The age-related loss of skeletal muscle mass and function: Measurement and physiology of muscle fibre atrophy and muscle fibre loss in humans

madman

Super Moderator
4. Conclusions

The present review details the major two influences on the loss of muscle mass and function with age: muscle fiber atrophy and muscle fiber loss. It is reasonably clear that both of these elements play a role in regulating muscle atrophy and dysfunction at the level of whole muscle/ groups. Nevertheless, few if any research groups focus upon both of these facets simultaneously in humans, nor the prospect of them being interrelated processes (denervation leading to atrophy and/or vice-versa). While this presents experimental challenges, only will investigating these processes simultaneously shed light on the mechanisms of human sarcopenia and dysfunction.
 

Attachments

hCG Mixing Calculator

HCG Mixing Protocol Calculator

TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

Beyond Testosterone Podcast

Online statistics

Members online
2
Guests online
315
Total visitors
317

Latest posts

Back
Top