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R. Fitts · SciRah

Researcher profile · Semantic Scholar

R. Fitts

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R. Fitts — researcher profile on SciRah

h-index: 63
Works: 206
Citations: 11K

Most-cited papers

Functional and structural adaptations of skeletal muscle to microgravity.
R. Fitts, D. Riley, J. Widrick
2001Journal of Experimental Biology493 citations
Semantic Scholar
Exercise in space: human skeletal muscle after 6 months aboard the International Space Station.
S. Trappe, D. Costill, Philip M. Gallagher, Andrew C. Creer +4 more
2009Journal of applied physiology468 citations Open access
Semantic Scholar
Prolonged space flight‐induced alterations in the structure and function of human skeletal muscle fibres
R. Fitts, S. Trappe, D. Costill, Philip M. Gallagher +6 more
2010Journal of Physiology344 citations Open access
Semantic Scholar
Effect of a 17 day spaceflight on contractile properties of human soleus muscle fibres
J. Widrick, S. Knuth, K. Norenberg, J. Romatowski +7 more
1999Journal of Physiology272 citations Open access
Semantic Scholar
Fatigue Mechanisms Determining Exercise Performance The cross-bridge cycle and skeletal muscle fatigue
R. Fitts
2008255 citations
Semantic Scholar
Fiber type and temperature dependence of inorganic phosphate: implications for fatigue.
E. Debold, H. Dave, R. Fitts
2004American Journal of Physiology - Cell Physiology128 citations
Semantic Scholar
Decreased thin filament density and length in human atrophic soleus muscle fibers after spaceflight.
D. Riley, James L. W. Bain, Joyce L. Thompson, R. Fitts +4 more
2000Journal of applied physiology126 citations Open access
Semantic Scholar
The deleterious effects of bed rest on human skeletal muscle fibers are exacerbated by hypercortisolemia and ameliorated by dietary supplementation.
R. Fitts, J. Romatowski, James R. Peters, D. Paddon-Jones +2 more
2007American Journal of Physiology - Cell Physiology121 citations
Semantic Scholar
Fiber-type susceptibility to eccentric contraction-induced damage of hindlimb-unloaded rat AL muscles.
K. Vijayan, Joyce L. Thompson, K. Norenberg, R. Fitts +1 more
2001Journal of applied physiology115 citations Open access
Semantic Scholar
Low cell pH depresses peak power in rat skeletal muscle fibres at both 30°C and 15°C: implications for muscle fatigue
S. Knuth, H. Dave, J. Peters, R. Fitts
2006108 citations Open access
Semantic Scholar
Effect of 17 days of bed rest on peak isometric force and unloaded shortening velocity of human soleus fibers.
J. Widrick, J. Romatowski, J. L. Bain, S. Trappe +5 more
1997American Journal of Physiology106 citations
Semantic Scholar
The Role of Acidosis in Fatigue: Pro Perspective.
R. Fitts
2016Medicine & Science in Sports & Exercise103 citations
Semantic Scholar
Muscle Fatigue from the Perspective of a Single Crossbridge.
E. Debold, R. Fitts, Christopher W. Sundberg, T. Nosek
2016Medicine & Science in Sports & Exercise99 citations Open access
Semantic Scholar
Bioenergetic basis of skeletal muscle fatigue
Christopher W. Sundberg, R. Fitts
2019Current Opinion in Physiology96 citations Open access
Semantic Scholar
Cardiorespiratory responses to physical work during and following 17 days of bed rest and spaceflight.
T. Trappe, S. Trappe, Gary A. Lee, J. Widrick +2 more
2006Journal of applied physiology94 citations Open access
Semantic Scholar
Disproportionate loss of thin filaments in human soleus muscle after 17‐day bed rest
D. A. Riley, James L. W. Bain, Joyce L. Thompson, R. Fitts +4 more
1998Muscle and Nerve94 citations
Semantic Scholar
Comparison of a space shuttle flight (STS-78) and bed rest on human muscle function.
S. Trappe, T. Trappe, Gary A. Lee, J. Widrick +2 more
2001Journal of applied physiology92 citations
Semantic Scholar
The depressive effect of Pi on the force-pCa relationship in skinned single muscle fibers is temperature dependent.
E. Debold, J. Romatowski, R. Fitts
2006American Journal of Physiology - Cell Physiology91 citations
Semantic Scholar
Effects of elevated H+ and Pi on the contractile mechanics of skeletal muscle fibres from young and old men: implications for muscle fatigue in humans
Christopher W. Sundberg, S. Hunter, S. Trappe, Carolyn S. Smith +1 more
2018Journal of Physiology90 citations Open access
Semantic Scholar
Substrate profile in rat soleus muscle fibers after hindlimb unloading and fatigue.
V. Grichko, A. Heywood-Cooksey, K. Kidd, R. Fitts
2000Journal of applied physiology86 citations Open access
Semantic Scholar
Functional properties of slow and fast gastrocnemius muscle fibers after a 17-day spaceflight.
J. Widrick, J. Romatowski, K. Norenberg, S. Knuth +6 more
2001Journal of applied physiology84 citations Open access
Semantic Scholar
Hindlimb unloading-induced muscle atrophy and loss of function: protective effect of isometric exercise.
Jim Hurst, R. Fitts
2003Journal of applied physiology77 citations
Semantic Scholar
Effects of regular exercise training on skeletal muscle contractile function.
R. Fitts
2003American Journal of Physical Medicine & Rehabilitation76 citations
Semantic Scholar
Force-velocity-power and force-pCa relationships of human soleus fibers after 17 days of bed rest.
J. Widrick, K. Norenberg, J. Romatowski, C. Blaser +6 more
1998Journal of applied physiology74 citations
Semantic Scholar
Calsequestrin depolymerizes when calcium is depleted in the sarcoplasmic reticulum of working muscle
C. Manno, L. Figueroa, D. Gillespie, R. Fitts +3 more
2017Proceedings of the National Academy of Sciences of the United States of America71 citations Open access
Semantic Scholar
Depletion of muscle and liver glycogen during exercise
Km Baldwin, R. Fitts, F. Booth, W. Winder +1 more
2004Pflügers Archiv70 citations
Semantic Scholar
Effects of low cell pH and elevated inorganic phosphate on the pCa-force relationship in single muscle fibers at near-physiological temperatures.
C. R. Nelson, R. Fitts
2014American Journal of Physiology - Cell Physiology69 citations Open access
Semantic Scholar
Phosphate and acidosis act synergistically to depress peak power in rat muscle fibers.
C. R. Nelson, E. Debold, R. Fitts
2014American Journal of Physiology - Cell Physiology66 citations Open access
Semantic Scholar
Mechanisms of Muscular Fatigue
R. Fitts
200463 citations
Semantic Scholar
Bioenergetic basis for the increased fatigability with ageing
Christopher W. Sundberg, R. Prost, R. Fitts, S. Hunter
2019Journal of Physiology60 citations
Semantic Scholar
Thin filament diversity and physiological properties of fast and slow fiber types in astronaut leg muscles.
D. Riley, J. L. Bain, Joyce L. Thompson, R. Fitts +4 more
2002Journal of applied physiology52 citations
Semantic Scholar
Five myofibrillar lesion types in eccentrically challenged, unloaded rat adductor longus muscle—a test model
Joyce L. Thompson, E. Balog, R. Fitts, D. A. Riley
1999The Anatomical Record51 citations Open access
Semantic Scholar
Contractile properties of rat, rhesus monkey, and human type I muscle fibers.
J. Widrick, J. Romatowski, M. Karhánek, R. Fitts
1997American Journal of Physiology50 citations Open access
Semantic Scholar
Skeletal muscle fiber atrophy: altered thin filament density changes slow fiber force and shortening velocity.
D. Riley, James L. W. Bain, J. Romatowski, R. Fitts
2005American Journal of Physiology - Cell Physiology49 citations
Semantic Scholar
Effects of prolonged space flight on human skeletal muscle enzyme and substrate profiles.
R. Fitts, P. Colloton, S. Trappe, D. Costill +2 more
2013Journal of applied physiology44 citations
Semantic Scholar
Contractility of Induced Pluripotent Stem Cell-Cardiomyocytes With an MYH6 Head Domain Variant Associated With Hypoplastic Left Heart Syndrome
Min‐su Kim, Brandon Fleres, Jerrell Lovett, Melissa Anfinson +10 more
2020Frontiers in Cell and Developmental Biology42 citations Open access
Semantic Scholar
Velocity, force, power, and Ca2+ sensitivity of fast and slow monkey skeletal muscle fibers.
R. Fitts, S. Bodine, Janell G. Romatowski, J. Widrick
1998Journal of applied physiology40 citations
Semantic Scholar
Spaceflight effects on single skeletal muscle fiber function in the rhesus monkey.
R. Fitts, D. Desplanches, J. Romatowski, J. Widrick
2000American Journal of Physiology. Regulatory Integrative and Comparative Physiology39 citations
Semantic Scholar
Effect of intermittent weight bearing on soleus fiber force-velocity-power and force-pCa relationships.
J. J. Bangart, J. Widrick, R. Fitts
1997Journal of applied physiology38 citations
Semantic Scholar
Significance of α-Myosin Heavy Chain (MYH6) Variants in Hypoplastic Left Heart Syndrome and Related Cardiovascular Diseases
Melissa Anfinson, R. Fitts, J. Lough, Jeanne M. James +4 more
2022Journal of Cardiovascular Development and Disease37 citations Open access
Semantic Scholar
Peak force and maximal shortening velocity of soleus fibers after non-weight-bearing and resistance exercise.
J. Widrick, R. Fitts
1997Journal of applied physiology37 citations
Semantic Scholar
Effect of recombinant growth hormone replacement in a growth hormone deficient subject recovering from mild traumatic brain injury: A case report
Vinita Bhagia, C. Gilkison, R. Fitts, D. Zgaljardic +4 more
2010Brain Injury35 citations
Semantic Scholar
Low cell pH depresses peak power in rat skeletal muscle fibres at both 30 degrees C and 15 degrees C: implications for muscle fatigue.
S. Knuth, H. Dave, J. R. Peters, R. Fitts
2006Journal of Physiology32 citations
Semantic Scholar
Passive stretch inhibits central corelike lesion formation in the soleus muscles of hindlimb-suspended unloaded rats.
David V. Baewer, M. Hoffman, J. Romatowski, James L. W. Bain +2 more
2004Journal of applied physiology30 citations
Semantic Scholar
Weekly versus monthly testosterone administration on fast and slow skeletal muscle fibers in older adult males.
R. Fitts, James R. Peters, E. L. Dillon, W. Durham +2 more
2015Journal of Clinical Endocrinology and Metabolism29 citations Open access
Semantic Scholar
Effects of depolarization and low intracellular pH on charge movement currents of frog skeletal muscle fibers.
E. Balog, R. Fitts
2001Journal of applied physiology26 citations
Semantic Scholar
Effect of 17 days of bed rest on peak isometric force and unloaded shortening velocity of human soleus fibers.
J. Widrick, J. Romatowski, James L. W. Bain, S. Trappe +5 more
1997American Journal of Physiology - Cell Physiology24 citations
Semantic Scholar
Contractile responses of the rat gastrocnemius and soleus muscles to isotonic resistance exercise.
K. Norenberg, R. Fitts
2004Journal of applied physiology22 citations Open access
Semantic Scholar
Ca2+ dependency of limb muscle fiber contractile mechanics in young and older adults.
Laura E. Teigen, Christopher W. Sundberg, Lauren J. Kelly, S. Hunter +1 more
2020American Journal of Physiology - Cell Physiology21 citations Open access
Semantic Scholar
Skeletal muscle PGC-1β signaling is sufficient to drive an endurance exercise phenotype and to counteract components of detraining in mice.
Samuel Lee, T. Leone, Lisa Rogosa, J. Rumsey +5 more
2017American Journal of Physiology. Endocrinology and Metabolism18 citations Open access
Semantic Scholar

Frequent co-authors

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J. Widrick×15
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J. Widrick — researcher profile on SciRah
D. Costill×13
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D. Costill — researcher profile on SciRah
J. Romatowski×12
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S. Trappe×10
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S. Trappe — researcher profile on SciRah

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James L. W. Bain×8

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D. Riley — researcher profile on SciRah

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D. A. Riley — researcher profile on SciRah

Joyce L. Thompson×6

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Joyce L. Thompson — researcher profile on SciRah

K. Norenberg×5

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K. Norenberg — researcher profile on SciRah

Christopher W. Sundberg×5

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Christopher W. Sundberg — researcher profile on SciRah

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S. Trappe — researcher profile on SciRah