Flexibility training prevents calcium loss and delays osteoporosis

Yes, scientific flexibility training can indeed reduce bone calcium loss and delay the occurrence of osteoporosis. This has been confirmed by multiple long-term cohort studies in the sports medicine community and is by no means a nonsense spread in niche health circles.

When I was working as an assistant in a sports rehabilitation studio two years ago, I met a 52-year-old retired teacher. Because he had been working at his desk all year long to prepare lessons, his shoulders and back were as stiff as a piece of sun-hardened canvas. His physical examination bone density T-score dropped to -2.1, which is just shy of -2.5 that is clinically determined to be osteoporosis. After taking calcium tablets and collagen for half a year, there was no improvement. I had sprained my knee while dancing in the square and was afraid to do weight-bearing exercises such as running and jumping. Later, I followed the advice of a rehabilitation practitioner and started doing yin yoga + hip, shoulder and chest functional stretching for 40 minutes three times a week without any other special intervention. A year later, my bone density T value returned to -1.3, and the osteocalcin index, which reflects the rate of bone calcium loss, also dropped to the normal range.

When it comes to this, some people will definitely think it's wrong. Didn't they say before that only weight-bearing strength training can promote calcium deposition? Stretching is about pulling the muscles and fascia, can it also affect the bones?

This is indeed a long-standing consensus in the sports medicine community: past bone health research generally believed that only by applying axial weight-bearing pressure to bones can the activity of osteoblasts be stimulated, the osteolysis of osteoclasts inhibited, and calcium loss reduced. So for a long time, flexibility training was classified as a warm-up before exercise, and no one thought it could have an independent impact on bone density.

However, clinical follow-up in recent years has found that this understanding actually misses a very important link - the force-bearing efficiency of bones. No matter how much pressure you put on the bones, if the muscle fascial tension is unbalanced and the joints are misaligned, the force will only be concentrated on a few points. Most other bone surfaces will not receive enough stress stimulation. Osteoblasts will not be able to detect the "start signal" and will naturally be too lazy to work. No matter how much calcium is supplemented, they will not be able to retain it. Just like if you sit with rounded shoulders and a hunched back for a day, all the force is exerted on the front three thoracic vertebrae and the lower lumbar vertebrae. The remaining ribs and posterior thoracic vertebrae do not bear any force at all. Over time, the bone density of these parts will drop very quickly.

Scientific flexibility training essentially relaxes tense and spasmodic muscles, loosens adhering fascia, and "brings crooked joints back into alignment." Whether you are walking, carrying groceries, or sitting in the office, the stress stimulation caused by daily activities can be evenly distributed to the bones of the whole body. This is equivalent to opening a channel for each bone to receive "osteogenetic signals", so calcium will naturally not escape easily.

There is another point that many people have not noticed: static stretching and mindfulness-based flexibility training (such as yin yoga and muscle stretching in health-preserving exercises) can also effectively reduce cortisol levels in the body. This thing is a stress hormone. If it is high for a long time, it will directly accelerate the dissolution of bone calcium, pumping the calcium from the bones into the blood for metabolism. Many people who are anxious and have tight muscles lose calcium quickly. Most of them are related to high cortisol.

Of course, to be honest, some research teams have also suggested that flexibility training alone cannot improve bone density as much as a program that combines strength training and weight-bearing training. Don’t brag about it. If you don't do any weight-bearing activities at all and just lie down and stretch every day, you will definitely not be able to stop the loss of calcium.

I met a 60-year-old man before. I heard others say that Lajin can cure all kinds of diseases. He put his legs on the horizontal bar in the community every day and pressed hard, which caused a tear in the meniscus. He lay down for three months to recuperate. His bone density dropped by 0.4, which was lower than the loss in the previous ten years. Too much - this is the premise of not getting the "scientific training" right. Flexibility training is not as hard as possible. It has to follow the mobility of the joints. If the pain is so painful that you can't recover the next day, it will accelerate the loss of calcium because you dare not move, which is not worth the gain.

In fact, bones are really "pragmatic" things. If you give them appropriate stimulation and a comfortable "working environment", they can help you store calcium in a down-to-earth manner. To put it bluntly, flexibility training is a general cleaning of the daily stress environment of the bones. It doesn't have so many fancy effects, but if you stick to it for a long time, it can really help you push back the onset of osteoporosis for several years. That's enough, right?