Have you ever started a fitness journey and started to see some incredible results, only to hit a harsh plateau with no explanation? Or perhaps you’ve made all the changes required to prime your body for weight loss, yet no results? Believe it or not, your hormones play a significant role in either supporting and accelerating your goals, or hindering them. And the latter is much more common than you may realise.
So, the question must be asked: How much do you really understand about your hormones? What they do and how they influence your metabolism? The role they play in progressing or stunting your fat loss or muscle growth? Let’s be honest, the answer is most likely very few of us. So, let’s take a closer look at three key hormones that affect both men and women: Cortisol, Human Growth Hormone, and Thyroid Hormones.
But first, what on earth are hormones? According to the Hormone Health Network, hormones are chemical substances that act as messengers to signal reactions within your body to carry out functions to cells and/or tissues. As such, hormones impact many different processes in your body, including growth, metabolism, sexual function, reproduction and mood.
Cortisol
You don’t have to be a hormone expert to have heard of the word ‘cortisol’. Whether it’s through Facebook or media publications, ‘stress’ has become the hottest buzzword of this decade, and for a legitimate reason. Did you know – According to the World Health Organisation, stress is the health epidemic of the 21st century!
Yet, despite the negative rap it gets, cortisol is extremely important to survival and is certainly not as bad as it’s made out to be. Wondering why? Cortisol is essentially nature’s built-in alarm system and is best known for controlling your body’s fight or flight instinct. Cortisol works with parts of your brain to influence your mood, motivation, and fear.
But, what exactly is cortisol? Cortisol is a hormone (also known as the stress hormone), which is generally released during times of stress. However, cortisol is not only known for stress. As most of the cells in your body have cortisol receptors, it plays an important role in various functions (You and Your Hormones, 2019). As such, cortisol helps to:
- Regulate your metabolism
- Influence memory formation
- Act as an anti-inflammatory
- Control salt and water balance
- Support the growth of a foetus during pregnancy
How does Cortisol work?
Your hypothalamus and pituitary gland (which are both located in your brain) can detect if the correct level of cortisol is in your brain. If the level is too high or low, your brain will generally make adjustments to the number of hormones it’s producing. As a result, your adrenal glands adapt and adjust the amount of cortisol they release, accordingly.
Likewise, your cortisol receptors may have different hormone requirements each day, meaning what and how they receive these hormones may vary daily. For example – If your body is highly stressed or perceives a threat, cortisol may adjust or stop other functions that interfere, such as your digestive or reproductive systems, your immune system, or even your growth processes.
What happens when you produce too much or too little Cortisol?
If your body is producing too much cortisol, you may experience the following symptoms¹:
- Chronic conditions – ie high blood pressure, type 2 diabetes, and osteoporosis
- Weight gain (particularly around the face and abdomen) – Cortisol increases appetite and sends signals to the body to store fat.
- Mood swings – Generally shown as anxiety, depression or irritability
- Impaired brain function – Cortisol interferes with memory, resulting in brain fog
- Infections – When cortisol is high, it can impact and compromise your immune system, which makes you more susceptible to infection and illness.
If your body’s producing too little cortisol, you may experience the following symptoms:
- Ongoing tiredness
- Dizziness
- Weight loss
- Weakened muscles
- Mood changes
Note: Without treatment, having too much or too little cortisol are potentially life-threatening conditions and should be treated immediately. If you suspect you fall into either of these categories, we urge you to seek medical attention.
Human Growth Hormone
Human Growth Hormone (HGH) is a small protein produced in part of the brain (known as the ‘pituitary gland’) every few hours and more frequently during sleep, particularly our non-REM sleep (Better Health Channel 2019). HGH is responsible for stimulating growth by travelling to all tissues in the body via the bloodstream.
But, how important is HGH? Well, to put it straight – A lack of HGH is suggested to cause slower growth in children and also hinder health and fitness progress for adults (Health Direct 2018). In fact, did you know that growth hormone plays an important role in influencing your height, and helping build your bones and muscles? When secreted, HGH is responsible for stimulating smaller protein hormones that help the following actions and reactions occur in the body:
- The growth and/or maintenance of muscle and bone
- Enhanced tissue repair and skin/injury healing
- The breakdown of fatty acids in the adipose tissue to be used for ATP production
- The regulation of glucose to be used as energy and reserved for times of shortage
There’s no denying that HGH is vital to your overall health and day-to-day functionality, and when it comes to reaching your health and fitness goals, it can either progress your results or hinder them. For instance, according to Better Health Channel, those with growth hormone deficiency may experience a variety of symptoms, including poor bone density, reduced muscle mass, fatigue, depression, poor memory, and increased body fat around the waist.
What can you do to promote the secretion of HGH? Try incorporating the following tips:
- Get serious about your sleep – Non-rapid eye movement sleep, more commonly known as deep sleep, is important for secreting healthy levels of HGH. Try aim for 6-9 hours of sleep per night, if possible.
- Prioritise exercise and lower stress – Try to minimise the amount of stress in your life, and incorporate more exercise to maintain healthy HGH levels (but not too much).
- Keep an eye on other hormones – Other hormones may also play a role in stimulating HGH levels, including insulin, oestrogen, and cortisol. We recommend that you consult your health professional to assess your hormones, should you have concerns or queries.
Additionally, it’s important to be aware that sleep deprivation, a lack of protein and amino acids, an unhealthy amount of fatty acids in your diet, hypothyroidism and obesity can also decrease the production of HGH in your body.
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