Farklı Frekanslarda Uygulanan Akut Tüm Vücut Titreşiminin Tekrarlı Sprint Performansına Etkisi

Bu çalışmanın amacı farklı frekanslarda uygulanan akut tüm vücut titreşiminin tekrarlı sprint performansına etkisinin belirlemektir. Bu amaç doğrultusunda sağlıklı 15 Spor Bilimleri Bölümü öğrencisi (Yaş: 23.52±2.45 yıl, Boy: 177.85± 5.82 cm, VA: 76.55±5.32 kg) çalışmaya gönüllü olarak katılmıştır. Katılımcılar tekrarlı sprint testine rastgele olarak; titreşim uygulaması yapılmadan, 30 Hz ve 40 Hz frekans ve 4 mm genlikte uygulanan tüm vücut titreşimi uygulamasının ardından katılmışlardır. Tüm vücut titreşimi uygulaması 60 sn olarak yarım skuat posizyonunda uygulanırken, 60 saniyelik pasif dinlenmenin ardından katılımcılar 20 saniye dinlenme aralıklarıyla uygulanan 12x20 m tekrarlı sprint testine katılmışlardır. Tekrarlı sprint testi sonucunda katılımcıların 0-10 m, 10-20 m, 0-20 m mesafeleri için en iyi sprint zamanı, toplam sprint zamanı ve performans düşüş yüzdesi değerleri hesaplanmıştır. Yapılan tekrarlı ölçümlerde tek yönlü varyans analizi (ANOVA) sonuçları iki farklı frekansta uygulanan akut tüm vücut titreşiminin tekrarlı sprint testi sonucu elde edilen en iyi sprint zamanı, toplam sprint zamanı ve performans düşüş yüzdesi değerlerinde tüm mesafelerde istatistiksel olarak anlamlı bir fark oluşturmadığını göstermiştir (p>0.05). Sonuç olarak bu çalışmanın bulguları farklı frekanslarda akut olarak uygulanan tüm vücut titreşiminin tekrarlı sprint performansını etkilemediğini göstermektedir. The purpose of this study was to compare acute effects of whole-body vibration (WBV) applied with different frequencies on repeated sprint performance (RSA). Fifteen healthy sport science students (Age 24.29±2.52 years; height 176.85± 6.82 cm; body mass 76.42±5.44 kg) participated in this study voluntarily. Subjects participated in 12x20m repeated sprint ability test with 20 seconds recovery intervals before and after 30Hz and 40 Hz whole-body vibration application in random order. After the repeated sprint test, subjects? best sprint time, total sprint time and percentage of performance decrement were determined for 0-10m, 10-20m and 0-20m distances. whole-body vibration was applied for 60-seconds during a half-squat position with either 30 or 40 Hz frequency and 4 mm amplitude. Results of one way ANOVA with repeated measures indicated no significant differences in best sprint time, total sprint time and percentage of performance decrement in any of the measured distances after 30Hz and 40Hz of whole-body vibration application (p>0.05). As a conclusion it can be said that acute whole-body vibration applied with different frequencies did not result in any changes in Repeated Sprint performance

The effect of N95 respirators on vital parameters, PETCO2, among healthcare providers at the pandemic clinics

Background Wearing face shields and masks, which used to have very limited public use before the COVID-19 outbreak, has been highly recommended by organizations, such as CDC and WHO, during this pandemic period. Aims The aim of this prospective study is to scrutinize the dynamic changes in vital parameters, change in end tidal CO2 (PETCO2) levels, the relationship of these changes with taking a break, and the subjective complaints caused by respiratory protection, while healthcare providers are performing their duties with the N95 mask. Methods The prospective cohort included 54 healthcare workers (doctors, nurses, paramedics) who worked in the respiratory unit of the emergency department (ED) and performed their duties by wearing valved N95 masks and face shields. The vital parameters and PETCO2 levels were measured at 0-4th-5th and 9th hours of the work-shift. Results Only the decrease in diastolic BP between 0 and 9 h was statistically significant (p = 0.038). Besides, mean arterial pressure (MAP) values indicated a significant decrease between 0-9 h and 5-9 h (p = 0.024 and p = 0.049, respectively). In terms of the vital parameters of the subjects working with and without breaks, only PETCO2 levels of those working uninterruptedly increased significantly at the 4th hour in comparison to the beginning-of-shift baseline levels (p = 0.003). Conclusion Although the decrease in systolic blood pressure (SBP) and MAP values is assumed to be caused by increased fatigue due to workload and work pace as well as increase in muscle activity, the increase in PETCO2 levels in the ED healthcare staff working with no breaks between 0 and 4 h should be noted in terms of PPE-induced hypoventilation

Renal complications of lipodystrophy: A closer look at the natural history of kidney disease

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/144612/1/cen13732_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/144612/2/cen13732.pd

Farklı Frekanslarda Uygulanan Akut Tüm Vücut Titreşiminin Tekrarlı Sprint Performansına Etkisi

Bu çalışmanın amacı farklı frekanslarda uygulanan akut tüm vücut titreşiminin tekrarlı sprint performansına etkisinin belirlemektir. Bu amaç doğrultusunda sağlıklı 15 Spor Bilimleri Bölümü öğrencisi (Yaş: 23.52±2.45 yıl, Boy: 177.85± 5.82 cm, VA: 76.55±5.32 kg) çalışmaya gönüllü olarak katılmıştır. Katılımcılar tekrarlı sprint testine rastgele olarak; titreşim uygulaması yapılmadan, 30 Hz ve 40 Hz frekans ve 4 mm genlikte uygulanan tüm vücut titreşimi uygulamasının ardından katılmışlardır. Tüm vücut titreşimi uygulaması 60 sn olarak yarım skuat posizyonunda uygulanırken, 60 saniyelik pasif dinlenmenin ardından katılımcılar 20 saniye dinlenme aralıklarıyla uygulanan 12x20 m tekrarlı sprint testine katılmışlardır. Tekrarlı sprint testi sonucunda katılımcıların 0-10 m, 10-20 m, 0-20 m mesafeleri için en iyi sprint zamanı, toplam sprint zamanı ve performans düşüş yüzdesi değerleri hesaplanmıştır. Yapılan tekrarlı ölçümlerde tek yönlü varyans analizi (ANOVA) sonuçları iki farklı frekansta uygulanan akut tüm vücut titreşiminin tekrarlı sprint testi sonucu elde edilen en iyi sprint zamanı, toplam sprint zamanı ve performans düşüş yüzdesi değerlerinde tüm mesafelerde istatistiksel olarak anlamlı bir fark oluşturmadığını göstermiştir (p>0.05). Sonuç olarak bu çalışmanın bulguları farklı frekanslarda akut olarak uygulanan tüm vücut titreşiminin tekrarlı sprint performansını etkilemediğini göstermektedir. The purpose of this study was to compare acute effects of whole-body vibration (WBV) applied with different frequencies on repeated sprint performance (RSA). Fifteen healthy sport science students (Age 24.29±2.52 years; height 176.85± 6.82 cm; body mass 76.42±5.44 kg) participated in this study voluntarily. Subjects participated in 12x20m repeated sprint ability test with 20 seconds recovery intervals before and after 30Hz and 40 Hz whole-body vibration application in random order. After the repeated sprint test, subjects? best sprint time, total sprint time and percentage of performance decrement were determined for 0-10m, 10-20m and 0-20m distances. whole-body vibration was applied for 60-seconds during a half-squat position with either 30 or 40 Hz frequency and 4 mm amplitude. Results of one way ANOVA with repeated measures indicated no significant differences in best sprint time, total sprint time and percentage of performance decrement in any of the measured distances after 30Hz and 40Hz of whole-body vibration application (p>0.05). As a conclusion it can be said that acute whole-body vibration applied with different frequencies did not result in any changes in Repeated Sprint performance

The effect of combined preconditioning strategies on isokinetic strength in well trained kickboxers

Purpose: The use of preconditioning strategies (PconSt) alone has a positive impact on performance. However, it is thought that there will be more impact on the performance of the combined preconditioning strategies, and this is the first work to prove it. This study was to examine the effect of combined preconditioning strategies on isokinetic strength in well-trained kickboxers. Material: The following preconditioning strategies were combined: morning resistance exercise (MRE), ischemic preconditioning (IP), active warm-up (AW-U), hormonal preconditioning (HP) and post-activation potentiation (PAP). Fifteen well-trained male kickboxers (age: 22.38 +/- 4.01years, height: 182.23 +/- 1.05cm, body mass: 77.67 +/- 8.01kg) volunteered for this study. Peak isokinetic knee extension and flexion moment were determined at 60 degrees/s, 180 degrees/s and 240 degrees/s bilaterally. All participants performed the pre-test and then were randomly divided into Sham and PconSt groups on separate days. For the PconSt group, MRE, IP, AW-U, HP and PAP were implemented sequentially before test. Results: The findings indicated significant increase in strength after combined training in the PconSt groups for right leg flexion at 180 degrees/s flexion (p < 0.05). The average percentage strength difference between sham and PconSt groups was 4.12 +/- 8.95%. Conclusions: This study showed that a combined preconditioning strategy increased isokinetic strength