A Comparison of V̇O2, and Muscle and Prefrontal Cortex Tissue Oxygen Extraction Between Short and Long-term Aerobically Trained Men Aged 40 - 60 Years

Authors

Gavin Buzza, Charles Sturt UniversityFollow

Abstract

International Journal of Exercise Science 13(3): 964-978, 2020. This study was designed to compare systemic O₂ utilization (V̇O₂), and changes in tissue O₂ extraction [deoxyhemoglobin (ΔHHb)] in the vastus lateralis (VL), gastrocnemius (GAST) and pre-frontal cortex (PFC) tissue; between aerobically short-term trained (STT) and long-term trained (LTT) older men (40 - 60 yr) who were matched for current training load. On separate occasions, 14 STT and 14 LTT participants completed ramp incremental (RI) and square-wave constant load (SWCL) tests on a cycle ergometer. In LTT compared to STT; (i) V̇O₂ was higher during the RI (p > 0.001) and SWCL (p > 0.001) tests, (ii) ΔHHb in the GAST was greater in SWCL (p = 0.011); and (iii) ΔHHb in the PFC was greater at 90% GET during SWCL (p = 0.011). The additional years of training in LTT compared to STT (LTT 17.50yr ± 6.94yr vs STT 1.68yr ± 0.31yr) were associated with higher V̇O_2peak, and sub- GET V̇O₂,and ΔHHb in the GAST and PFC at sub- GET exercise, despite there being no difference in current training volume.

Recommended Citation

Buzza, Gavin (2020) "A Comparison of V̇O2, and Muscle and Prefrontal Cortex Tissue Oxygen Extraction Between Short and Long-term Aerobically Trained Men Aged 40 - 60 Years," International Journal of Exercise Science: Vol. 13 : Iss. 3, Pages 964 - 978.
Available at: https://digitalcommons.wku.edu/ijes/vol13/iss3/11