Thread by @nick_krontiris

In this one in middle-aged Japanese individuals, body cell mass, a metabolically active component of Fat-Free Mass and a representative biomarker of muscle cell mass, was associated cardiorespiratory fitness, as measured by V'O2peak.

- Fat-free mass (FFM) is a heterogeneous compartment comprising body cell mass (BCM), intracellular water (ICW), extracellular solids, and extracellular water (ECW).

- Fat-free mass (FFM), considering as a metabolically active compartment of the human body, is often used to adjust for differences in resting or exercise-state energy metabolism, including maximal oxygen uptake (V'O2peak), to account for body composition.

- Fat-free mass is composed of water, minerals, and proteins that do not expend energy, which include body cell mass (BCM), extracellular solids (ECS), and extracellular water (ECW).

- Body cell mass is a fundamental and metabolically active component of fat-free mass related to muscle cell mass.

- Although body cell mass is correlated with fat-free mass, and the average BCM/FFM ratio is ~0.58, this can vary among individuals depending on age, medical status, and obesity.

- This is the first study to examine the association between the BCM/FFM ratio, ECW/ICW ratio, and V'O2peak.

- V'O2peak was found to have a negative correlation with age.

- Body cell mass and intracellular water also showed negative correlations with age.

- The BCM/FFM ratio showed a negative correlation, whereas the ECW/ICW ratio showed a positive correlation with age.

- Explosive leg muscle power was associated with V'O2peak.

- The BCM/FFM ratio was associated with both the absolute and relative values of V'O2peak.

- Both the BCM/FFM and ECW/ICW ratios were associated with V'O2peak.

- Similar to previous studies, objectively measured physical activity such as moderate and vigorous physical activity were also associated with V'O2peak.

- In English:

- "These results suggest that V'O2peak is partly determined by BCM and that individual differences in FFM composition (i.e., the BCM/FFM or ICW/ECW ratios) are essential determinants of V'O2peak."

- "Furthermore, objectively measured PA and explosive leg muscle power were significant predictors of V'O2peak in non-athletic middle-aged adults independent of BCM."

Body cell mass to fat-free mass ratio and extra-to-intracellular water ratio are related to maximal oxygen uptake

doi.org/10.1093/gerona…

#nutrition #diet #exercise #Workout #TrainHard #GymLife #GymTime #muscle #strength #lift #GetStrong #cardio #hiit