Two recent studies found that testosterone levels are associated with strength and cardiovascular fitness. This is not surprising, but confirmation of "common sense" is still helpful.
The first study found that lower testosterone levels are associated with frailty in older men:
Serum free testosterone concentration was associated with frailty, physical function, sarcopenia and muscle mass as well as with changes in these outcomes over 12 months. Testosterone replacement may be a feasible therapeutic target toward prevention of frailty.
The second study found that testosterone is associated with higher VO2 Max, a measure of cardiovascular fitness:
The partial correlation coefficients between RTL [resting testosterone levels] and BF% [body fat %] controlling for VO2 max were significant in the normal and all participants group. When RTL and VO2max were analyzed controlling for BF% only the all participants group remained significant.
The study authors think that improved fitness increases testosterone and not the reverse:
Cardiovascular fitness or weight status may independently influence RTL in males.
The first study found that lower testosterone levels are associated with frailty in older men:
Serum free testosterone concentration was associated with frailty, physical function, sarcopenia and muscle mass as well as with changes in these outcomes over 12 months. Testosterone replacement may be a feasible therapeutic target toward prevention of frailty.
The second study found that testosterone is associated with higher VO2 Max, a measure of cardiovascular fitness:
The partial correlation coefficients between RTL [resting testosterone levels] and BF% [body fat %] controlling for VO2 max were significant in the normal and all participants group. When RTL and VO2max were analyzed controlling for BF% only the all participants group remained significant.
The study authors think that improved fitness increases testosterone and not the reverse:
Cardiovascular fitness or weight status may independently influence RTL in males.
