The impact of evening exercises on sleep quality

For many of us the only option is to train in the evening, before going to bed. But does this practice have a negative impact on the quality of our sleep? sleep it is essential for the recovery of the body and the optimal functioning of the brain, which is why it is natural to ask whether evening physical exercise can disturb our rest.

In this article we will explore what science says about the connection between evening training and sleep quality. We will analyze the contradictory opinions present in the specialized literature and discuss the results of a recent study on this topic. Our goal is to provide actionable information to help you make informed decisions about your exercise program and optimize both your training and sleep.

Contradictory opinions on evening physical exercises

Regarding the effects of evening physical exercises on the quality of sleep, specialists have divergent opinions. Some argue that late workouts can disturb sleep, while others believe they can have benefits for our rest.

The traditional perspective is that intense physical exercise, practiced shortly before going to bed, can lead to an increase in body temperature and restless sleep. This idea is based on the fact that, to fall asleep easily, your body temperature must drop slightly. Therefore, if we play sports in the evening, this natural process can be interrupted.

On the other hand, there is also the belief that physical exercises before going to bed can have positive effects on sleep. Proponents of this theory argue that exercise can reduce stress and anxiety, two of the main causes of sleep disorders. Furthermore, the physical fatigue produced by training can make it easier to fall asleep.

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An argument in favor of this perspective is provided by the results of the 2013 Sleep in America survey. This study found no link between physical exercise performed less than 4 hours before bedtime and sleep problems.

Plus, oh meta-analysis which included 23 studies concluded that light to moderate intensity physical exercises, performed four hours before going to bed, do not negatively affect the quality of sleep in healthy people.

These findings suggest that the impact of evening workouts on sleep may depend on individual factors, such as fitness level, type and intensity of exercises, as well as the exact timing of their practice. In the next chapter we will analyze in detail a recent study that investigated this problem.

Details of the recent randomized controlled trial

To clarify the impact of evening exercise on sleep quality, a randomized, controlled trial was recently conducted. This research involved 16 participants (8 women and 8 men) aged between 21 and 25.

Criteria for selecting participants

Participants included in the study met the following criteria:

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• They did not follow a special diet
• They were not taking any medications that could affect the results (e.g. sleeping pills)
• They were healthy and fit for physical activity

Study design

Participants were randomly divided into three groups:

1. Control group (without exercise)
2. Group with exercises performed 4 hours before going to sleep
3. Group with exercises performed 2 hours before going to sleep

Each group followed a specific training and sleep protocol. Participants in the exercise groups performed moderate-intensity physical activities for one hour, at 60% of their maximum heart rate.

Data collection

Before starting the study, participants completed:

• Subjective sleep quality questionnaire
• Assessments of physical activity level
• Anthropometric measurements

During the study, participants were asked to hold sleep logsin which they observed:

• Time to go to sleep
• Sleep duration
• Wake up time

This information was essential for analyzing the impact of evening physical exercises on sleep quality and duration.

The study provided valuable data to better understand the relationship between evening workouts and sleep.

Results of the study

The randomized, controlled trial provided valuable data regarding the impact of evening exercise on sleep quality and calorie intake. The results were analyzed using various statistical tools and methods.

Sleep quality assessed by the Pittsburgh Sleep Quality Index

One of the main tools used to evaluate sleep quality was Pittsburgh Sleep Quality Index (PSQI). The mean score of the participants was 4.50 ± 2.00, with 25% of them scoring > 5, indicating some sleep problems.

Different between sexes

A detailed analysis of the data revealed that there were no statistically significant differences between men and women regarding:

• Sleep parameters
• The response to effort
• Calorie intake the next day

This finding suggests that the impact of evening exercise on sleep and calorie intake is similar for both genders.

Calorie intake

The study also compared calorie intake between groups of participants. It was found that:

• The control group had a mean intake of 2245 ± 299 kcal
• The group with exercises performed 4 hours before going to sleep had an average intake of 2800 ± 397 kcal
• The group with exercises performed 2 hours before going to sleep had an average intake of 2662 ± 363 kcal

These results indicate a higher calorie intake in the groups that performed physical exercises in the evening, compared to the control group.

The impact on sleep and calorie intake

Data analysis showed that evening exercise (1 hour at 60% of maximum heart rate) did not negatively affect sleep quality and did not significantly increase evening calorie intake in healthy young adults.

An interesting result was that an improvement in sleep quality, compared to the baseline state, was only observed when the exercises were performed 4 hours before the usual bedtime.

These findings offer a nuanced perspective on the relationship between evening workouts, sleep, and calorie intake, suggesting that the exact timing of exercise may be an important factor in modulating these effects.

Conclusion

The randomized, controlled trial discussed in this article has made a valuable contribution to understanding the impact of evening exercise on sleep quality and calorie intake. The findings suggest that moderate workouts performed in the evening do not negatively affect sleep and do not significantly increase calorie intake in healthy young adults.

One of the main findings of the study was that physical exercises practiced 4 hours before going to sleep were associated with an improvement in sleep quality, compared to the initial state. This finding has important practical implications for people who prefer to exercise in the evening, suggesting that the optimal time to exercise may be a few hours before bedtime.

In conclusion, the study offers a promising perspective on the compatibility between evening physical exercises and quality sleep. To optimize the benefits and minimize potential negative effects we recommend:

• Choosing light to moderate intensity physical activities
• Do the training a few hours before going to bed
• Adaptation of the exercise program based on individual preferences and reactions

By incorporating these strategies into a balanced daily routine, which also includes a healthy diet and adequate sleep hygiene, we can enjoy the benefits of exercise without compromising rest and recovery.