The “No Pain, No Gain” Myth Trap
Try to observe your routine. For example, you run regularly. You will usually run straight to the limit, until you are very panting, or until your chest already hurts, already tight. Because indeed we usually have the understanding: “No pain, no gain”. In fact, sometimes you might feel proud because you can push yourself to the limit. However, after months of routinely “torturing yourself”, does your running pace (speed) immediately improve? Many of us do not, right? Instead, our progress might slow down because we are tired too often. Why can it be like that? Why do you still run out of breath just because you climb three steps of stairs at the office?
The answer is ironic, it turns out all this time you have been training the body’s energy system in the wrong way. Pushing the heart rate at high intensity continuously (zone 3 or 4), will only burn instant sugar reserves and increase lactic acid production which can trigger muscle aches. You force the body to work in the “red zone” without ever building its stamina foundation. As a result, you continuously experience fatigue, and your cardiopulmonary capacity does not experience a meaningful increase.
“Pouring sweat and panting breath are not indicators of improving fitness, but rather signs that your body’s engine is panicking to borrow emergency energy sources.”
Zone 2 and the Fat Burning Factory
In the science of Longevity Medicine, the best way to build prime heart capacity is actually with a relaxed exercise intensity. This method is called Zone 2 cardio. Practically, Zone 2 is an exercise intensity where the heart rate is in the range of 60-70% of the maximum limit. The easiest benchmark is the talk test, if you can still exercise while talking at length without fatigue, it means you are in zone 2. Usually the exercise is in the form of relaxed jogging or cycling. Feels boring? Of course! That is exactly how it should be.
“If VO2 Max is the magnificent roof of a house, then low-intensity exercise is its foundation. You cannot build a high roof on a fragile foundation.”
Behind this slow intensity, a miracle at the cellular level is happening. Zone 2 exercise specifically targets Type 1 (slow-twitch) muscle fibers and triggers Mitochondrial Biogenesis. It means your muscle cells are forced to multiply and enlarge their energy factories (mitochondria). Extraordinarily, Zone 2 trains those mitochondria to stop demanding glucose, then switch to burning fat as the main energy source. This is the real fat-burning engine, as well as the main protector of your vital organs from the fatigue that usually appears when exercising intensely.
Science Prescribes Patient Exercise
The shift from torturous exercise to Zone 2 is not just a trend, but a clinical foundation validated by global physiology experts:
- The Secret of World Champions: A systematic review and meta-analysis published in the journal Sports Medicine (Andrade et al., 2024) dissected the training patterns of elite marathon athletes. Researchers found the “80/20” golden rule. These “monster” stamina athletes spend 80% of their training time in the very slow Zone 2, and only 20% at high intensity. This giant mitochondrial foundation is the key to their limitless endurance.
- Curing Metabolic Dysfunction: Cardiology expert, Dr. Iñigo San-Millán, in his publication in the journal Sports Medicine (San-Millán and Brooks, 2020) confirmed that Zone 2 is very effective in curing metabolic dysfunction. This training remodels the cell’s ability to clear lactic acid and absorb oxygen, clinically restoring the muscle function of type 2 diabetes sufferers to resemble healthy individuals.
- Preventing Muscle Shrinkage: A study regarding microscopic muscle adaptation published in the journal Sports Medicine (Lundby et al., 2024) proved that training volume (duration at low intensity), not high intensity, can actually increase the amount of mitochondrial protein in the muscle. The more mitochondria you build through Zone 2, the further you are from the risk of losing muscle mass (sarcopenia) in old age.
Now, Are You Willing to Lower Your Ego?
It turns out, our biggest obstacle is actually our own ego. We often feel: “ah I can do it, why should I run at pace 9?” Running very slowly and being overtaken by others does sometimes lower our self-esteem. However, current research guarantees that it is exactly that slow but consistent rhythm that is capable of increasing your heart and lung capabilities. Torturing yourself recklessly only triggers joint injuries and faster cellular aging. Tomorrow, when you want to start running, try to think about it carefully again: Are you going to run as fast as possible just for the sake of ego and then end up exhausted, or do you dare to lower your speed, breathe comfortably, and start building a foundation for your heart and lungs that is more prime?
“Exercise for a long life is not about how fast you are today, but rather ensuring you are still able to run without pain twenty years from now.”
Cardiorespiratory health is not just about stamina, because it is the most accurate predictor predicting your biological age. So that you can get the best info and a measurable training plan, Previ Longevity facilitates Metabolic Analysis using the latest technology to find out your metabolic function and make the right planning.
REFERENCES
- Andrade, A., et al. (2024) ‘Comparison of Polarized Versus Other Types of Endurance Training Intensity Distribution on Athletes’ Endurance Performance: A Systematic Review with Meta-analysis’, Sports Medicine, 54(9), pp. 1205-1222.
- Lundby, C., et al. (2024) ‘Effects of Exercise Training on Mitochondrial and Capillary Growth in Human Skeletal Muscle: A Systematic Review and Meta-Regression’, Sports Medicine, 54(7), pp. 845-862.
- San-Millán, I. and Brooks, G. A. (2020) ‘Assessment of Metabolic Flexibility by Means of Measuring Blood Lactate, Fat, and Carbohydrate Oxidation Responses to Exercise in Professional Endurance Athletes and Less-Fit Individuals’, Sports Medicine, 50(2), pp. 467-479.
