Introduction and Purpose: In chronic heart failure (CHF), exercise rehabilitation results in a reduced risk of mortality, decreased disease severity, and increased functional ability. Resistance training is an important component of cardiac rehabilitation; however, an optimal training velocity that produces physiological and functional benefits at minimal perceived exertion and cardiovascular stress has yet to be identified. CHF patients need to be very efficient and perform the exercise that will give them the greatest benefits because of their poor exercise tolerance and increased risk of cardiovascular complications during exercise. In older populations, high velocity resistance training results in greater improvements in functional ability than low velocity resistance training. The use of high velocity resistance training in patients with CHF has yet to be examined; however it may enhance higher velocity activities of daily living while using a lower training load. The lower load associated with high velocity training may be less strenuous and result in lower cardiovascular stress, whilst maintaining a relatively similar power output compared to traditional low-velocity training. The purpose of this study was to compare the acute cardiovascular responses and perceived exertion of high and low velocity resistance exercises. Methods and Measures: 6 male and 1 female patients with systolic heart failure (CHF NYHA Class I-III) were recruited to perform two separate, randomly assigned exercise sessions. These sessions consisted of 5 exercises (hack squat, chest press, knee flexion, lat pull down and knee extension); one with a low velocity of contraction (3 second concentric phase: 3 second eccentric phase at 50% of the slow velocity 1-RM) and one with a high velocity (1 second concentric phase: 3 second eccentric phase at 50% of the high velocity 1-RM). During both sessions, heart rate, blood pressure, and a rating of perceived exertion (RPE) were obtained after the completion of each exercise. Results: Despite a similar relative mechanical load, the high velocity workout produced significantly lower systolic blood pressure (121.2 vs. 132.8 mmHg), mean arterial pressure (87.8 vs. 93.5), and RPE (3.7 vs.4.8) than the low velocity workout (p<0.05). The high velocity workout was not significantly different from the low velocity workout for heart rate, rate pressure product and diastolic blood pressure. Conclusion: We conclude that the high velocity workout produces more favourable blood pressure responses to resistance training in patients with CHF than the low velocity workout and may be used to enhance functional outcomes in cardiac rehabilitation programs.

Viena iš svarbiausių daugiamečio sportinio rengimo veiksmingumo sąlygų yra tikslingas profesionalus rengimo valdymas: multispektrinis ir daugiamokslinis vyksmas – tikslingas atleto sportinio parengtumo gerinimas, įgyvendinant numatytas pratybų ir varžybų programas Būtina veiksmingo sportinio rengimo valdymo sąlyga – svarbiausių veiksnių, labiausiai lemiančių jaunųjų krepšininkų sportinį parengtumą ir sportinių rezultatų gerėjimą, geriausių rezultatų siekimą, pažinimas. Tai svarbu todėl, kad krepšininkų žaidimo kokybė, sėkmė svarbiausiose varžybose priklauso nuo daugelio veiksnių. Deja, pasigendama tyrimų, nagrinėjančių pagrindinių jaunųjų krepšininkų morfologinių ir greitumo jėgos rodiklių priklausomybę, jų įtaką fiziniam jaunųjų krepšininkų parengtumui. Iškyla aktuali mokslinė problema – nustatyti jaunųjų krepšininkų morfologinių ir greitumo jėgos rodiklius, jų kaitą ir tarpusavio ryšį brendimo laikotarpiu. Tyrimo objektas – jaunųjų krepšininkų morfologiniai ir greitumo jėgos rodikliai, jų kaita ir tarpusavio ryšys. Tyrimo tikslas – nustatyti ir įvertinti jaunųjų krepšininkų morfologinius ir greitumo jėgos rodiklius, jų kaitą ir tarpusavio ryšį brendimo laikotarpiu. Tyrimo uždaviniai: 1. Nustatyti ir įvertinti pagrindinius jaunųjų krepšininkų morfologinius rodiklius ir jų kaitą. 2. Nustatyti ir įvertinti greitumo jėgos rodiklius ir jų kaitą. 3. Nustatyti morfologinių ir greitumo jėgos rodiklių tarpusavio ryšį. Tyrimo metodai Tyrimo uždaviniams spręsti buvo taikyti tokie... [toliau žr. visą tekstą] / One of the most significant conditions for the effective long-term athlete training is a purposeful professional control of training: multispectral and interdisciplinary process focused on the improvement of athletic training by implementing planned programs of training sessions and competitions. An essential condition for effective athletic training is the understanding of the most important factors influencing athletic fitness and increased sport performance in young basketball players. The quality of their play and the success in the main competitions depend on a series of factors. This awareness and the lack of previous studies analysing interdependence between the key morphological characteristics and the indicators of velocity power as well as their influence on physical fitness in young players make this scientific problem to determine morphological characteristics and the indicators of velocity power in young basketball players, their change and correlation during puberty relevant. Object of the study: morphological characteristics and indicators of velocity power in young basketball players, their change and interrelations. Aim of the study is to determine and evaluate morphological characteristics and indicators of velocity power, their change and correlation during the period of puberty. Objectives of the study: 4. To determine and evaluate the main morphological characteristics in young basketball players and their change. 5. To determine and evaluate indicators... [to full text]