Another factor is the growth of muscles and ligaments. Testosterone increases the density of your bones, which makes them slightly heavier. Heavier bones need stronger muscles for movement and activity. The ligaments and tendons which connect your muscles to bone need to be thicker and stronger to cope with the increase of muscle. Ligaments and tendons are wrapped around bones and joints and as they become thicker and stronger, there can be an overall impression of growth, height and size.
Your feet and hands, are made up of many many small joints and bones which are wrapped in ligaments. The growth of any tendons and muscles can cause your bones to sit slightly differently alongside each other and in this case, a larger shoe size (or glove size?) can be more comfortable given the changes to your ligaments and tendons. There can also be a slightly thickening of ligaments along your spine.
Overall, these factors together can contribute to a feeling of ‘growth’ or height.
If you have been treated with puberty-delaying treatment or you start testosterone before your growth plates (Epiphyseal plates) have closed off – for example, at 12 or 13 years of age, your normal growth process applies into your late teens.
However, if you start testosterone after puberty, the growth plates (Epiphyseal plates) at the ends of your leg bones have sealed off. It is these growth plates that give you height. They will not magically ‘re-open’ just because you start testosterone treatment.
- Your long bones (in your arms and legs) won’t grow any longer on testosterone.
- Your feet, hands and skull are not going to grow bigger.
- If you have a wide pelvis, it isn’t going to become small and slender.
- Your height will remain pretty much the same according to your genetic heritage.
- If you are on the shorter side before testosterone treatment, you’ll still be in the short range once you’ve been through transition.