Liam D. Harper

2.3k total citations · 1 hit paper
53 papers, 1.6k citations indexed

About

Liam D. Harper is a scholar working on Orthopedics and Sports Medicine, Cell Biology and Developmental and Educational Psychology. According to data from OpenAlex, Liam D. Harper has authored 53 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Orthopedics and Sports Medicine, 13 papers in Cell Biology and 12 papers in Developmental and Educational Psychology. Recurrent topics in Liam D. Harper's work include Sports Performance and Training (43 papers), Sports injuries and prevention (31 papers) and Muscle metabolism and nutrition (13 papers). Liam D. Harper is often cited by papers focused on Sports Performance and Training (43 papers), Sports injuries and prevention (31 papers) and Muscle metabolism and nutrition (13 papers). Liam D. Harper collaborates with scholars based in United Kingdom, Portugal and Australia. Liam D. Harper's co-authors include Robert J. Naughton, Mark Russell, Richard Page, Filipe Manuel Clemente, António J. Figueiredo, Hugo Sarmento, Emma Stevenson, Daniel J. West, Tom Clifford and Israel Teoldo and has published in prestigious journals such as PLoS ONE, Sports Medicine and Nutrients.

In The Last Decade

Liam D. Harper

50 papers receiving 1.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Small sided games in soccer – a systematic review

2018 254 citations Hugo Sarmento, Liam D. Harper et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Liam D. Harper United Kingdom	24	1.2k	395	236	228	227	53	1.6k
Hadi Nobarı Spain	25	1.7k 1.4×	517 1.3×	167 0.7×	362 1.6×	298 1.3×	226	2.5k
Bianca Miarka Brazil	29	1.9k 1.6×	540 1.4×	107 0.5×	190 0.8×	217 1.0×	153	2.5k
Anne Delextrat United Kingdom	26	1.8k 1.5×	579 1.5×	182 0.8×	407 1.8×	264 1.2×	90	2.4k
Daniel Castillo Spain	31	2.0k 1.7×	618 1.6×	166 0.7×	350 1.5×	110 0.5×	155	2.4k
Daniel J. Peart United Kingdom	14	784 0.6×	243 0.6×	197 0.8×	216 0.9×	148 0.7×	40	1.1k
Monoem Haddad Qatar	21	1.2k 1.0×	346 0.9×	104 0.4×	438 1.9×	252 1.1×	67	1.7k
Ursula Ferreira Júlio Brazil	21	1.1k 0.9×	214 0.5×	133 0.6×	365 1.6×	177 0.8×	59	1.3k
Anis Chaouachi Tunisia	26	1.8k 1.5×	469 1.2×	158 0.7×	553 2.4×	281 1.2×	68	2.3k
W. Guy Hornsby United States	17	947 0.8×	194 0.5×	156 0.7×	337 1.5×	303 1.3×	54	1.6k
João Gustavo Claudino Brazil	16	956 0.8×	164 0.4×	151 0.6×	230 1.0×	136 0.6×	46	1.4k

Countries citing papers authored by Liam D. Harper

Since Specialization

Citations

This map shows the geographic impact of Liam D. Harper's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Liam D. Harper with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Liam D. Harper more than expected).

Fields of papers citing papers by Liam D. Harper

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Liam D. Harper. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Liam D. Harper. The network helps show where Liam D. Harper may publish in the future.

Co-authorship network of co-authors of Liam D. Harper

This figure shows the co-authorship network connecting the top 25 collaborators of Liam D. Harper. A scholar is included among the top collaborators of Liam D. Harper based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Liam D. Harper. Liam D. Harper is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Fischer, Anne, Mark A. Hearris, Paul T. Morgan, et al.. (2025). Negligible Effects of Fructose–Glucose Composite Carbohydrates on Performance Across a Prolonged Soccer Match Simulation Compared With a Glucose-Only Control in Semiprofessional Soccer Players. International Journal of Sport Nutrition and Exercise Metabolism. 35(5). 404–415.

Field, Adam, Greg Wood, Mark A. Hearris, et al.. (2024). Caffeine Gum Improves Reaction Time but Reduces Composure Versus Placebo During the Extra-Time Period of Simulated Soccer Match-Play in Male Semiprofessional Players. International Journal of Sport Nutrition and Exercise Metabolism. 34(5). 286–297. 1 indexed citations

Díaz‐García, Jesús, et al.. (2024). The influence of the perceived requirements of the next match and motivation on the mental fatigue of soccer players. Scandinavian Journal of Medicine and Science in Sports. 34(2). e14580–e14580. 3 indexed citations

Page, Richard, Adam Field, Ben Langley, Liam D. Harper, & Ross Julian. (2022). The Effects of Fixture Congestion on Injury in Professional Male Soccer: A Systematic Review. Sports Medicine. 53(3). 667–685. 22 indexed citations

Field, Adam, et al.. (2021). The effects of cocoa flavanols on indices of muscle recovery and exercise performance: a narrative review. BMC Sports Science Medicine and Rehabilitation. 13(1). 90–90. 8 indexed citations

Field, Adam, Chris Thompson, Hugo Sarmento, et al.. (2021). Recovery following the extra-time period of soccer: practitioner perspectives and applied practices. Biology of Sport. 39(1). 171–179. 3 indexed citations

Fleming, James, et al.. (2021). Dietary Intake and Daily Distribution of Carbohydrate, Protein and Fat in Youth Tennis Players over a 7-Day Training and Competition Period. Journal of Sports Science and Medicine. 20(3). 413–420. 4 indexed citations

Towlson, Chris, J Ade, Kevin Enright, et al.. (2020). Maturity-associated considerations for training load, injury risk, and physical performance in youth soccer: One size does not fit all. Journal of sport and health science. 10(4). 403–412. 124 indexed citations

Field, Adam, Robert J. Naughton, Steve Lui, et al.. (2020). The demands of the extra-time period of soccer: A systematic review. Journal of sport and health science. 11(3). 403–414. 19 indexed citations

10.

Abbott, Will, Adam Brett, Thomas E. Brownlee, et al.. (2020). The prevalence of disordered eating in elite male and female soccer players. Eating and Weight Disorders - Studies on Anorexia Bulimia and Obesity. 26(2). 491–498. 35 indexed citations

11.

Julian, Ross, Richard Page, & Liam D. Harper. (2020). The Effect of Fixture Congestion on Performance During Professional Male Soccer Match-Play: A Systematic Critical Review with Meta-Analysis. Sports Medicine. 51(2). 255–273. 82 indexed citations

12.

Stevenson, Emma, et al.. (2017). A comparison of isomaltulose versus maltodextrin ingestion during soccer-specific exercise. European Journal of Applied Physiology. 117(11). 2321–2333. 35 indexed citations

13.

Goodall, Stuart, Kevin Thomas, Liam D. Harper, et al.. (2017). The assessment of neuromuscular fatigue during 120 min of simulated soccer exercise. European Journal of Applied Physiology. 117(4). 687–697. 41 indexed citations

14.

Harper, Liam D., Emma Stevenson, Ian Rollo, & Mark Russell. (2017). The influence of a 12% carbohydrate-electrolyte beverage on self-paced soccer-specific exercise performance. Journal of science and medicine in sport. 20(12). 1123–1129. 29 indexed citations

15.

Harper, Liam D., et al.. (2016). Practitioners' Perceptions of the Soccer Extra-Time Period: Implications for Future Research. PLoS ONE. 11(7). e0157687–e0157687. 24 indexed citations

16.

Harper, Liam D., et al.. (2015). Physiological and performance effects of carbohydrate gels consumed prior to the extra-time period of prolonged simulated soccer match-play. Journal of science and medicine in sport. 19(6). 509–514. 36 indexed citations

17.

Harper, Liam D., et al.. (2015). The Effects of 120 Minutes of Simulated Match Play on Indices of Acid-Base Balance in Professional Academy Soccer Players. The Journal of Strength and Conditioning Research. 30(6). 1517–1524. 10 indexed citations

18.

Harper, Liam D., Daniel J. West, Emma Stevenson, & Mark Russell. (2014). Technical Performance Reduces during the Extra-Time Period of Professional Soccer Match-Play. PLoS ONE. 9(10). e110995–e110995. 37 indexed citations

19.

Russell, Mark, Daniel J. West, Liam D. Harper, Christian J. Cook, & Liam P. Kilduff. (2014). Half-Time Strategies to Enhance Second-Half Performance in Team-Sports Players: A Review and Recommendations. Sports Medicine. 45(3). 353–364. 84 indexed citations

20.

Selfe, James, et al.. (2002). Cold legs: a potential indicator of negative outcome in the rehabilitation of patients with patellofemoral pain syndrome. The Knee. 10(2). 139–143. 20 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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