HRV (Heart Rate Variability) is the measurement of the variation in time (in milliseconds) between two consecutive heartbeats.
A high HRV reflects the autonomic nervous system's ability to switch flexibly between "stress" mode (sympathetic) and "recovery" mode (parasympathetic). Therefore, HRV is an excellent indicator of the overall stress level our body is facing.
There is also a direct link between HRV, sleep quality, and depression [1] [2]. HRV influences sleep, and sleep influences HRV. Indeed, better sleep quality increases HRV and lowers the resting heart rate the following day. Conversely, a high HRV improves sleep quality—especially deep sleep—the following night.
Several studies also link HRV to depression; individuals experiencing depression often have low HRV. A low HRV is frequently a sign of a "loss of vagal flexibility." Essentially, the body stays stuck in "survival" mode (sympathetic) and can no longer activate the "brake" (parasympathetic) to soothe itself. This explains why one might feel less depressed when HRV improves: the body has regained its physiological ability to calm down. It is, therefore, a strong indicator of resilience [3].
You don’t need medical-grade equipment to monitor your HRV. It can be measured with almost any modern smartwatch or fitness tracker, such as Apple Watch, Fitbit, Samsung Galaxy Watch, Garmin, or Whoop for example.
This is anecdotal, but I experienced it recently. I lately implemented a system to increase my HRV. I am 36 years old, and I went from approximately 50 ms to 70 ms in one week. And indeed, although I don't necessarily feel like I'm sleeping better, I am slightly less tired and, above all, less depressed.
It remains to be seen if this trend continues over time and if I can maintain this value, which I suspect will not be an easy task.
So, how do you increase your HRV in practice?
Even if you are thin and looking to gain weight, do not force yourself to overeat. This will lower your HRV, which in turn lowers your sleep quality and, eventually, reduces your digestive capacity. It becomes a vicious cycle of metabolic stress. If the body spends the night digesting, it isn't spending the night repairing the nervous system.
You can create a virtuous cycle: eating slightly below your maximum digestive capacity increases HRV, which improves sleep quality and, ultimately, boosts your digestive capacity the next day.
HRV is a reliable indicator of physical stress and is very useful for monitoring your general health. To give you an idea of typical values, here is a chart showing HRV relative to age.
Custom prostheses are made from the same material as the standard versions and follow the same overall design. I design it based on your ct-scan.
Nasal dilator designed for nasal obstruction like:
Still made with transparent, soft and certified biocompatible material with mucosa.
This nasal tube prosthesis is specially designed for people who have had a complete resection of their inferior turbinates.
The maximum diameter of the tube is 6 mm.
This prosthesis is made of rods with V-shaped ends that allow for easy insertion into the nasal cavity. The wings of the V fold during passage through the anterior part and unfold in the inferior meatus.
This prosthesis is made up of rods with half cylinders at the ends, each 4 mm or 3 mm in diameter and 21 mm long. You can trim the parts that seem too large to you with a cutter.
Brand Names: Cozaar.
Definition: Losartan is a medication belonging to the angiotensin II receptor blocker (ARB) class, primarily used to treat hypertension (high blood pressure) and to protect the kidneys from damage caused by diabetes. It works by blocking the binding of angiotensin II to its receptors, which prevents blood vessels from narrowing and promotes vasodilation, thereby lowering blood pressure and improving blood flow. Additionally, it is frequently prescribed to reduce the risk of stroke in patients with high blood pressure and left ventricular hypertrophy, and to slow the progression of diabetic nephropathy in patients with type 2 diabetes.
Definition: L-glutamine is the most abundant amino acid in the body, serving as a critical building block for proteins and a primary fuel source for immune and intestinal cells. It plays a key role in nitrogen transport and acid-base balance while helping to maintain the integrity of the intestinal barrier. It is frequently used by athletes to promote muscle recovery and prevent catabolism, as well as by individuals seeking to support gut health and immune function.
Definition: Zinc is an essential trace mineral involved in numerous aspects of cellular metabolism, including immune function, protein synthesis, and cell division. It acts as a catalyst for more than 300 enzymes and plays a vital role in DNA synthesis, wound healing, and normal growth and development. It is widely used as a supplement to boost immune response, support skin health, and protect cells from oxidative stress.
Definition: Omega-3 fatty acids are essential polyunsaturated fats, primarily alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA), which the body cannot produce on its own. They play a crucial role in maintaining cardiovascular health by reducing triglycerides and systemic inflammation while supporting the structural integrity of cell membranes in the brain and retina. These supplements are widely used to improve cognitive function, manage joint stiffness in inflammatory conditions, and support overall heart health.
