The Role of Physical Activity in

Managing Stress

Table of Contents

1. Introduction........................................................................................................................3

2. Background....................................................................................................................3

3. Aims/Hypotheses....................................................................................................4

4. Samples and Methods....................................................................................4

5. Ethics.................................................................................................................5

6. Future Perspectives.......................................................................................6

1. Introduction

Stress is a world-wide problem that impacts mental health and wellbeing and its presence is associated with maladaptive physiological and psychological responses to stressors. If left unaddressed, chronic stress might lead to severe pathologies with a profound impact on mortality. Therefore, there is an urgent need for effective interventions to improve the burden and perception of stress, and to prevent the development of chronic stress-related physical and mental disorders (Stults-Kolehmainen & Sinha, 2013). Recent findings indicate that physical activity is a promising intervention for stress management. Exercise might have positive impacts on psychological and physiological responses to stress, and might reduce stress through peripheral endocrine mechanisms (eg, cortisol) as well as central nervous system mechanisms (eg, the release of endorphins) (Jin, 1992; Stults-Kolehmainen & Sinha, 2013).

Although these findings may suggest that physical activity can in general be a beneficial tool for managing stress, there are major gaps in our knowledge about which specific types of physical activity are most beneficial. Many studies on being physically active and experiencing stress do not distinguish between types, which could potentially have varying effects on a person’s stress (Stults-Kolehmainen & Sinha, 2013). The purpose of this study was to evaluate which specific physical activities are of the most value in stress management, and whether there are certain activities which may offer greater benefits in reducing stress.

Physiological studies highly emphasize that physical activity alleviates mental health outcomes by moderating physiological stress responses. Daily physical activity improves heart rate variability – a physiological indicator of stress resilience – through increasing parasympathetic activity and decreasing sympathetic activity, which are indications of a relaxed state (Stults-Kolehmainen & Sinha, 2013). Aerobic exercises such as running or swimming are additionally associated with reducing depression and anxiety, suggesting that the intensity of physical activity is related to the benefits for one’s mental health (Anderson & Shivakumar, 2013).

However, the existing literature reveals significant limitations in terms of specificity. And although the broad value of exercise is well-established, the specific kinds, durations and intensities of exercise that are best for relieving stress are poorly defined. Most studies group all physical activity indicators together without calling out which modes might be better (Stults-Kolehmainen & Sinha, 2013). This lack of discrimination is a major omission in the literature, since it’s not

2. Background

The link between PA and stress-reduction is well-documented from a physiological and psychological standpoint. There are many reasons why exercise is considered a great stress-reliever, including the impact it has on our body’s stress hormones. Physical activity has been shown to decrease stress hormones such as cortisol, often referred to as the ‘stress hormone’, while also increasing the release of endorphins, the brain chemicals that help our body and mind feel good (Stults-Kolehmainen & Sinha, 2013). Aerobic exercises such as running or swimming are additionally associated with reducing depression and anxiety, suggesting that the intensity of physical activity is related to the benefits for one’s mental health (Anderson & Shivakumar, 2013).

necessarily the case that all forms of exercise will be equally effective for stress reduction. For example, benefits to mental health outcomes are often cited in conjunction with aerobic exercise, but the evidence for other forms such as resistance training or flexibility training (eq. yoga) is less clear and should be examined more closely (Paluska & Schwenk, 2000).

This gap highlights the need for more research into the specific ways in which different types of physical activities affect stress and mental health. There is an urgent need for studies that not only confirm the general stress-reduction benefits of different types of exercise, but also look at how differences in exercise type, frequency, duration and intensity affect the mental effects of exercise. This level of detail is crucial to developing exercise recommendations that can be tailored to the specific needs of individuals looking to effectively manage their stress.

3. Aims/Hypotheses

• The aim of this study is to examine the relationship between different types of physical activity and stress reduction.

• It is hypothesized that regular aerobic exercise at moderate intensities (such as brisk walking or swimming) will result in reduced perceived stress relative to being sedentary.

4. Samples and Methods

Population and Controls

This study will recruit adults between 18 and 65 years old suffering from moderate stress, which includes the working and active adult population most susceptible to stress-related physical ailments as a control group. Meanwhile, the experimental group consisted of sedentary patients between 18 and 65 years old with a control group that consisted of inactive adults in the same age range.

Sample Size and Power

The sample will consist of 40 participants, 20 randomly included in the intervention and 20 in the control group – these numbers are limited by realistic recruitment possibilities and are also in line with power-analysis considerations that allow to detect a medium effect size (d = 0.5) with 80 per cent power at the level of 5 per cent. The expected effect size is in line with previous research in psychological studies and is appropriate considering the heterogeneity in the stress response and the expected moderate effect of the intervention on the stress level (Quintana, 2017; Schweizer & Furley, 2016).

Measures and Data Collection

Psychological stress will be evaluated by means of standard, validated questionnaires such as

the Perceived Stress Scale (PSS) which makes it easy and powerful to assess perceptions of

stress – meaning, how stressful one finds one’s life in general over the past month.For physiology,

rather than using HRV (which requires special equipment), we can use simpler self-report of

cardiovascular symptoms such as sleep quality and general fatigue that can be added to the

questionnaire to make it easier, require less technology, and rely on data that is less dependent

on how people answer or respond.

Methodology

As a simple quantitative study, the research will be done using a randomized controlled trial.

People will be given the intervention (physical activity according to a predefined protocol) or

control (those who do not receive the intervention). This is the way to be certain that the change

in the measurement of stress is actually due to the physical activity intervention and not other

variables.

End-point and Statistical Analysis

The main outcome will be change in reported stress from baseline, which will be tested at the end

of a 12-week physical activity programme. Statistical testing will involve paired t-tests, comparing

stress levels from before and after the intervention. Independent t-tests will compare changes

between intervention and control groups. This will demonstrate whether the physical activity

used did or did not reduce stress.

Risks and Bias

The principal negative risks include discomfort or injury associated with the activities, which can

be reduced by using the pre screening health questionnaire to make activity recommendations.

Participants’ psychological distress due to participation will be monitored using planned random

check-ins. The research team will be blinded to group assignments. Randomisation can help to

reduce bias due to social desirability; randomisation ensures equal numbers of participants across

groups. Furthermore, minimizing researcher bias can be achieved by collecting anonymous self-

report data to reduce bias associated with self-reporting.

5. Ethics

Participant Information and Consent

Participants will be informed of the reasons and purposes of the research, the procedures

followed, the potential risks and benefits of participation, and information about other aspects of

the process of the research. This information is included in an informed consent form that

participants are asked to sign before entering the study. The form will describe the details of the

physical activities during the training and the psychological or physical risks. It will explain that

the data collected would be confidential and can only be used for research purposes. Participants will also be informed of their right to withdraw from the study at any time without penalty. (Manti & Licari, 2018; Tremaine et al., 2005)

Withdrawal and Data Management

At any time during the study, participants can withdraw their consent and will be removed from the study. Data that is collected during the study and transferred to the analysis will be excluded if requested. All data will be anonymised and securely saved on an encrypted remote server. This data will only be accessible for persons with the necessary permissions and will be deleted after the retention period is over ( Tremaine et al., 2005).

GDPR Compliance

The study will ensure a complete compliance with General Data Protection Regulation (GDPR), including: • explicit consent for the collection and processing of data;• the quality of the personal data and its accuracy;and • the implementation of appropriate technical and organizational measures to protect data. The study’s compliance with GDPR will be overseen by the appointed Data Protection Officer, whose task would be to monitor all the aspects of the study in line with relevant legislation, including GDPR ( Lalova-Spinks et al., 2022).

6. Future Perspectives

These findings could also affect society through improved stress-management strategies that incorporate physical activity. Practitioners might be more inclined to build physical activity recommendations into routine protocols for stress management, ultimately reducing healthcare costs for individuals with stress-related illnesses.

Future investigations should elucidate how sustained moderate- to high-intensity physical activity might aid in reducing stress over longer periods of time, and how the optimal forms of physical activity vary across different age groups and cultural backgrounds. Exploring the mechanisms through which physical activity reduces stress might also allow us to refine the interventions, enhancing their effectiveness and resulting in greater health benefits (Stults-Kolehmainen & Sinha, 2013; Kandola et al., 2018). Further research might also delve into the integration of technology such as wearable devices to monitor and encourage physical activity that can be employed to enhance the efficacy of these interventions in real-world settings.

7. References