OBJECTIVE To compare, retrospectively, the values of maximum heart rate (MHR) and the decrease of the heart rate at the first minute of recovery, which were obtained in an exercise test (ET) performed in two different ergometers and at different moments. METHODS Sixty individuals (from 29 to 80 years old), submitted to cardiopulmonary ET in a cycle of lower limbs (CLL) in our laboratory and w...

In this study we assessed the effect of acute hypoxia on post-exercise parasympathetic reactivation inferred from heart rate (HR) recovery (HRR) and HR variability (HRV) indices. Ten healthy males participated in this study. Following 10 min of seated rest, participants performed 5 min of submaximal running at the speed associated with the first ventilatory threshold (Sub) followed by a 20-s al...

BACKGROUND The aim of this study was to investigate muscle damage indicators and electromyography activities of quadriceps muscles at 25° of hip flexion in untrained healthy females after an eccentric exercise induced muscle fiber damage. METHODS A total of 14 healthy females participated in this pre-experimental study. The subjects performed maximal eccentric quadriceps contractions at 25˚ o...

INTRODUCTION There is an established link between smoking, abnormal heart rate (HR) values, and impaired cardiovascular health in middle-aged or older populations. The purpose of this study was to examine the effects of smoking on resting HR and on HR responses during and after exercise in young adults. METHODS A sample of 298 young adults (159 men), aged 20-29 years old, were selected from a...

Chest auscultation, and serial maximum ventilatory function tests were carried out on twelve healthy non-smokers, eight healthy cigarette smokers, and five asthmatics, before, during and after moderately heavy treadmill exercise. During the exercise, asthmatics, as well as non-asthmatics, showed increased maximum flow rates. Significant post-exercise bronchoconstriction was exhibited by the hea...

Ambrisentan in 22 patients with pulmonary hypertension diagnosed during exercise (ePH) improved pulmonary hemodynamics; however, there was only a trend toward increased maximum oxygen uptake (VO2max) secondary to decreased maximum exercise systemic oxygen extraction (Ca-vO2). We speculate that improved pulmonary hemodynamics at maximum exercise "unmasked" a pre-existing skeletal muscle abnormal...

BACKGROUND Impaired motor performance and reduced maximum exercise capacity during and after treatment of acute lymphoblastic leukemia (ALL) has been shown. However, no longitudinal study monitoring motor performance after cessation of treatment has been published. Whether sub-maximal exercise capacity is reduced is unknown. PROCEDURE Motor performance of pediatric ALL survivors, treated with...

Doped lithium lanthanum zirconium oxide (LLZO) is a promising class of solid electrolytes for lithium-ion batteries due to their good electrochemical stability and compatibility with Li metal anodes. Ionic diffusivity in these ceramics known occur via correlated, vacancy-mediated jumps Li+ between alternating tetrahedral octahedral sites. Aliovalent doping at the Zr site increases concentration...

Age predicted maximum heart rates based on the formula 220-age have long been used in fitness and clinical settings to gauge exercise intensity and predict exercise test end points. Exercise stress tests have in some cases been routinely terminated based on the attainment of this equation, despite recommendations that age predicted maximum heart rates should not be used as an exercise test endp...

objective: exercise activity could be an amendment to polycystic ovary syndrome (pcos). however the acute and chronic effects of various exercise intensities on serum leptin levels are ambiguous. this study investigates the acute and chronic responses of various intensities of exercise on serum leptin levels and weights of female rats with pcos. methods: in this semi-empirical study, 80 adult w...