The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.
Cardiac fatigue after prolonged exercise.
Abstract
To determine the effects of prolonged exercise on systolic and diastolic left ventricular function, we studied 21 athletes before, at the finish (within 11 +/- 5 min), and during recovery (28 +/- 9 hr) after the Hawaii Ironman Triathlon (2.4 mile swim, 112 mile bike, 26.2 mile run). Two-dimensionally guided M mode echocardiograms were digitized for wall thickness, cavity dimension, fractional shortening, and peak rates of cavity enlargement and wall thinning. Pulsed Doppler left ventricular inflow recordings were analyzed for peak early and late velocities and their ratio. Left ventricular diastolic dimension was reduced at race finish (5.4 +/- 0.6 to 5.1 +/- 0.6 cm) and remained reduced after 1 day of recovery (5.2 +/- 0.6 cm, p less than .05). Fractional shortening fell at race finish (39 +/- 5% to 35 +/- 5%), although systolic blood pressure was unchanged, and rose to 40 +/- 4% after recovery (p less than .05). The return to prerace shortening values after recovery occurred despite continued reduction in diastolic size. Peak circumferential shortening did not change significantly. Individual reductions in fractional shortening were correlated with increases in systolic cavity size (r = -.64, p less than .01), but not with decreases in diastolic size. The stress-shortening relationship was displaced downward at race finish, but returned toward baseline after 1 day of recovery, despite a persistent reduction in cavity size. This suggests that the decrease in shortening was due to impaired contractility as well as altered preload.(ABSTRACT TRUNCATED AT 250 WORDS)
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Spirito, P., Maron, B. J., & Bonow, R. O. (1986) · Journal of the American College of Cardiology · doi:10.1016/s0735-1097(86)80461-2 · Cited by 421
Miyatake, K., Okamoto, M., Kinoshita, N., Owa, M., Nakasone, I., Sakakibara, H., & Nimura, Y. (1984) · The American Journal of Cardiology · doi:10.1016/0002-9149(84)90035-3 · Cited by 392
Mahler, F., Ross, J., O'Rourke, R. A., & Covell, J. W. (1975) · The American Journal of Cardiology · doi:10.1016/0002-9149(75)90048-x · Cited by 388
Left ventricular end-systolic stress-shortening and stress-length relations in humans
Borow, K. M., Green, L. H., Grossman, W., & Braunwald, E. (1982) · The American Journal of Cardiology · doi:10.1016/0002-9149(82)90467-2 · Cited by 272
Doppler evaluation of left ventricular diastolic filling in children with systemic hypertension
Snider, A. R., Gidding, S. S., Rocchini, A. P., Rosenthal, A., Dick, M., Crowley, D. C., & Peters, J. (1985) · The American Journal of Cardiology · doi:10.1016/0002-9149(85)90405-9 · Cited by 235
Plasma volume changes following exercise and thermal dehydration.
Costill, D. L., & Fink, W. J. (1974) · Journal of Applied Physiology · doi:10.1152/jappl.1974.37.4.521 · Cited by 235
Circulatory response to prolonged severe exercise
Saltin, B., & Stenberg, J. (1964) · Journal of Applied Physiology · doi:10.1152/jappl.1964.19.5.833 · Cited by 202
Effect of brief and prolonged exercise on left ventricular function
Upton, M. T., Rerych, S. K., Roeback, J. R., Newman, G. E., Douglas, J. M., Wallace, A. G., & Jones, R. H. (1980) · The American Journal of Cardiology · doi:10.1016/0002-9149(80)90473-7 · Cited by 51
Echocardiographic assessment of left ventricular performance before and after marathon running
Perrault, H., Péronnet, F., Lebeau, R., & Nadeau, R. A. (1986) · American Heart Journal · doi:10.1016/0002-8703(86)90316-9 · Cited by 45
Cited by
Troponin elevation in coronary vs. non-coronary disease
Agewall, S., Giannitsis, E., Jernberg, T., & Katus, H. (2011) · European Heart Journal · doi:10.1093/eurheartj/ehq456 · Cited by 592
Neilan, T. G., Januzzi, J. L., Lee-Lewandrowski, E., Ton-Nu, T.-T., Yoerger, D. M., Jassal, D. S., Lewandrowski, K. B., Siegel, A. J., Marshall, J. E., Douglas, P. S., et al. (2006) · Circulation · doi:10.1161/circulationaha.106.647461 · Cited by 519
Self-citationAcute cardiac effects of marathon running
Trivax, J. E., Franklin, B. A., Goldstein, J. A., Chinnaiyan, K. M., Gallagher, M. J., deJong, A. T., Colar, J. M., Haines, D. E., & McCullough, P. A. (2010) · Journal of Applied Physiology · doi:10.1152/japplphysiol.01151.2009 · Cited by 229
Persistent and reversible cardiac dysfunction among amateur marathon runners
Neilan, T. G., Yoerger, D. M., Douglas, P. S., Marshall, J. E., Halpern, E. F., Lawlor, D., Picard, M. H., & Wood, M. J. (2006) · European Heart Journal · doi:10.1093/eurheartj/ehi813 · Cited by 206
Self-citationRelation of Biomarkers and Cardiac Magnetic Resonance Imaging After Marathon Running
Mousavi, N., Czarnecki, A., Kumar, K., Fallah-Rad, N., Lytwyn, M., Han, S.-Y., Francis, A., Walker, J. R., Kirkpatrick, I. D. C., Neilan, T. G., et al. (2009) · The American Journal of Cardiology · doi:10.1016/j.amjcard.2009.01.294 · Cited by 190
Metadata
- Authors
- Douglas, P. S., O'Toole, M. L., Hiller, W. D., Hackney, K., & Reichek, N.
- Venue
- Circulation
- Published
- 1987-12
- Volume
- 76
- Issue
- 6
- Pages
- 1206-1213
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W2149495167
- Cited by
- 264
- References
- 9
- FWCI
- 4.29
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Cardiac fatigue after prolonged exercise. https://app.cochat.ai/papers/10.1161/01.cir.76.6.1206
- The paper
- Douglas, P. S., O'Toole, M. L., Hiller, W. D., Hackney, K., & Reichek, N. (1987). Cardiac fatigue after prolonged exercise. Circulation. https://doi.org/10.1161/01.cir.76.6.1206
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.