Results 161 to 170 of about 111,781 (292)

Designing Beyond Current Conceptualizations of Spaceflight Experiences [PDF]

open access: yesarXiv
The potential future democratization of spaceflight reveals a need for design of experiences that extend beyond our current conceptualization of spaceflight. Research on career astronauts indicates that transformative experiences occur during spaceflight despite the physiological and psychological stressors involved.
arxiv  

NASA Human Health and Performance Information Architecture Panel [PDF]

open access: yes
The Human Health and Performance (HH&P) Directorate at NASA's Johnson Space Center has a mission to enable optimization of human health and performance throughout all phases of spaceflight.
Johnson-Throop, Kathy   +2 more
core   +1 more source

Temporal Changes in Astronauts Muscle and Cardiorespiratory Physiology Pre-, In-, and Post-Spaceflight [PDF]

open access: yes
NASAs vision for future exploration missions depends on the ability to protect astronauts health and safety for performance of Extravehicular Activity (EVA), and to allow astronauts to safely egress from vehicles in a variety of landing scenarios (e.g ...
Abercromby, A. F.   +9 more
core   +1 more source

Plasticity of the heart in response to changes in physical activity

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend The heart adapts to changes in physical activity, with inactivity (e.g. bed rest or spaceflight) causing cardiac atrophy and ventricular stiffening, and endurance exercise training leading to eccentric hypertrophy and improved ventricular compliance.
Eric T. Hedge   +3 more
wiley   +1 more source

Motor unit adaptation to disuse: crossing the threshold from firing rate suppression to neuromuscular junction transmission

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Neuromuscular disuse scenarios of limb immobilization, reduced activity and bed rest result in impairments of muscle strength that exceed losses of muscle size. Neural adaptations are an assured consequence of disuse. The available evidence garnered from human and animal models highlights suppressed motor unit firing rate (MUFR ...
Mathew Piasecki
wiley   +1 more source

Neuromuscular mechanisms for the fast decline in rate of force development with muscle disuse – a narrative review

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Muscle unloading induces declines in muscle function, particularly in maximal and explosive strength. The decline in explosive strength (quantified as rate of force development, RFD) is greater than the decline in maximal strength (quantified as maximal force, Fmax).
Luca Ruggiero, Markus Gruber
wiley   +1 more source

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