoceptive signals that was evident across several common psychiatric disorders, suggesting that interoceptive deficits in the realm of psychopathology manifest most prominently during states of homeostatic perturbation.


2018 ◽  
Vol 1 (5) ◽  
Author(s):  
Yingqiu Zhang ◽  
Xingdong Zhou

  Objective Using the theory of sports biochemistry, we can better complete the formulation of the training plan, the evaluations of training effect and the athlete's fatigue status, the real-time monitoring of training intensity and training amount as well as the function level of athletes and the comprehensive evaluation of nutritional status. To provide some theoretical guidance for the daily training of Chinese hearing-impaired table tennis team and to gradually establish the biochemical monitoring model for the Chinese Deaf Table tennis team, this subject has applied biochemical index monitoring to this team. Methods 2.1 Research Object 8 Athletes (male 4 female 4) of the Chinese hearing-impaired table tennis team were studied. The average height, weight, and age were 174.3±5.1cm, 65.4±11.6kg, 23.5±4.9 years respectively.2.2 Research Methods 2.2.1 Literature To find out the energy-supplying and metabolic characteristics of table tennis as well as the modes to accelerate the recovery period of body fatigue, we have searched a variety of literature on this purpose. The investigation of athletes' nutrition regulation, physical training and rehabilitation and other related research results lays a good foundation for the implementation of the project. 2.2.2 Expert Interview This paper discusses the energy metabolism characteristics of the hearing-impaired table tennis players by discussing with the coaches, athletes and experts and scholars of the national Hearing Impairment project group. The evaluation index and standard of athlete's body function, the method of training load monitoring, the way of nutrition regulation, the means of fatigue recovery and the process of physical training were discussed. 3.2.3 Field Investigation From April, 20th, 2017 to July, 10th, 2017, two researchers have long been in the center of national table tennis training located at Zheng Ding, Hebei province, to complete training monitoring and research services. Results 3 Research Results Phlebotomizing 7 of the Chinese hearing-impaired table tennis players in June,2nd,2017 and June 7th, 2017 respectively, The blood samples were analyzed by the team of experts and researchers in the Sports Physiology and Biochemistry Laboratory in Beijing Sport University. Part of the results was shown below in table 1, table 2. (1) Training intensity monitoring Huang Mengping had a slightly higher creatine kinase, a slight decrease in testosterone, a slight rise in cortisol, a lower testosterone/cortisol value, as well as an insignificant reduction in body function than the previous time. She should focus on the recovery of her body condition after training. In general, the testosterone, cortisol and testosterone/cortisol level in this team is slightly higher than the last time, blood urea lower than the previous. Strengthening the monitoring of exercise and nutrition and continuing to maintain a high body synthesis ability are favorable to intense competition. The overall creatinine level decreased, whereas 4 members of the team had insignificantly high creatinine, especially for Huang Mengping who first had appeared high level of it. Although this condition was not too severe to focus on, we should strengthen the regulation of athlete muscle injury and protect their kidney functions. (2) Monitoring of endocrine system indicators Both males and females had higher testosterone synthesis capabilities. They should continue to take the nutritional supplements. The T/C ratio of Tian Jiping has escalated sharply, but it was lower than that of other players. We should pay attention to his training load and promote the recovery training. (3) Monitoring of Iron Metabolic Index Huang Mengping's hemoglobin value and RBC value have been slightly elevated this time. It is suggested that she should keep on to take nutritional supplements and strengthen aerobic endurance training. Hemoglobin for Wang Zhe and Lin Huan (slightly decreased this time) was higher than their counterparts. The ability to transport oxygen was excellent, and it is agreeable to keep on. They need to continue to maintain and promote the body's oxygen reserve capacity. At the same time, they can also upgrade their overall red blood cell levels. Men have seen a high level of hemoglobin and the number of red blood cells as well as robust capabilities of oxymoron reservation and transportation. It is recommended to enhance aerobic endurance training, mainly improving the aerobic capacity. The serum iron of Tian Jiping was promoted quickly. He needs to build up the amount of iron nutrient intake and support the body synthesis. The full iron metabolic indicators were normal, but Zhang Chaoyue and Lin Lin Huan have been seen the lack of the abilities to synthesis iron. So we need to pay attention to iron metabolism-related nutrition intake. In general, iron protein level and the capability to reserve iron have declined. It is recommended to take more iron nutrients, Especially for Shi Ce. (4) Food surveillance After the diet regulation, the indicators for the team's blood fat were within the normal range. Zhang Chaoyue and Wang Zhe should control the high-fat food intake, thus reducing the amount of low-density lipoprotein. (5) Surveillance of immune Indicators The white cell, blood cell classification and immunoglobulin (IgG, IgM, IgA) of the team are all normal, Wang Zhe’s immunoglobulin A and Xu You’s immunoglobulin M are slightly low, we should pay attention to protection. Conclusions  Through the overall monitoring and analysis of the biochemical indexes of the leading athletes of Chinese hearing-impaired table tennis team, The characteristics of biochemical indexes of the high-level hearing-impaired table tennis players are mastered. On the basis of the overall characteristics of the individual, we carried out personalized monitoring and evaluation to give coaches and athletes advice on training, rehabilitation and other aspects related to practice. Biochemical tracking in China's hearing-impaired table tennis team has achieved an excellent application results that have been unanimously recognized by the coaches and athletes.  


2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Yuncai Fan ◽  
Qi Yan

Objective To explore the usage of heart rate and derivative index, such as quick recovery index (QRI) and training impulse (TRIMP), to monitor and evaluate load level at physical training course. With simplified load evaluation program, we can accurately feedback load stress and recovery conditions of the athletes, so as to timely adjust training load and avoid sports fatigue. Methods Maximum oxygen uptake is tested to determine maximum heart rate of the athletes, which can be used as the basis for monitoring assessment of physical training load. During training phase, monitoring the variation of the relative index of HR and sleeping conditions of 10 athletes by Firstbeat. The test means was High-intensity interval endurance of climbing machine in 7*20s-20s before and after stage training. The main indexes include of QRI/TRIMP/EPOC/BLa\climbing height.  Results It’s shown through monitoring that maximum heart rate of the athletes in the physical training course is up to 200BPM, which prompts high load level during training. Such athletic ability is promoted to satisfy the demands for complex choreography. Characteristics of energy supply for power endurance with high intensity closely agree with physical fitness demand during synchronized swimming competition, which is general performance of strength, speed and endurance. Through comparison of data on testing power endurance of climbing machine in 7*20s-20S before and after training, average climbing height of the athletes is increased from 60.1m/20s to 62.4m/20s with increased range up to 3.8% and blood lactate level is decreased from 10.7mmol/L to 10.5mmol/L in 2 minutes after exercise, which can be regarded as slightly improvement of ability of the athletes for lactate decomposition and fatigue relief, and aerobic capacity of the athletes are improved to a certain degree. After training, heart rate QRI and TRIMP of the athletes are improved slightly. Among them, QRI is significantly improved from 19.6% to 21.6% after stage training, which shows slightly improvement of training quality and recovery capability of the athletes, i.e. adaptive capacity to training load; After physical training, research on monitoring QRI of the athletes during arrangement and relaxation shows that maximum heart rate level without voice guidance is 75.1bpm,which is higher than those with voice guidance 72.9bmp after 5-min quick recovery; QRI of the athletes is 31.9% when voice is used to guide relaxation, which is significantly higher than those without relaxation under voice guidance (QRI is 27.0%); night pressure monitoring unit (BodyGuard2) of Firstbeat is used to monitor sleeping conditions of the athletes. In the initial stage of heavy load training cycle, training load enables athletes to produce a strong stress response, which causes relatively poor sleeping and recovery conditions; with gradual adaptation of the athletes to the training load, in the middle and later stages of the cycle, stress response of the athletes during sleeping almost disappears, and their sleeping quality and recovery conditions are improved significantly.  Conclusions Through Power endurance training, lactate elimination capacity of the athletes, i.e. anti-fatigue capacity and quick recovery capability are improved; during quick recovery of the athletes, voice guidance can be used to effectively promote quick recovery of the athletes. Exercise heart rate, TRIMP and QRI can be used to perceptually and rapidly monitor completion of physical training load in a real-time way, Objective to evaluate recovery and sleeping conditions of the athletes, and effectively evaluate high-intensity interval physical training load and training effect.


Author(s):  
Horta Thiago A.G. ◽  
Filho Maurício G. Bara ◽  
Miloski Bernardo ◽  
Freitas Daniel G.S. de ◽  
Vianna Jeferson M.

2020 ◽  
Author(s):  
Ryan Smith ◽  
Justin Feinstein ◽  
Rayus Kuplicki ◽  
Katherine Lynne Forthman ◽  
Jennifer Stewart ◽  
...  

This study employed a series of heartbeat perception tasks to assess the hypothesis that cardiac interoceptive processing in individuals with depression/anxiety (N=221), and substance use disorders (N=136) is less flexible than that of healthy individuals (N=53) in the context of physiological perturbation. Cardiac interoception was assessed via heartbeat tapping when: (1) guessing was allowed; (2) guessing was not allowed; and (3) experiencing an interoceptive perturbation (inspiratory breath hold) expected to amplify cardiac sensation. Healthy participants showed performance improvements across the three conditions, whereas those with depression/anxiety, and substance use showed minimal improvement. Machine learning analyses suggested that individual differences in these improvements were negatively related to anxiety sensitivity, but explained relatively little variance in performance. These results reveal a perceptual insensitivity to the modulation of interoceptive signals that was evident across several common psychiatric disorders, suggesting that interoceptive deficits in the realm of psychopathology manifest most prominently during states of homeostatic perturbation.


2018 ◽  
Vol 1 (5) ◽  
Author(s):  
Chong Chen ◽  
Mingbo Wang

Objective Research purpose: This research aims at giving an comprehensive summary of the current situation of physical training of Chinese ice hockey team and helps to grasping the key points of their physical training, innovating the specific training methods, and improving the competitive performance of sports teams. Methods Research methods: “Literature research” is the main method of this research. The authors have consulted CNKI, WWW, Wiper net, Knowledge Base of Sports Resources, EBSCO host and some other databases and analyzed 45 valuable articles in total. Results Research result: The research results can be analyzed from three aspects--physical stamina requirement of players, training theories or methods, and physical fitness evaluation of players. 1 Physical stamina requirement of players Ice hockey is an aperiodic sport with a repeated alternately of high, medium and low intensity, which is characterized by intermittent high intensity exercise and high antagonism. The sports’ mode is 70: 2: 30, which means players have 70 seconds to play and two minutes to rest each time, and the whole match will take 30 minutes. The blood urea, creatine kinase and serum testosterone of players will significantly change after the competition. Most of their heart rate will be above 70 percent of the maximum rate and some athletes’ blood lactic acid value will reach to 17.1 mmol / L. Therefore physical stamina training is necessary for them. 2 Training theories or methods 2.1 Characteristics of physical training load and periodicity Athletes’ physical training presents periodic changes. Specifically, their competitive state presents a pattern of formation, maintenance and temporarily fading with the change of training load. According to the theory of cycle and the principle of competitive sports training, some domestic researchers have established an annual cyclical training structure for the national women hockey team, and have achieved ideal results in practice. The annual cyclical training structure consists of 5 levels, 3 periods, 7 phases, 9 middle cycles and several different types of small cycles. In preparation for the 21st Vancouver Winter Olympics, the national women hockey team have accepted 482.5 hours physical training , accounting for 47 percent of the total training volume. 2.2 Strength quality The special strength of ice hockey consists of maximum strength, speed strength and endurance strength. Both land and ice strength training  are included, which have their own advantages and disadvantages. During the preparation period, Canadian fast strength training method, which is a kind of land strength training, can be used in general strength training stage, and the combination of land and ice training methods can be adopted in special strength training stage. And the method of simulating competition scene with the combination of special tactics is usually needed for the purpose of developing special strength. Step compression, impact exercise, waist load and skate weighting can effectively enhance the special strength while hooting strength requires special training methods. 2.3 Speed quality The speed of ice hockey include “simple and complex reaction speed”, “thinking process speed”, “starting speed”, “paragraph speed”, “fast braking of action”, “fast completion of technical action and convergence speed of action”. Therefore speed training should strictly control the training mode, frequency, interval time, and the stability of speed and the mechanism of energy metabolism system should be considered firstly. The usually methods are: repeated training, speed changing training, race and game training. 2.4 Endurance quality The endurance quality of hockey athletes consists of general endurance and special endurance quality. The general endurance training mainly needs aerobic methods, while the specific endurance training includes aerobic and anaerobic mixed training, anaerobic phosphate training and anaerobic glycolysis training. Endurance training is carried out at all stages of the season and both ice training and land training are needed. Methods of developing general endurance include uniform running, intermittent running, fartleke running, swimming and ball games. 3 Assessment and diagnostic methods of ice hockey player The physical fitness of athletes is mainly monitored by testing method, which mainly tests general physical fitness and special physical fitness, and such tests are carried out at different stages. There are also researchers on the physical characteristics of athletes in aspects of the body shape, function and quality . Conclusions  Research conclusion:The purpose of ice hockey physical training is to improve sports performance, enhance energy supply ability of metabolic system, and reduce injury. Such training should accord with its special characteristics and adopt the periodic training structure arrangement. And also should focus on the strength, speed, endurance, reasonable proportion of training arrangement on ice and land. The current physical fitness evaluation which includes general and special physical fitness still needs further study.


2021 ◽  
Vol 11 ◽  
Author(s):  
Raquel Suelen Brito da Silva ◽  
Darlene Camati Persuhn ◽  
Francisca Karinny Lemos Barbosa ◽  
Marizângela Ferreira de Souza ◽  
Klécia de Farias Sena ◽  
...  

This study aimed to verify the association between the genotypic of the receptor gene activated by peroxisome proliferators gamma 2 (PPARy2) and the body composition and the specific indicators of adiposity in practitioners physical exercises, considering nutritional intake, age, and training load as influencing factors. It was conducted a cross-sectional study with 335 adults (47.9 ± 12.7 years, 138 men, body mass index/BMI = 27.0 ± 4.9 kg/m2), practitioners of aerobic exercises in cyclical modalities (running, walking and/or cycling, who spent 328.3 ± 193.6 kcal/day on physical training). The genotyping of the Pro12Ala polymorphism was performed using the PCR-RFLP technique and the body composition measured by bioimpedance (InBody 720). Energy expenditure was based on the compendium of physical activities and caloric intake was measured by 24 h recall questionnaire. The higher prevalence was for the Pro/Pro genotype (76.1% vs. 23.9% of Pro/Ala). Pro/Pro genotypic group showed significant higher mean values for body mass (BM) (p < 0.03 for men and p < 0.02 for women) and BMI (p < 0.00 for men and p < 0.02 for women) and %FAT (p < 0.00), waist-hip ratio (WHR) (p < 0.04), and visceral fat (VF) (p < 0.00) only in men compared to Pro/Ala. Higher frequency of Pro/Pro was observed in the category indicating BMI (p < 0.00 for men and p < 0.03 for women), WRH (p < 0.03 for men and p < 0.00 for women), and %FAT (p < 0.03) (in the latter case, only among men. It was also observed that the frequency of distribution of Pro/Ala in the eutrophic category of the BMI remained independent of all influencers, while WHR and %FAT were independent of the training load, but influenced by nutritional intake and age. In women, the frequency of Pro/Ala distribution at the lowest BMI and WHR values remained independent of all confounding variables. It is concluded that the Pro12Ala polymorphism in the PPARy2 gene consistently influences indicators of body composition and adiposity, regardless of the practitioners of physical training, but the relationship needs to be considered according to age and nutritional intake.


Author(s):  
B. J. Panessa-Warren ◽  
J. B. Warren ◽  
H. W. Kraner

Our previous studies have demonstrated that abnormally high amounts of calcium (Ca) and zinc (Zn) can be accumulated in human retina-choroid under pathological conditions and that barium (Ba), which was not detected in the eyes of healthy individuals, is deposited in the retina pigment epithelium (RPE), and to a lesser extent in the sensory retina and iris. In an attempt to understand how these cations can be accumulated in the vertebrate eye, a morphological and microanalytical study of the uptake and loss of specific cations (K, Ca,Ba,Zn) was undertaken with incubated Rana catesbiana isolated retina and RPE preparations. Large frogs (650-800 gms) were dark adapted, guillotined and their eyes enucleated in deep ruby light. The eyes were hemisected behind the ora serrata and the anterior portion of the eye removed. The eyecup was bisected along the plane of the optic disc and the two segments of retina peeled away from the RPE and incubated.


1968 ◽  
Vol 11 (4) ◽  
pp. 767-776 ◽  
Author(s):  
B. Don Franks ◽  
Elizabeth B. Franks

Eight college students enrolled in group therapy for stuttering were divided into two equal groups for 20 weeks. The training group supplemented therapy with endurance running and calisthenics three days per week. The subjects were tested prior to and at the conclusion of the training on a battery of stuttering tests and cardiovascular measures taken at rest, after stuttering, and after submaximal exercise. There were no significant differences (0.05 level) prior to training. At the conclusion of training, the training group was significandy better in cardiovascular response to exercise and stuttering. Although physical training did not significantly aid the reduction of stuttering as measured in this study, training did cause an increased ability to adapt physiologically to physical stress and to the stress of stuttering.


2003 ◽  
Vol 84 (5) ◽  
pp. 687-690 ◽  
Author(s):  
Jens Kelm ◽  
Frank Ahlhelm ◽  
Peter Wei[szlig ]enbach ◽  
Philipp Schliesing ◽  
Thilo Regitz ◽  
...  
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