, ,
Volume 12, Issue 7 (4-2014)
Abstract
The purpose of this study was to determine the relationship between changes of some of the
cardiorespiratory factors during submaximal activity with slow component of Vo2 after static and dynamic
stretching in 16 active women from physical education college ( Mean ± SD : age, 23.87± 1.62 yr ; weight,
57.20 ± 7.84 kg ; height, 163.46 ± 6.23 cm; body fat % ,23.96 ± 2.70 and Vo2max, 42.15 ± 3.41 ml.kg-1.min-
1). After measurement of Vo2max and LT , the subjects performed two protocols of stretching (static and
dynamic) and one protocol without stretching before submaximal activity (treadmill running at 70% Vo2max)
in three separate sessions. Respiratory gas exchange and HR was measured by gas analyzer and polar
and time constants (τ1- τ2 - τ3) were calculated from O2 kinetics graph. Results revealed a positive correlation
between slow component of Vo2 with changes of VE (0.76), Fb (0.48), Tv (0.67), HR (0.41), τ1 (0.49) ,τ 2
(0.52) , τ 3 (0.46) and steady state oxygen uptake increased significantly after static stretching (P=0.031).
Therefore, results of this study showed that some of changes in slow component of Vo2 after static and
dynamic stretching related to metabolic and cardiorespiratory factors.
Ali Abbasi, Heydar Sadeghi, Mehdi Zamanian , Anoshirvan Kazemnejad,
Volume 20, Issue 23 (9-2022)
Abstract
The purpose of present study was to examine the effects of short time static and dynamic stretching of muscles on kinematics variability of lower extremity in healthy active males during cycling. 15 physical education and sport sciences male students from Kharazmi University voluntarily participated in this study. Subjects referred to the laboratory during two days, with 48 hours intervals between each sessions, and lower extremity kinematics data were collected from 30 pedaling cycle on the stationary cycle in 70 RPM in situation of without stretching, after 2, 5, and 10 minutes post stretching by means of motion analysis camera in 50 Hz frequency. Hip, knee and ankle joints angular displacement and velocity were extracted for constructing time series and variability calculation. Results of repeated measure ANOVA did not show any significant differences in angular displacement and velocity variability in hip, knee and ankle joints after 2, 5, and 10 minutes post stretching (P>0.05). Regarding results, probably it can be use static and dynamic stretching in warm up programs before cycling or rehabilitation on stationary cycle.
