The DOI matches its Crossref record; 15 of the 15 references it cites were found in a registry or an index.
Superior results with eccentric compared to concentric quadriceps training in patients with jumper’s knee: a prospective randomised study
Open accessAbstract
Background:A recent study reported promising clinical results using eccentric quadriceps training on a decline board to treat jumper’s knee (patellar tendinosis). Methods:In this prospective study, athletes (mean age 25 years) with jumper’s knee were randomised to treatment with either painful eccentric or painful concentric quadriceps training on a decline board. Fifteen exercises were repeated three times, twice daily, 7 days/week, for 12 weeks. All patients ceased sporting activities for the first 6 weeks. Age, height, weight, and duration of symptoms were similar between groups. Visual analogue scales (VAS; patient estimation of pain during exercise) and Victorian Institute of Sport Assessment (VISA) scores, before and after treatment, and patient satisfaction, were used for evaluation. Results:In the eccentric group, for 9/10 tendons patients were satisfied with treatment, VAS decreased from 73 to 23 (p<0.005), and VISA score increased from 41 to 83 (p<0.005). In the concentric group, for 9/9 tendons patients were not satisfied, and there were no significant differences in VAS (from 74 to 68, p<0.34) and VISA score (from 41 to 37, p<0.34). At follow up (mean 32.6 months), patients in the eccentric group were still satisfied and sports active, but all patients in the concentric group had been treated surgically or by sclerosing injections. Conclusions:In conclusion, eccentric, but not concentric, quadriceps training on a decline board, seems to reduce pain in jumper’s knee. The study aimed to include 20 patients in each group, but was stopped at the half time control because of poor results achieved in the concentric group.
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
Histopathology of Common Tendinopathies: Update and Implications for Clinical Management
Khan, K. M., Cook, J. L., Bonar, F., Harcourt, P., & ??strom, M. (1999) · Sports Medicine · doi:10.2165/00007256-199927060-00004 · Cited by 982
Coleman, B. D., Khan, K. M., Maffulli, N., Cook, J. L., & Wark, J. D. (2000) · Scandinavian Journal of Medicine & Science in Sports · doi:10.1034/j.1600-0838.2000.010001002.x · Cited by 947
Visentini, P. J., Khan, K. M., Cook, J. L., Kiss, Z. S., Harcourt, P. R., & Wark, J. D. (1998) · Journal of Science and Medicine in Sport · doi:10.1016/s1440-2440(98)80005-4 · Cited by 480
Chronic Achilles tendon pain treated with eccentric calf‐muscle training
Fahlström, M., Jonsson, P., Lorentzon, R., & Alfredson, H. (2003) · Knee Surgery, Sports Traumatology, Arthroscopy · doi:10.1007/s00167-003-0418-z · Cited by 398
Self-citationYoung, M. A., Cook, J. L., Purdam, C. R., Kiss, Z. S., & Alfredson, H. (2005) · British Journal of Sports Medicine · doi:10.1136/bjsm.2003.010587 · Cited by 317
Self-citationCook, J. L., Feller, J. A., Bonar, S. F., & Khan, K. M. (2004) · Journal of Orthopaedic Research · doi:10.1016/j.orthres.2003.08.005 · Cited by 278
Alfredson, H., Thorsen, K., & Lorentzon, R. (1999) · Knee Surgery, Sports Traumatology, Arthroscopy · doi:10.1007/s001670050184 · Cited by 273
Self-citationPurdam, C. R., Jonsson, P., Alfredson, H., Lorentzon, R., Cook, J. L., & Khan, K. M. (2004) · British Journal of Sports Medicine · doi:10.1136/bjsm.2003.000053 · Cited by 271
Self-citationCook, J. L., Khan, K. M., Harcourt, P. R., Kiss, Z. S., Fehramann, M. W., Griffiths, L., & Wark, J. D. (1998) · Clinical Journal of Sport Medicine · doi:10.1097/00042752-199804000-00001 · Cited by 224
Where is the pain coming from in tendinopathy? It may be biochemical, not only structural, in origin
Khan, K. M., Cook, J. L., Maffulli, N., & Kannus, P. (2000) · British Journal of Sports Medicine · doi:10.1136/bjsm.34.2.81 · Cited by 213
Cited by
Treatment of Tendinopathy: What Works, What Does Not, and What is on the Horizon
Andres, B. M., & Murrell, G. A. C. (2008) · Clinical Orthopaedics & Related Research · doi:10.1007/s11999-008-0260-1 · Cited by 538
Malliaras, P., Barton, C. J., Reeves, N. D., & Langberg, H. (2013) · Sports Medicine · doi:10.1007/s40279-013-0019-z · Cited by 403
Isometric exercise induces analgesia and reduces inhibition in patellar tendinopathy
Rio, E., Kidgell, D., Purdam, C., Gaida, J., Moseley, G. L., Pearce, A. J., & Cook, J. (2015) · British Journal of Sports Medicine · doi:10.1136/bjsports-2014-094386 · Cited by 348
van Ark, M., Cook, J. L., Docking, S. I., Zwerver, J., Gaida, J. E., van den Akker-Scheek, I., & Rio, E. (2016) · Journal of Science and Medicine in Sport · doi:10.1016/j.jsams.2015.11.006 · Cited by 139
Peterson, M., Butler, S., Eriksson, M., & Svärdsudd, K. (2014) · Clinical Rehabilitation · doi:10.1177/0269215514527595 · Cited by 103
Metadata
- Authors
- Jonsson, P., & Alfredson, H.
- Venue
- British Journal of Sports Medicine
- Publisher
- BMJ
- Published
- 2005-10-21
- Volume
- 39
- Issue
- 11
- Pages
- 847-850
- ISSN
- 0306-3674 (ISSN-L)
- 1473-0480
- OpenAlex
- W2160782356
- Cited by
- 355
- References
- 15
- FWCI
- 14.95
- Type
- journal article
- Language
- en
- Open access
- bronze
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: Superior results with eccentric compared to concentric quadriceps training in patients with jumper’s knee: a prospective randomised study. https://app.cochat.ai/papers/10.1136/bjsm.2005.018630
- The paper
- Jonsson, P., & Alfredson, H. (2005). Superior results with eccentric compared to concentric quadriceps training in patients with jumper’s knee: a prospective randomised study. British Journal of Sports Medicine. https://doi.org/10.1136/bjsm.2005.018630
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.
