Metabolism, Metabolism in tissues
Natural Cycles Show Your Body Health State
Mar
Natural cycles are the rhythmic patterns that occur within the human body, governing various physiological processes essential for maintaining overall health and well-being. These cycles, such as the circadian rhythm, menstrual cycle, and digestive cycle, play a crucial role in regulating bodily functions and can provide valuable insights into an individual’s health status. By understanding and monitoring these natural cycles, we can gain a deeper understanding of our bodies and take proactive steps to optimize our physical and mental well-being.
This article aims to explore the concept of natural cycles, their importance in maintaining health, and how we can harness this knowledge to promote holistic well-being. We will delve into the various types of natural cycles, their physiological significance, and the potential consequences of disruptions to these cycles. Additionally, we will discuss practical strategies for monitoring and optimizing natural cycles, empowering readers to take control of their health and embrace a more balanced, harmonious way of life.
Understanding the Concept of Natural Cycles
Definition of natural cycles in the human body
Natural cycles refer to the inherent biological rhythms that occur within the human body, orchestrating various physiological processes and functions. These cycles are essential for maintaining homeostasis, the body’s internal balance, and ensuring optimal health[1]. Natural cycles are governed by complex interactions between hormones, neurotransmitters, and external environmental cues, creating a delicate interplay that regulates bodily functions.
Types of natural cycles
There are several types of natural cycles that play a crucial role in human health, including:
- Circadian rhythm: The body’s internal 24-hour clock that regulates sleep-wake cycles, hormone secretion, and metabolism.
- Menstrual cycle: The monthly reproductive cycle in women, characterized by hormonal fluctuations and physical changes.
- Digestive cycle: The cyclical process of food breakdown, nutrient absorption, and waste elimination.
Importance of natural cycles in maintaining overall health
Natural cycles play a vital role in maintaining overall health and well-being. When these cycles function optimally, they promote physical and mental balance, allowing the body to perform at its best[2]. For example, a well-regulated circadian rhythm ensures proper sleep, which is essential for cognitive function, emotional regulation, and immune system support. Similarly, a healthy menstrual cycle is indicative of reproductive health and hormonal balance in women.
Factors that can disrupt natural cycles
Various factors can disrupt natural cycles, leading to potential health consequences. These factors include:
- Irregular sleep patterns or shift work
- Stress and emotional distress
- Poor nutrition and dietary habits
- Exposure to artificial light at night
- Certain medications or medical conditions[3]
Recognizing and addressing these disruptive factors is crucial for maintaining the integrity of natural cycles and promoting overall health.
The Circadian Rhythm: The Body’s Internal Clock
What is the circadian rhythm?
The circadian rhythm is a natural, internal process that regulates the sleep-wake cycle and other physiological functions in the human body. This 24-hour cycle is influenced by environmental cues, primarily light and darkness, and is controlled by a master clock located in the brain’s suprachiasmatic nucleus (SCN)[4]. The circadian rhythm plays a critical role in synchronizing various bodily functions to optimize health and performance.
Physiological processes regulated by the circadian rhythm
The circadian rhythm orchestrates numerous physiological processes, including:
- Sleep-wake cycles
- Hormone secretion (e.g., melatonin, cortisol)
- Body temperature regulation
- Metabolism and digestion
- Cognitive function and alertness[5]
By aligning these processes with the natural 24-hour cycle, the circadian rhythm helps maintain optimal health and well-being.
Effects of disrupted circadian rhythm on health
Disruptions to the circadian rhythm can have significant health consequences. Chronic misalignment of the circadian rhythm, often experienced by shift workers or individuals with irregular sleep patterns, has been linked to various health problems, such as:
- Metabolic disorders (e.g., obesity, diabetes)
- Cardiovascular disease
- Impaired cognitive function and memory
- Mood disorders (e.g., depression, anxiety)[6]
Recognizing the importance of maintaining a healthy circadian rhythm is crucial for preventing these potential health issues.
Strategies to maintain a healthy circadian rhythm
To support a healthy circadian rhythm, consider the following strategies:
| Strategy | Benefit | |
|---|---|---|
| 1 | Stick to a consistent sleep schedule | Helps regulate the sleep-wake cycle |
| 2 | Expose yourself to natural light during the day | Strengthens circadian rhythms |
| 3 | Avoid artificial light at night | Prevents disruption of melatonin production |
| 4 | Engage in regular physical activity | Promotes sleep quality and daytime alertness |
By implementing these strategies, individuals can support their body’s natural circadian rhythm and promote overall health and well-being.
The Menstrual Cycle: A Window into Women’s Health
Understanding the menstrual cycle
The menstrual cycle is a natural, monthly process that occurs in women of reproductive age. This cycle is characterized by hormonal fluctuations that prepare the body for potential pregnancy and shed the uterine lining when pregnancy does not occur. The menstrual cycle is typically divided into four phases: menstrual, follicular, ovulatory, and luteal[7]. Each phase is associated with specific hormonal changes and physical symptoms.
Hormonal changes during the menstrual cycle
The menstrual cycle is regulated by the complex interplay of hormones, primarily estrogen and progesterone. These hormones are produced by the ovaries and are responsible for the following changes:
- Estrogen: Stimulates the growth and thickening of the uterine lining, prepares the body for ovulation, and supports overall reproductive health.
- Progesterone: Maintains the uterine lining, supports early pregnancy, and regulates the shedding of the uterine lining during menstruation[8].
Monitoring hormonal changes throughout the menstrual cycle can provide valuable insights into a woman’s reproductive health and overall well-being.
Menstrual cycle irregularities and their implications
Menstrual cycle irregularities can be indicative of underlying health issues. Some common irregularities include:
| Irregularity | Potential Implications | |
|---|---|---|
| 1 | Amenorrhea (absence of menstruation) | Pregnancy, hormonal imbalances, eating disorders |
| 2 | Oligomenorrhea (infrequent menstruation) | Polycystic ovary syndrome (PCOS), thyroid disorders |
| 3 | Menorrhagia (heavy menstrual bleeding) | Uterine fibroids, endometriosis, hormonal imbalances |
| 4 | Dysmenorrhea (painful menstruation) | Endometriosis, uterine fibroids, pelvic inflammatory disease |
If you experience persistent menstrual irregularities, it is essential to consult with a healthcare professional to identify the underlying cause and receive appropriate treatment[9].
Tracking the menstrual cycle for health insights
Tracking the menstrual cycle can provide valuable information about a woman’s reproductive health and overall well-being. By monitoring cycle length, symptoms, and changes in basal body temperature or cervical mucus, women can gain a deeper understanding of their bodies and identify potential health concerns early on. Additionally, tracking the menstrual cycle can help women plan for pregnancy or avoid unintended pregnancy by identifying fertile days.
The Digestive Cycle: Nutrition and Gut Health
Overview of the digestive cycle
The digestive cycle is a natural process that involves the breakdown of food, absorption of nutrients, and elimination of waste. This cycle is essential for maintaining optimal nutrition and overall health. The digestive system consists of various organs, including the mouth, esophagus, stomach, small intestine, large intestine, and rectum, which work together to process food and extract necessary nutrients[10]. Understanding the digestive cycle is crucial for promoting gut health and preventing digestive disorders.
Stages of the digestive cycle
The digestive cycle can be divided into several stages:
- Ingestion: The process of consuming food and drink.
- Digestion: The breakdown of food into smaller molecules that can be absorbed by the body. This stage involves mechanical digestion (chewing) and chemical digestion (enzymatic breakdown).
- Absorption: The process by which nutrients from digested food are absorbed into the bloodstream through the walls of the small intestine.
- Elimination: The removal of undigested food and waste products from the body through bowel movements[11].
Each stage of the digestive cycle plays a critical role in maintaining optimal nutrition and gut health.
Factors that influence the digestive cycle
Several factors can influence the digestive cycle, including:
- Diet: The types of foods consumed, as well as the timing and frequency of meals, can impact digestive function.
- Hydration: Adequate water intake is essential for maintaining proper digestive function and preventing constipation.
- Stress: Chronic stress can disrupt the digestive cycle, leading to symptoms such as bloating, abdominal pain, and changes in bowel habits.
- Physical activity: Regular exercise can promote regular bowel movements and support overall digestive health.
Gut microbiome and digestive health
The gut microbiome, which consists of trillions of microorganisms living in the digestive tract, plays a crucial role in digestive health. A balanced gut microbiome supports nutrient absorption, immune function, and overall well-being. Factors that can influence the gut microbiome include diet, antibiotic use, and stress[12]. Consuming a diet rich in fiber, fermented foods, and prebiotics can help support a healthy gut microbiome and promote optimal digestive function.
Digestive disorders and their management
Digestive disorders, such as irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and gastroesophageal reflux disease (GERD), can disrupt the digestive cycle and impact overall health. Symptoms of digestive disorders may include abdominal pain, bloating, diarrhea, constipation, and acid reflux. If you experience persistent digestive symptoms, it is essential to consult with a healthcare professional for proper diagnosis and management. Treatment options may include dietary modifications, stress management techniques, and medication, depending on the specific disorder and its severity.
The Sleep-Wake Cycle: Restoring the Body and Mind
The importance of the sleep-wake cycle
The sleep-wake cycle is a critical component of the body’s circadian rhythm, which regulates the timing of sleep and wakefulness. Adequate sleep is essential for physical and mental restoration, cognitive function, and overall health and well-being. During sleep, the body undergoes various processes, such as muscle repair, memory consolidation, and hormone regulation[13]. Maintaining a healthy sleep-wake cycle is crucial for optimal functioning and quality of life.
Stages of sleep
Sleep is divided into two main types: non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep is further divided into three stages:
- Stage 1: The transition from wakefulness to sleep, characterized by light sleep and easy arousal.
- Stage 2: A deeper stage of sleep, characterized by slowed brain waves and decreased heart rate and body temperature.
- Stage 3: The deepest stage of sleep, also known as slow-wave sleep, characterized by the presence of delta waves and a high arousal threshold.
REM sleep, which occurs cyclically throughout the night, is characterized by rapid eye movements, vivid dreams, and temporary muscle paralysis[14]. Each stage of sleep serves a specific purpose in the restoration and maintenance of physical and mental health.
Factors that influence the sleep-wake cycle
Several factors can influence the sleep-wake cycle, including:
| Factor | Impact | |
|---|---|---|
| 1 | Light exposure | Regulates the production of melatonin, a hormone that promotes sleep |
| 2 | Stress and anxiety | Can lead to insomnia and disrupted sleep patterns |
| 3 | Caffeine and alcohol consumption | Can interfere with sleep quality and duration |
| 4 | Electronic device use before bed | The blue light emitted by screens can suppress melatonin production |
Understanding and managing these factors can help promote a healthy sleep-wake cycle and improve overall sleep quality.
Sleep disorders and their management
Sleep disorders, such as insomnia, sleep apnea, and restless leg syndrome, can significantly disrupt the sleep-wake cycle and lead to daytime fatigue, mood disturbances, and impaired cognitive function. If you experience persistent sleep difficulties, it is essential to consult with a healthcare professional for proper diagnosis and treatment[15]. Treatment options may include lifestyle modifications, cognitive-behavioral therapy, and medication, depending on the specific disorder and its severity.
Strategies for promoting a healthy sleep-wake cycle
To promote a healthy sleep-wake cycle, consider implementing the following strategies:
- Maintain a consistent sleep schedule, even on weekends
- Create a relaxing bedtime routine to signal to your body that it’s time to sleep
- Ensure your bedroom is dark, quiet, and at a comfortable temperature
- Avoid caffeine, alcohol, and large meals close to bedtime
- Engage in regular physical activity, but not too close to bedtime
By prioritizing sleep and implementing these strategies, you can support a healthy sleep-wake cycle and promote overall health and well-being.
The Stress Response Cycle: Managing Stress for Better Health
Understanding the stress response cycle
The stress response cycle is a natural physiological reaction to perceived threats or challenges. When faced with a stressor, the body activates the sympathetic nervous system, triggering the release of stress hormones such as cortisol and adrenaline. These hormones prepare the body for “fight or flight” by increasing heart rate, blood pressure, and glucose levels[16]. While the stress response is adaptive in the short term, chronic activation of this cycle can have detrimental effects on physical and mental health.
Stages of the stress response cycle
The stress response cycle consists of three main stages:
- Alarm: The initial stage, in which the body recognizes a stressor and activates the sympathetic nervous system.
- Resistance: The stage in which the body attempts to cope with the stressor and maintain homeostasis. If the stressor persists, the body may adapt to the ongoing demand.
- Exhaustion: If the stressor continues and the body is unable to adapt, it may enter a state of exhaustion, leading to physical and emotional fatigue[17].
Understanding these stages can help individuals recognize the signs of chronic stress and take steps to manage their stress response effectively.
The impact of chronic stress on health
Chronic activation of the stress response cycle can have numerous negative impacts on health, including:
- Increased risk of cardiovascular disease
- Weakened immune function
- Digestive problems
- Sleep disturbances
- Mood disorders, such as anxiety and depression
- Cognitive impairment, including difficulty concentrating and memory issues
Strategies for managing stress
To effectively manage stress and support a healthy stress response cycle, consider implementing the following strategies:
| Strategy | Benefits | |
|---|---|---|
| 1 | Regular exercise | Reduces stress hormones and promotes relaxation |
| 2 | Mindfulness and meditation | Helps regulate emotions and reduces anxiety |
| 3 | Time management | Reduces feelings of overwhelm and increases productivity |
| 4 | Social support | Provides a sense of connection and helps buffer stress[18] |
Incorporating these strategies into daily life can help individuals better manage their stress response and promote overall health and well-being.
When to seek professional help
If stress becomes overwhelming and begins to significantly impact daily functioning, it may be necessary to seek professional help. Signs that it’s time to consult with a mental health professional include:
- Persistent feelings of anxiety, depression, or irritability
- Difficulty sleeping or concentrating
- Physical symptoms, such as headaches or digestive issues, that do not improve with self-care
- Reliance on unhealthy coping mechanisms, such as substance abuse
A mental health professional can help individuals develop personalized strategies for managing stress and addressing any underlying mental health concerns.
Monitoring and Optimizing Natural Cycles for Better Health
The importance of tracking natural cycles
Monitoring natural cycles, such as the menstrual cycle, circadian rhythm, and seasonal changes, can provide valuable insights into overall health and well-being. By tracking these cycles, individuals can identify patterns, anticipate changes, and make informed decisions about their lifestyle and health management[19]. This increased awareness can lead to better self-care practices and improved health outcomes.
Tools and methods for monitoring natural cycles
There are various tools and methods available for monitoring natural cycles, including:
- Menstrual tracking apps: These apps allow users to log their menstrual symptoms, cycle length, and fertility signs, providing personalized predictions and insights.
- Sleep tracking devices: Wearable devices and smartphone apps can monitor sleep patterns, duration, and quality, helping users optimize their sleep habits.
- Mood and symptom journals: Regularly recording mood, energy levels, and physical symptoms can help identify patterns and triggers related to natural cycles.
- Basal body temperature tracking: Monitoring daily basal body temperature can help identify ovulation and hormonal shifts throughout the menstrual cycle.
Optimizing natural cycles for better health
Once patterns and trends in natural cycles have been identified, individuals can take steps to optimize their health and well-being. Some strategies for optimizing natural cycles include:
| Strategy | Benefits | |
|---|---|---|
| 1 | Adjusting sleep schedules | Aligning sleep with natural circadian rhythms can improve sleep quality and daytime functioning |
| 2 | Nutrient timing | Consuming specific nutrients during different phases of the menstrual cycle may help alleviate symptoms and support hormonal balance[20] |
| 3 | Stress management | Practicing stress-reducing techniques can help regulate the impact of stress on natural cycles |
| 4 | Light exposure | Regulating exposure to natural light and minimizing artificial light at night can support healthy circadian rhythms[21] |
By optimizing natural cycles through lifestyle modifications and targeted interventions, individuals can promote better health and overall well-being.
Collaborating with healthcare professionals
While self-monitoring and optimization of natural cycles can be empowering, it is essential to collaborate with healthcare professionals for personalized guidance and support. Healthcare providers can help:
- Interpret cycle data and identify potential health concerns
- Develop customized treatment plans for hormonal imbalances or other cycle-related issues
- Provide guidance on lifestyle modifications and complementary therapies
- Monitor progress and adjust interventions as needed
By working closely with healthcare professionals and incorporating their expertise into self-monitoring practices, individuals can achieve optimal health outcomes and effectively manage their natural cycles.
Embracing Natural Cycles for Holistic Well-being
The mind-body connection
Embracing natural cycles involves recognizing the intricate connection between the mind and body. Our physical health, emotional well-being, and cognitive function are all interconnected and influenced by the natural rhythms that govern our lives. By acknowledging and honoring this mind-body connection, we can cultivate a more holistic approach to well-being that supports overall health and vitality[22].
Aligning with nature’s rhythms
One key aspect of embracing natural cycles is learning to align our lives with the rhythms of nature. This can involve:
- Adjusting our daily routines to sync with the rising and setting of the sun
- Eating seasonally available foods to support our bodies’ natural nutritional needs
- Engaging in outdoor activities to connect with the natural world and benefit from fresh air and sunlight
- Practicing mindfulness and meditation to cultivate a deeper awareness of our inner and outer environments
Cultivating self-awareness and intuition
Embracing natural cycles also involves developing a keen sense of self-awareness and intuition. By tuning into our bodies’ subtle cues and signals, we can gain valuable insights into our unique needs, preferences, and vulnerabilities. This heightened self-awareness can help us make more informed decisions about our health, relationships, and personal growth[23].
Fostering resilience and adaptability
Engaging with natural cycles can foster greater resilience and adaptability in the face of life’s challenges. By recognizing that change is an integral part of the natural world, we can learn to navigate transitions and setbacks with greater ease and grace. Strategies for fostering resilience and adaptability include:
| Strategy | Benefits | |
|---|---|---|
| 1 | Embracing a growth mindset | Viewing challenges as opportunities for learning and personal development |
| 2 | Cultivating social support | Building strong relationships and seeking support during times of stress or transition |
| 3 | Practicing self-care | Prioritizing activities that promote physical, emotional, and spiritual well-being |
| 4 | Developing a sense of purpose | Finding meaning and direction in life, even amidst change and uncertainty[24] |
By cultivating these qualities and practices, we can develop greater resilience and adaptability, allowing us to thrive in the face of life’s cyclical nature.
Embracing a holistic perspective
Ultimately, embracing natural cycles requires a shift towards a more holistic perspective on health and well-being. This involves recognizing the interconnectedness of our physical, emotional, and spiritual selves, as well as our inherent connection to the natural world. By honoring the wisdom of our bodies, the rhythms of nature, and the cyclical nature of life itself, we can cultivate a deeper sense of harmony, balance, and vitality in all aspects of our being.
Frequently Asked Questions
Natural cycles refer to the rhythmic patterns that occur in our bodies and the environment, such as the menstrual cycle, circadian rhythm, and seasonal changes. These cycles play a crucial role in regulating various aspects of our health and well-being, including hormone balance, sleep patterns, and mood. By understanding and aligning with these natural cycles, we can optimize our physical and mental health.
You can track your menstrual cycle using various methods, such as apps, calendars, or journals. By recording your cycle length, symptoms, and fertility signs, you can gain valuable insights into your reproductive health, predict ovulation, and identify any potential issues. Tracking your menstrual cycle can also help you make informed decisions about contraception, pregnancy planning, and overall well-being.
The circadian rhythm is a 24-hour internal clock that regulates various physiological processes, such as sleep-wake cycles, hormone production, and body temperature. Disruptions to the circadian rhythm, such as jet lag or shift work, can lead to sleep disturbances, metabolic issues, and increased risk of certain health conditions. Maintaining a consistent sleep schedule, minimizing exposure to artificial light at night, and engaging in regular physical activity can help support a healthy circadian rhythm.
To optimize your sleep cycle, aim to establish a consistent sleep schedule, going to bed and waking up at the same time each day. Create a relaxing bedtime routine, avoid electronic devices before bed, and ensure your sleep environment is dark, quiet, and comfortable. Engaging in regular physical activity and managing stress through techniques like meditation or deep breathing can also promote better sleep quality.
Seasonal changes can influence our health and well-being in various ways. For example, reduced sunlight exposure during winter months can lead to vitamin D deficiency and seasonal affective disorder (SAD). Seasonal shifts in temperature and humidity can also affect respiratory health, allergies, and skin conditions. By adapting our lifestyle habits, such as diet, exercise, and stress management, to the unique challenges and opportunities of each season, we can support our overall health and well-being.
Managing stress is crucial for supporting your body’s natural stress response cycle. Engage in regular physical activity, practice mindfulness and relaxation techniques, and prioritize self-care activities that promote a sense of calm and balance. Maintain a healthy diet, limit caffeine and alcohol consumption, and seek support from loved ones or a mental health professional when needed. By reducing chronic stress and promoting relaxation, you can help your body maintain a balanced and resilient stress response.
To align your daily routines with nature’s rhythms, try waking up with the sun and minimizing artificial light exposure in the evening. Eat seasonal, whole foods that support your body’s natural nutritional needs, and engage in outdoor activities to connect with nature and benefit from natural light and fresh air. Practice mindfulness and meditation to cultivate a deeper awareness of your inner and outer environments, and adjust your schedule to allow for periods of rest and renewal in alignment with your body’s natural cycles.
Understanding your natural cycles can empower you to make better health decisions by providing valuable insights into your unique needs and patterns. By tracking your menstrual cycle, you can identify hormonal fluctuations and adjust your diet, exercise, and self-care practices accordingly. Monitoring your sleep and energy levels can help you optimize your daily routines and make informed choices about work, social commitments, and personal priorities. Ultimately, tuning into your body’s natural cycles allows you to develop a more personalized and proactive approach to your health and well-being.
Reference list
- Beery, A. K., & Zucker, I. (2011). Sex bias in neuroscience and biomedical research. Neuroscience & Biobehavioral Reviews, 35(3), 565-572.
- Tannenbaum, C., Ellis, R. P., Eyssel, F., Zou, J., & Schiebinger, L. (2019). Sex and gender analysis improves science and engineering. Nature, 575(7781), 137-146.
- Tschakert, G., & Hofmann, P. (2013). High-intensity intermittent exercise: methodological and physiological aspects. International Journal of Sports Physiology and Performance, 8(6), 600-610.
- Billaut, F., & Buchheit, M. (2013). Repeated-sprint performance and vastus lateralis oxygenation: effect of limited O2 availability. Scandinavian Journal of Medicine & Science in Sports, 23(3), e185-e193.
- Gibala, M. J., Little, J. P., Macdonald, M. J., & Hawley, J. A. (2012). Physiological adaptations to low-volume, high-intensity interval training in health and disease. The Journal of Physiology, 590(5), 1077-1084.
- Burgomaster, K. A., Howarth, K. R., Phillips, S. M., Rakobowchuk, M., Macdonald, M. J., McGee, S. L., & Gibala, M. J. (2008). Similar metabolic adaptations during exercise after low volume sprint interval and traditional endurance training in humans. The Journal of Physiology, 586(1), 151-160.
- Baker, J. S., McCormick, M. C., & Robergs, R. A. (2010). Interaction among skeletal muscle metabolic energy systems during intense exercise. Journal of Nutrition and Metabolism, 2010, 905612.
- Sahlin, K. (2014). Muscle energetics during explosive activities and potential effects of nutrition and training. Sports Medicine, 44(2), 167-173.
- Jeukendrup, A. E. (2011). Nutrition for endurance sports: marathon, triathlon, and road cycling. Journal of Sports Sciences, 29(sup1), S91-S99.
- Burke, L. M., Hawley, J. A., Wong, S. H., & Jeukendrup, A. E. (2011). Carbohydrates for training and competition. Journal of Sports Sciences, 29(sup1), S17-S27.
- Kerksick, C. M., Arent, S., Schoenfeld, B. J., Stout, J. R., Campbell, B., Wilborn, C. D., … & Antonio, J. (2017). International society of sports nutrition position stand: nutrient timing. Journal of the International Society of Sports Nutrition, 14(1), 1-21.
- Aragon, A. A., & Schoenfeld, B. J. (2013). Nutrient timing revisited: is there a post-exercise anabolic window?. Journal of the International Society of Sports Nutrition, 10(1), 1-11.
- Cintineo, H. P., Arent, M. A., Antonio, J., & Arent, S. M. (2018). Effects of protein supplementation on performance and recovery in resistance and endurance training. Frontiers in Nutrition, 5, 83.
- Witard, O. C., Jackman, S. R., Breen, L., Smith, K., Selby, A., & Tipton, K. D. (2014). Myofibrillar muscle protein synthesis rates subsequent to a meal in response to increasing doses of whey protein at rest and after resistance exercise. The American Journal of Clinical Nutrition, 99(1), 86-95.
- Areta, J. L., Burke, L. M., Ross, M. L., Camera, D. M., West, D. W., Broad, E. M., … & Coffey, V. G. (2013). Timing and distribution of protein ingestion during prolonged recovery from resistance exercise alters myofibrillar protein synthesis. The Journal of Physiology, 591(9), 2319-2331.
- Res, P. T., Groen, B., Pennings, B., Beelen, M., Wallis, G. A., Gijsen, A. P., … & Van Loon, L. J. (2012). Protein ingestion before sleep improves postexercise overnight recovery. Medicine and Science in Sports and Exercise, 44(8), 1560-1569.
- Snijders, T., Res, P. T., Smeets, J. S., Van Vliet, S., Van Kranenburg, J., Maase, K., … & Van Loon, L. J. (2015). Protein ingestion before sleep increases muscle mass and strength gains during prolonged resistance-type exercise training in healthy young men. The Journal of Nutrition, 145(6), 1178-1184.
- Refinetti, R., Lissen, G. C., & Halberg, F. (2007). Procedures for numerical analysis of circadian rhythms. Biological Rhythm Research, 38(4), 275-325.
- Thackray, A. E., Deighton, K., King, J. A., & Stensel, D. J. (2016). Exercise, appetite and weight control: are there differences between men and women?. Nutrients, 8(9), 583.
- Draper, C. F., Duisters, K., Weger, B., Chakrabarti, A., Harms, A. C., Brennan, L., … & Van Der Greef, J. (2018). Menstrual cycle rhythmicity: metabolic patterns in healthy women. Scientific Reports, 8(1), 1-15.
- Boivin, D. B., Duffy, J. F., Kronauer, R. E., & Czeisler, C. A. (1996). Dose-response relationships for resetting of human circadian clock by light. Nature, 379(6565), 540-542.
- Adan, A., Archer, S. N., Hidalgo, M. P., Di Milia, L., Natale, V., & Randler, C. (2012). Circadian typology: a comprehensive review. Chronobiology International, 29(9), 1153-1175.
- Fletcher, D., & Sarkar, M. (2013). Psychological resilience: A review and critique of definitions, concepts, and theory. European Psychologist, 18(1), 12-23.
