Parallel to the weight training has made you rough, bad or not, the practice of this subject makes people dwarf is also a problem that many people have to worry about.
Coach Trang Le (Hanoi) said that this is probably the sentence she hears most when talking about training. It is common sense that this is understandable: placing a heavy weight on the shoulders can prevent bone growth and endanger the spine.
"As far as I know, there has been a great deal of scientific research and there is no conclusions that support this widely believed" hypothesis. " is the exact opposite. I would like to point out three studies stored in NCBI (US National Center for Biotechnology Information), "said coach Trang Le. As follows:
1. Research on Bone Mineral Density - BMD (bone mineral density) and Bone Mineral Content - BMC (bone mass) by Department of Kinesiology, McMaster Uni, Canada.
In this experiment, a group of teenage girls performed resistance training (RT-weight training) including Squat for 26 weeks. Results from measurement tools have two notable things. Firstly, RT absolutely does not cause any adverse effects on the backbone, bone mineral content (BMC) or bone mineral density (BMD).
Second, all of these indicators have increased in a positive direction. This means that the Squat process not only increases strength, but also increases bone strength, minimizes the risk of future injuries and supports development, not vice versa.
Squat not only increases strength, but also increases bone strength, minimizing the risk of injury.
2. Research on the impact of force (from dumbbells) on the backbone is conducted by Surgical Neurology Branch, National Institutes of Health, USA
The premise is hypothetical: a large force exerted on the backbone can be dangerous and lead to fractures. To verify, the scientists conducted experiments against the person who holds the world record for Squat (man) with a weight of> 469kg. All indicators can be measured to produce positive results: BMD reached the highest level.
At that time, there was absolutely no effect on the body, including testosterone levels. Meanwhile, the force on which this person's spine is subjected to double the force exerted by the original hypothesis. Thus, it can be concluded that: Squat does not have any negative effects on bone and health.
3. Research on the effect of weight training on bone density of young men by the Department of Epidemiology, National Institute for Longevity Science, Japan
This experiment was performed on 10 men who had lifted weights. Again, the conclusions are identical to the two experiments, which means that there is a strong positive impact of weight training on the strength and strength of bones, not just the backbone but the whole body.
"Therefore, weight training makes us dwarfs completely unfounded. However, it must be asserted that only when exercising properly can we have positive effects, and wrong training will certainly be. injury and no muscle growth , "coach Trang Le said.
It should be added that the height of each person is regulated 60-80% due to genes, 20-40% due to external factors such as environment, nutrition . This indicates that the height depends greatly on the properties. Genetic and depends on each ethnic group / gender.
Queensland Institute of Medical Research in Australia has concluded the genetics of height is 80% based on 3375 twins and siblings in Australia. In the US, this number is also 80% for whites. In Finland 78% for men and 75% for women based on 8798 twins.
For Asians, based on data from 385 Chinese families, genetics only make up 65% of the height decision. Even so, the dependence on environmental factors only makes a difference of about 3 cm from the calculated height.
However, due to the current factors such as nutrition, climate . are heavily influenced by humans, the impact of the external environment on genes is relatively large. Even so, the above conclusion has not changed much. Therefore, if you want to lift weights but are worried about losing height, you can rest assured this is unfounded!