Impact of Gait and Diameter during Circular Exercise on Front Hoof Area, Vertical Force, and Pressure in Mature Horses

Circular exercise can be used at varying gaits and diameters to exercise horses, with repeated use anecdotally relating to increased lameness. This work sought to characterize mean area, mean vertical force, and mean pressure of the front hooves while exercising in a straight line at the walk and trot, and small (10-m diameter) and large circles (15-m diameter) at the walk, trot, and canter. Nine mature horses wore TekscanTM Hoof Sensors on their forelimbs adhered with a glue-on shoe. Statistical analysis was performed in SAS 9.4 with fixed effects of leg, gait, and exercise type (PROC GLIMMIX) and p < 0.05 as significant. For all exercise types, the walk had greater mean pressure than the trot (p < 0.01). At the walk, the straight line had greater mean area loaded than the large circle (p = 0.01), and both circle sizes had lower mean vertical force than the straight line (p = 0.003). During circular exercise at the canter, the outside front limb had greater mean area loaded than at the walk and trot (p = 0.001). This study found that gait is an important factor when evaluating circular exercise and should be considered when exercising horses to prevent injury.

Effects of Physical Exercise on Women with Disabilities in South Korea: A Meta-Analysis

This study is the first to conduct a comprehensive investigation of the effects of physical exercise on South Korean women with disabilities using the data of previous studies. This study performed a meta-analysis of the effect sizes of exercise programs for women with disabilities using Comprehensive Meta-Analysis 3.0 and a total of 16 papers with 154 participants. The largest effect sizes were found for changes in muscle strength (d = 2.407) for treatment effects, horseback riding (d = 3.080) for exercise type, 45–50 min (d = 3.080) for duration of a single exercise session, three times (d = 0.963) for frequency of exercise per week, 15 weeks (d = 1.974) for period of exercise and 45 times (d = 1.974) for total number of sessions. The results of this meta-analysis showed that exercise programs suitable for the individual-level characteristics of disabled individuals can and should be developed and implemented.

Physical Exercise as Treatment for PTSD: A Systematic Review and Meta-Analysis

ABSTRACT Introduction Post-traumatic stress disorder (PTSD) is a cluster of physical and psychiatric symptoms following military or civilian trauma. The effect of exercise on PTSD symptoms has previously been investigated in several studies. However, it has not been fully determined what type of exercise most impacts PTSD symptoms. The aim of the present study was to systematically review the effects of different types of exercise on PTSD symptom severity and symptoms of coexisting conditions in adults. Materials and Methods Electronic searches were conducted in the databases PubMed, APA PsycInfo, and SportDiscus, from database inception up until February 1, 2021. Inclusion criteria were randomized controlled trials published in English, participants having a PTSD diagnosis or clinically relevant symptoms, and participants randomly allocated to either a non-exercising control group or an exercise group. Data concerning the number of participants, age, exercise type and duration, PTSD symptom severity (primary outcome), and symptoms of coexisting conditions (secondary outcomes) were extracted. The subgroup analysis included high or low training dose, military trauma versus non-military trauma, the type of intervention (yoga versus other exercise), active or passive control condition, group training versus individual exercise, and study quality. The study quality and risk of bias were assessed using grading of recommendation assessment, development and evaluation (GRADE) guidelines. A meta-analysis was performed with a mixed-effects model and restricted maximum likelihood as model estimator, and effect size was calculated as the standardized difference in mean and 95% CI. Results Eleven studies were included in the present review. Results showed a main random effect of exercise intervention (0.46; 95% CI: 0.18 to 0.74) and a borderline significant interaction between more voluminous (&gt;20 hours in total) and less voluminous (≤20 hours in total) exercise interventions (P = .07). No significant findings from the subgroup analysis were reported. The secondary outcome analysis showed a small but significant effect of exercise on depressive symptoms (0.20, 95% CI: 0.01 to 0.38), and a larger effect on sleep (0.51, 95% CI: 0.29 to 0.73). For substance use (alcohol and drugs combined) and quality of life, we found significant effects of 0.52 (95% CI: 0.06 to 0.98) and 0.51 (95% CI: 0.34 to 0.69), respectively. No significant effect was found for anxiety (0.18, 95% CI: −0.15 to 0.51), and no sign of publication bias was found. Conclusions Exercise can be an effective addition to PTSD treatment, and greater amounts of exercise may provide more benefits. However, as there were no differences found between exercise type, possibly due to the inclusion of a low number of studies using different methodologies, further research should aim to investigate the optimal type, dose, and duration of activity that are most beneficial to persons with PTSD.

Relación entre el tipo de ejercicio físico y la fatiga cuantificada mediante VFC, CK y el lactato en sangre (Relationship between physical exercise type and fatigue quantified through HRV, CK, and blood lactate)

Los atletas son expuestos a cargas de alta intensidad en la búsqueda del rendimiento deportivo, sin embargo, sus efectos no se evalúan apropiadamente. El presente estudio analiza los efectos de cuatro diferentes tipos de ejercicios sobre la variabilidad de la frecuencia cardíaca (VFC), diagrama de Poincaré (SD1: desviación estándar 1 y SD2: desviación estándar 2), así como la Creatina Cinasa (CK) y las concentraciones de lactato en sangre como marcadores de fatiga. Para lograr el objetivo, participaron 10 voluntarios sanos quienes se expusieron a fatiga mediante protocolos de ejercicio isotónicos, isométricos, aeróbicos y anaeróbicos. Se tomaron muestras de la SD1 y de la SD2 para posteriormente probar el comportamiento de la fatiga mediante el índice de estrés (SS) como parámetro simpático, y el índice simpático/parasimpático (S/PS), además se midió la raíz cuadrada media de las diferencias sucesivas (rMSSD) como indicadores parasimpáticos. Se recolectaron muestras sanguíneas al comienzo y al final de cada uno de los tipos de ejercicio para determinar los niveles de CK y lactato. La SD1 disminuye en cada protocolo de ejercicio, mientras que el SS y el S/PS incrementan. Lactato y CK incrementan al final de cada protocolo y correlacionan positivamente con el SD1 y S/PS. La VFC, CK y lactato son marcadores sensibles para la detección de fatiga, son sensibles tanto al tipo, duración e intensidad del ejercicio, siendo la VFC un marcador no invasivo y novedoso, simple y útil para los entrenadores y atletas. Abstract: Athletes are exposed to high-intensity loads to promote athletic performance, however, the effects are not evaluated appropriately. This study investigates the effects of four types of exhaustion exercises on Heart Rate Variability (HRV) and Poincaré features (SD1: Standard deviation 1and SD2: Standard deviation 2), Creatine Kinase (CK) and blood lactate concentrations as biomarkers of fatigue. To achieve this purpose, 10 healthy volunteers were exposed to exhaustive exercise using isotonic, isometric, aerobic and anaerobic fatigue protocols. HRV Poincaré features, standard deviation of instantaneous beat-to-beat R-R interval variability (SD1) and standard deviation of continuous long-term R-R interval variability (SD2) variables were collected. Fatigue was tested through the sympathetic stress index (SS), the index sympathetic/parasympathetic index (S/PS) and the root Mean Square of the Successive Differences (rMSSD) as parasympathetic index. Blood samples were collected at the beginning and at the end of the exercises to determine CK and lactate. The SD1 decreased in each exercise protocol, while the SS and S/PS increased. Lactate and CK increased at the end of each protocol and correlated with SD1 and S/PS. HRV, CK, and lactate are acute markers to detect fatigue, are sensitive to the type, duration, and intensity of exercise, being HRV a novel noninvasive marker, simple and useful for sports coaches and athletes.

Physical activity influences the mobile phone addiction among Chinese undergraduates: The moderating effect of exercise type

Background and aimsMobile phone addiction (MPA) has recently aroused much attention due to its high incidence and considerable health hazards. Although some existing studies have documented that physical activity is negatively associated with MPA, it is little known about the potential effects underlying this relation. The aim of this study was to investigate the relationship between physical activity and MPA among undergraduates in China, and to further examine the moderating effect of exercise type in the relation between them.MethodsBy the quota sampling, a total of 650 participants engaged in this survey and completed relevant measurements including physical activity rating scale-3 (PARS-3) and mobile phone addiction tendency scale (MPATS).ResultsGender (β = 0.271, P < 0.05) and major (β = −0.169, P < 0.05) could significantly predict MPA, respectively, and physical activity was an imperative protective factor to decrease MPA (β = −0.266, P < 0.001). While the physical activity level enhanced from none exercise to medium exercise, an optimum dose-response relationship would emerge between physical activity and MPA (F(3,604) = 4.799, P < 0.01). Most important, the relation between physical activity and MPA can be moderated by exercise type. Especially in terms of aerobic endurance exercise, the higher level of physical activity the undergraduates performed, the lower degree of MPA would be suffered by them (β = −0.266, P < 0.001).DiscussionThese findings could be conducive to better understand the positive and potential effects of physical activity on the intervention in MPA, and served as a persuasive evidence that as for university students, actively engaging in aerobic endurance exercise with the medium activity level would be a practicable exercise strategy to deal with MPA in daily lifestyle behavior.