Exercise Responses to Gravity-Independent Flywheel Aerobic and Resistance Training

Aerospace Medicine and Human Performance
Tomasz OwerkowiczGregory R Adams

Abstract

Although several exercise systems have been developed to mitigate the physiological deconditioning that occurs in microgravity, few have the capacity to positively impact multiple physiological systems and still meet the volume/mass requirements needed for missions beyond low Earth orbit. The purpose of this study was to test the gravity-independent Multi-Mode Exercise Device (M-MED) for both resistance (RE) and aerobic (AE) training stimuli. Eight men and nine women (mean age 22.0 ± 0.4 yr) completed 5 wk of training on the M-MED: RE 4 × 7 squats 2 d/wk, and AE 4 × 4-min rowing bouts at ∼90% Vo2max 3 d/wk. Pre- and post-training data collection included an aerobic capacity test, MR imaging, strength testing, and vastus lateralis muscle biopsy. Vo2max increased 8%, 3RM strength 18%, and quadriceps femoris cross-sectional area (CSA) 10%. Knee extensor strength increased at all isokinetic speeds tested. Subjects also demonstrated improved fatigue resistance in knee extension. At the cellular and molecular level, the biopsy revealed increases in mixed myofiber CSA (13%), citrate synthase activity (26%), total RNA concentration (24%), IGF-I mRNA (77%), and Type IIa myosin heavy chain (MHC) mRNA (8%), and a concomitant decrease in T...Continue Reading

Citations

Mar 24, 2018·Medicine and Science in Sports and Exercise·Kevin A MurachScott Trappe
Dec 14, 2018·Sports Medicine - Open·Henrik PetréC Mikael Mattsson
May 11, 2019·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·Emanuele GhioneRobert Zivadinov
Mar 5, 2020·American Journal of Physiology. Cell Physiology·Clay E PandorfGregory R Adams
May 13, 2017·Frontiers in Physiology·Per A TeschTommy R Lundberg
Jul 1, 2020·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·E M K HaynesJ M Jakobi
Aug 9, 2019·Journal of Functional Morphology and Kinesiology·Timothy J SuchomelMichael H Stone

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