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Search Results: 1 - 10 of 3230 matches for " exercise "
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Fourier and Wavelet Spectral Analysis of EMG Signals in 1-km Cycling Time-Trial  [PDF]
Marcelo Bigliassi, Paulo Rogério Scalassara, Thiago Ferreira Dias Kanthack, Taufik Abr?o, Antonio Carlos de Moraes, Leandro Ricardo Altimari
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.513181
Abstract: Frequency domain analyses in electromyographic (EMG) signals are frequently applied to assess muscle fatigue and similar variables. Moreover, Fourier-based approaches are typically used for investigating these procedures. Nonetheless, Fourier analysis assumes the signal as stationary which is unlikely during dynamic contractions. As an alternative method, wavelet-based treatments do not assume this pattern and may be considered as more appropriate for joint time-frequency domain analysis. Based on the previous statements, the purpose of the present study was to compare the application of Short-Time Fourier Transform (STFT) and Continuous Wavelet Transform (CWT) to assess muscle fatigue in dynamic exercise of a 1-km of cycling (time-trial condition). The results of this study indicated that CWT and STFT analyses have provided similar fatigue estimates (slope) (p> 0.05). However, CWT application represents lesser dispersion (p< 0.05) for vastus medialis (189.9 ± 82.1 for STFT vs 148.6 ± 60.2 for CWT) and vastus lateralis (151.6 ± 49.6 for STFT vs 103.5 ± 27.9 for CWT). In conclusion, despite the EMG signal did not change (p> 0.05) according to different methods, it is important to note that these responses seem to show greater values for CWT compared to STFT for 2 superficial muscles. Thereby, we are capable of considering CWT as a reliable and useful method to take into consideration when non-stationary or oscillating exercise models are evaluated.
Falls and Physical Performance among Frail Sexagenarians and Septuagenarians  [PDF]
Ganesan Kathiresan, Sandra Devie, Sunnelly Velintina, Stellah Lenson, Nur Idawanny, Nur Asyikin, Nurul Hijah
International Journal of Clinical Medicine (IJCM) , 2010, DOI: 10.4236/ijcm.2010.11004
Abstract: Background: In Malaysia, there are few populationbased studies on the factors associated with falls, and there is a lack of prevention of falls among older adults in primary and secondary health care, particularly in terms of physical activity that could improve the physical performance of individuals at risk of falling. Therefore, the objective of the present study was to determine the relationship between physical performance, the number of falls and the sociodemographic, physical, clinical and functional characteristics of older adult fallers. Methods: Crosssectional study carried out among 72 older adults with a history of falls in the past year, 65.3% of which were women. The participants received care at the geriatric outpatient clinic and divided into the following groups: worst physical performance (WPP) and best physical performance (BPP), onetime fallers (1F) and frequent fallers (2F). Sociodemographic, clinical, physical and functional characteristics were considered as independent variables. Comparison analysis between the groups was conducted. Results: The WPP group was older and had a higher number of illnesses and less independence in most motor dimension tasks compared to the BPP group. The 2F group had a higher number of illnesses, less handgrip strength and less independence in the bowel management task in the motor dimension of the Functional Independence Measure (FIM) compared to the 1F group. Conclusions: Among older adults fallers, poor physical performance is associated with more advanced age, more illnesses and less functional independence. Moreover, recurrent falls are associated with more illnesses, less muscle strength and less functional independence in the bowel management task.
Epidemiology of exercise-related injuries among children  [PDF]
Ches Jones, Bart Hammig
Health (Health) , 2012, DOI: 10.4236/health.2012.49098
Abstract: The objective of this study was to describe the epidemiology of injuries from exercise not involving equipment among children 18 and under. Methods included a retrospective review of data for children birth to 18 years old from the National Electronic Injury Surveillance (NEISS) system of the US consumer Product Safety Commission for the years 2005-2009. A total of 5093 cases were identified and would result in an estimated 175,000 injuries in the US. The most common type of injury was a sprain/strain to the ankle (20%). Four out of five injuries were among children between 10 and 18. Injuries occurring at school accounted for 40% of the injuries. Exercise-related injuries are common among older children and often occur in schools or recreational environments but are usually minor. School officials and athletic personnel should make efforts to provide proper instruction on exercise activities and have resources to provide emergency care for injuries.
Pilot study provides qualitative evidence for intrinsic motivation in schizophrenia spectrum disorders  [PDF]
Marian W. Roman, Lora Humphrey Beebe, Renee Burk
Open Journal of Psychiatry (OJPsych) , 2012, DOI: 10.4236/ojpsych.2012.224045
Abstract: Persons with schizophrenia spectrum disorders (SSDs) face multiple health barriers that are improved with exercise, but they seldom exercise due to a variety of barriers, of which amotivation is primary. In the current study, we investigated the subjective experiences of persons with SSDs following a formal exercise program. Twenty seven persons with SSDs who had taken part in a 16-week walking program provided feedback during exit interviews. Our purpose was to ascertain whether comments provided evidence of development of intrinsic motivation as defined by Ryan and Deci’s self determination of behavior theory. Our directed content analysis resulted in 5 thematic codes: autonomy, competence, relatedness, health benefits and personal enjoyment. Results highlight the importance of health-related group activities in supporting competence, relatedness and autonomy. Development and testing of interventions to support intrinsic motivation is critical to improving the health of this vulnerable group.
Aerobic exercise program on blood lipids in women between 40 and 55 years old  [PDF]
Judith M. Rodríguez-Villalobos, María de Jesús Mu?oz-Daw, Rosa P. Hernández, Martha Ornelas
Health (Health) , 2013, DOI: 10.4236/health.2013.58167

Objective: Evaluate the effect of a physical activity program on the blood lipid profile in women between 40 and 55 years old. Methods: 7 female participants from the city of Chihuahua, Chihuahua, Mexico, on a program of moderateintensity physical activity lasting 4 months, evaluated before and after the implementation of the program in the variables of total cholesterol, triglycerides, LDL and HDL, as well as the atherogenic index and cardiovascular risk. Data were analyzed with Student t test for related samples with a significance level of 0.05. Results: Total cholesterol levels and LDL in samples collected after physical exercise program decreased significantly compared to those collected before the implementation of the exercise program, while statistically, HDL and triglycerides did not show significant changes. The atherogenic index and cardiovascular risk showed positive trends, thus favoring that moderate intensity aerobic exercise decreased cardiovascular risk in women reaching the perimenopause period.

FRAX and Exercise: Should Exercise Be Categorized as a Risk Factor in Osteoporotic Patients  [PDF]
Akira Horikawa, Naohisa Miyakoshi, Yoichi Shimada, Hiroyuki Kodama
Open Journal of Orthopedics (OJO) , 2013, DOI: 10.4236/ojo.2013.32025

Although FRAX (WHO Fracture Risk assessment Tool), developed by the WHO, is a well-validated tool for determining the probability of a major osteoporotic fracture in the next 10 years, it doesn’t include a number of other impact factors such as exercise and nutrition. The purpose of this study was to compare the differences in FRAX between subjects with and without exercise habits or intake of calcium/coffee. A significant difference in FRAX was observed between the groups with respect to exercise (p < 0.001). There were no significant differences in FRAX, however, between the groups with and without intake of calcium/coffee. Although exercise habits are not included in FRAX, our findings suggest that exercise status influenced other factors included in FRAX. Since exercise is reported to prevent falls and fall-related osteoporotic fractures, including exercise status in FRAX may be more effective for estimating the possibility of future fractures. Further investigation should be conducted to determine whether exercise status is an important risk factor, independent of FRAX, for osteoporotic fractures.

Exercise and menstrual function: A review study  [PDF]
Sikiru Lamina, Charles Ikechukwu Ezema, Uche A. Ezugwu, Augustine A. Amaeze, Maduabuchukwu Joseph Nwankwo, Amaeze Florence Ngozi
Health (Health) , 2013, DOI: 10.4236/health.2013.512272

At present there is no conclusive evidence that participation in exercise affects menstruation and is equivocal and unclear whether menstrualtion affects athletic performance. An attempt has therefore been made in this paper to discuss the effects of menstruation on exercise performance and vice versa. The paper reviewed that women experiencing pre-menstrual syndrome will not likely perform well and that menstrual irregularity is much higher in athletes than sedentary women. The paper also reviewed that athletes reach menarche later than sedentary sisters. The review concluded that competing women experiencing premenstrual syndrome might get control over their menstruation through medically recommended low dose oral contraceptive. The paper recommended that athletes experiencing menstrual irregularities and disturbances should seek medical consultation and management before further training.

Relationship between Menopausal Sweating and Body Mass Index  [PDF]
Emmanuel Amabebe, Sonia I. Osayande, Janet O. Ozoene, Andrew C. Ugwu
Open Journal of Endocrine and Metabolic Diseases (OJEMD) , 2014, DOI: 10.4236/ojemd.2014.46014

We sought to examine the relationship between BMI, sweat rate (SR) and sweat volume (SV) in pre-, peri- and postmenopausal women during a moderate exercise. Based on their ages and menstrual cycle history, thirty healthy women were divided into three groups: pre- (22.5 ± 0.8 yrs, n = 10), peri- (46.5 ± 1.1 yrs, n = 10) and post- (52.2 ± 0.9 yrs, n = 10). Participants underwent a 15- minute walk on a treadmill at a constant speed of 4.2 km/h at 27°C. Sweat was collected and measured with a suction apparatus around a confined area of 120 cm2 outlined on the skin of the face and neck of the participants during the exercise. SR and BMI were determined using the formulae: \"\" \"\" and   \"\" , respectively. The older women had a significantly higher BMI: pre-, peri- and post- (23.7 ± 1.3 kg/m2 vs 28.0 ± 1.2 kg/m2 vs 28.4 ± 0.7) (p < 0.05). Although there was no significant

Health-Related Physical Fitness in Female Models  [PDF]
Salime Donida Chedid Lisboa, Rodrigo Sudatti Delevatti, Ana Carolina Kanitz, Thais Reichert, Cláudia Gomes Bracht, Alexandra Ferreira Vieira, Luiz Fernando Martins Kruel
Health (Health) , 2016, DOI: 10.4236/health.2016.82019
Abstract: The model profession uses the appearance for the representation of products and brands via events. For some individuals that are included in this medium, plus a laboral activity, modeling becomes a lifestyle, the search for the status and work opportunities turn a dream for a thousands of children and teenagers because the profession has particulars experiences. To win this, many girls change physical and eating behaviors which are harmful to health. The objective of this study was to analyze the health-related physical fitness in female models comparing them with non-models. The study was conducted at the Caxias do Sul, Rio Grande do Sul, Brazil. Participated of the study female runway and commercial models bokered in Cast One Models, with age between 15 - 25 years old. The non-models were students from public and private schools or university students. The health-related physical fitness, the physical activity levels and dietary intake were assessed of all participants. The data were described as mean and standard deviation. For comparison between models and non-models was used t independent test for variables normally distributed and U Mann-Whitney test for not normally distributed variables, adopting a level of significance (α) of 0.05. It was found difference in total energy between model group and non-model (GM: 1509.78 kcal, NM: 2292.51 Kcal; p = 0.014). There were no differences between groups in the others variables analyzed (p > 0.05). In conclusion, the profession model seems not interfere in variables that make up the health-related physical fitness.
Managing Exercise Induced Anaphylaxis in Labour  [PDF]
Mazhar Chaudry, Ciara Mckay
Open Journal of Obstetrics and Gynecology (OJOG) , 2016, DOI: 10.4236/ojog.2016.66044
Abstract: Exercise induced anaphylaxis is an uncommon condition first reported by Sheffer and Austen in 1980. In this condition there is an exercise-induced lowering of the mast cell degranulation threshold, causing release of histamine and other mediators leading to the progression of symptoms of anaphylaxis. These can range from mild cutaneous pruritis and urticaria to severe systemic manifestations such as hypotension, cardiovascular collapse, syncope and even death. In Pregnancy and Labour, this can result in a number of complications and challenges. We will describe a case we were involved with.
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