This study aimed to examine the exercise-induced heart rate response (HRR) and heart rate variability (HRV) in subjects caused by inhaling smoke from tobacco cigarettes (TC) and aerosolized vapor from electronic nicotine dispensing systems (ENDS) (commonly referred to as e-cigarettes (EC)). A randomized crossover study recruited 24 young adult male smokers with an average age of 23 years and with a smoking habit of at least two years. Heart rate response was recorded after a maximal multistage shuttle 20 m run test (MMST) under three different levels of nicotine: Control 0 mg nicotine of EC (C), 3 mg nicotine of EC (3EC), and 3 mg nicotine of TC (3TC). HRV was evaluated based on the beat-to-beat time interval during the running test. The results showed no statistically significant differences in the run time to exhaustion under the three conditions (C: 398 ± 151 s; 3EC: 399 ± 160 s; 3TC: 381 ± 150 s). Exercise-induced HRR was significantly attenuated under the TC condition (p < 0.05). Intriguingly, the HRV standard deviation of normal-to-normal intervals (SDNN) during exercise significantly increased under 3EC and 3TC. The results showed that a significant acute autonomic cardiac modulation during exercise is induced by an acute episode of EC and TC smoking.

The International Society for Technology in Education (ISTE) requires institutional education to adapt to rapid technology and prepare students to compete internationally by using e-learning media in the classroom. The purpose of the study's literature is to strengthen every argument about STEAM education. Support argument required originating data source from secondary data. The method used in this research is the study literature method. Data collection techniques through collecting articles on STEAM, STEAM education, and technology in the learning process. Databases used for journal searches include Elsevier, Emerald, Springer, Research Gate, Academia Edu, Google Scholar, and Publish or Perish. The validity test of the data through several stages. The process starts with data collection, reduction, presentation, and withdrawal conclusion. The result of this study is that STEAM builds human resources who can think critically, logically, and systematically and have global competitiveness. Implementing STEAM education enables students to understand the importance of integrating multiple disciplines. Moreover, learners can improve their logical thinking and provide comprehensive opportunities for students to practice their thinking skills.

This study was aimed at investigating the effects of six-week Plyometric, Functional, and Interval training on body composition, power, and kicking speed. The study employed an experimental research design involving twenty male university students who were practitioners of Pencak Silat sports, following informed consent (average age 20.2 ± 1.32 years, height 168.9 ± 5.70 cm, body weight 63.74 ± 11.54 kg). The students were not isolated; their food intake and sleep patterns were not controlled, but they were advised not to stay up late and to avoid smoking and consuming alcoholic beverages. Participants engaged in Plyometric training once a week on Mondays, functional training once a week on Wednesdays, and interval training once a week on Fridays. Plyometric, Functional training and Interval training (PFIT) was performed for 70-80 minutes per session, for six weeks, with low intensity and moderate volume on 90 -120 contacts. There were significant improvements (p <0.05) in flexibility, force and pear power, jump height and left kick speed. Body fat, muscle mass, visceral fat and bone density also experienced significant changes (p 0.05).

This study investigated the influence of the intention to lean the body forward on spatiotemporal and ground reaction force variables during the acceleration phase of a sprint. Fourteen active adults performed two 50 m sprints (with and without the intention to lean), during which spatiotemporal variables and impulses were obtained using a long force platform system. Effect size (Cohen’s d) was used to examine the differences between the two trials. We found that running speed and net anteroposterior impulse did not change by the intention for all steps. However, step frequency increased in the initial two steps through decreases in support time and flight time by the intention. Moreover, these shorter support and flight times were caused by a decrease in the vertical impulse. The propulsive impulse did not change during the initial part of acceleration phase, but the braking impulse decreased at the first step. This study demonstrates that an intention to lean the body forward leads to a smaller braking impulse and a higher step frequency through shorter support and flight times and a smaller vertical impulse during the initial part of the acceleration phase of a sprint.

The purpose of this study was to develop a critical reasoning and independent character instrument on the topic of human blood circulation. The method used was research and development (R&D) with a 4D model (Define, Design, Develop, and Disseminate). The results showed that the validity value of the content of critical reasoning instruments obtained a final value of 0.97, while independent instruments obtained a value of 1, which was perfect. Judging from empirical validity, vital and independent reasoning instruments were declared valid because they had a value above 0.355 from 31 students tested. Critical and independent reasoning instruments were declared reliable. The Alpha Cronbach value >0.70 had good distinguishing power because the value of the Corrected Item-Total Correlation did not exceed the Alpha Cronbach value. Developing assessment instruments for a critical and independent character in human blood circulation for fifth-grade elementary students was successful, demonstrating high validity and reliability, and held the significant potential to enhance science education through technology integration.

Lactate is a metabolite produced during anaerobic glycolysis for ATP resynthesis, which accumulates during hypoxia and muscle contraction. Tobacco smoking significantly increases blood lactate. Here we conducted a counter-balanced crossover study to examine whether this effect is associated with inhaling nicotine or burned carbon particles. Fifteen male smokers (aged 23 to 26 years) were randomized into 3 inhalation conditions: tobacco smoking, nicotine vaping, and nicotine-free vaping, conducted two days apart. An electronic thermal evaporator (e-cigarette) was used for vaping. We have observed an increased blood lactate (+62%, main effect: p < 0.01) and a decreased blood glucose (−12%, main effect: p < 0.05) during thermal air inhalations regardless of the content delivered. Exercise-induced lactate accumulation and shuttle run performance were similar for the 3 inhalation conditions. Tobacco smoking slightly increased the resting heart rate above the two vaping conditions (p < 0.05), implicating the role of burned carbon particles on sympathetic stimulation, independent of nicotine and thermal air. The exercise response in the heart rate was similar for the 3 conditions. The results of the study suggest that acute hypoxia was induced by breathing thermal air. This may explain the reciprocal increases in lactate and decreases in glucose. The impaired lung function in oxygen delivery of tobacco smoking is unrelated to nicotine.