Athlete psychology

Exercise in a Warm Environment

Summary

Exercise in hot conditions, compared to a neutral environment, results in a number of physiological changes that negatively affect performance. These changes work together to maintain stable blood pressure, a lower body temperature and, as much as possible, maintain muscle […]

Exercise in hot conditions, compared to a neutral environment, results in a number of physiological changes that negatively affect performance. These changes work together to maintain stable blood pressure, a lower body temperature and, as much as possible, maintain muscle function for the activities we do.

Effects of Exercise in Warm Environments

Trying to maintain a certain amount of activity in hot conditions, especially if it is intense, can overload the body’s ability to respond to stress, causing a sudden decrease in performance and potentially leading to serious health problems.

Skeletal Muscle Oxygen Consumption

During exercise, skeletal muscle oxygen consumption can increase from about 1.5 ml / kg-min at rest to 150 ml / kg-min at peak conditions. Finally, all the energy released by the muscles during physical activity is manifested as heat. In a person at rest, the heat output of the whole body is approximately 70 W (70 W = 1 kcal / min).

Учащение пульса

У каждого спортсмена, тренирующегося при высоких температурах, во время тренировки увеличивается частота сердечных сокращений (ЧСС), несмотря на постоянную интенсивность тренировки. Почему это происходит?

Heart rate under constant moderate exercise begins to increase in the first 10 minutes due to a gradual decrease in systolic volume (loss of plasma due to sweating). This phenomenon, called cardiac drift, is especially pronounced when medium to long-term efforts are made in hot conditions (30º – 35º), mainly related to the level of dehydration and internal temperature (Pallarés, 2016).

Mechanisms that cause an increase in heart rate:

  • Increasing blood flow to the skin to eliminate fever due to sweating, in turn, creates additional difficulties in returning the veins and, therefore, the systolic volume decreases (Pallarés, 2016).
  • An initial increase in heart rate, in turn, will result in a decrease in ejection volume (shorter time for filling the heart) and therefore in stroke volume (Pallarés, 2016).

Onset of fatigue during physical exertion

The early onset of fatigue during exercise in hot weather may be associated with direct effects of hyperthermia or indirect effects associated with a decrease in the maximum heart rate. Heat can be a limiting factor in endurance.

Conclusions

The environment has many restrictions on the ability to exercise. The potential for hyperthermia to reduce performance is usually mediated through its effect on the body’s ability to transport oxygen from the environment to contracted skeletal muscles. Excessive temperature rise during exercise reduces the efficiency of the circulatory system, limiting the heart’s ability to distribute oxygenated blood to the required level to the skin and muscles.

Recommendations

Прием жидкости во время упражнений, частые перерывы в приеме гидратов. Прекратите заниматься и обратитесь к профессионалу, если появятся такие симптомы, как снижение потоотделения, судороги, слабость, покраснение кожи, головная боль, тошнота, нечеткость зрения, нестабильность, непереносимость.

5 июня, Всемирный день окружающей среды.

Прогресс, индустриализация и постоянная агрессия против окружающей среды привели нас к серьезному ухудшению климатических изменений, которое затрагивает все страны мира, температура на нашей планете повысилась на 0,6ºC, а уровень моря повысился с 10 до 12 сантиметров, все чаще случаются наводнения, засухи и повышается риск возникновения пожаров.

Эти эффекты наносят ущерб нашей экосистеме в целом, морскому дну, фауне, флоре, а также людям. Поэтому совершенно необходимо, чтобы, заботясь о своем здоровье и благополучии, мы также заботились об окружающей среде.

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