Publications by authors named "Stephanie L Lazarczuk"

3 Publications

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Does isometric exercise result in exercise induced hypoalgesia in people with local musculoskeletal pain? A systematic review.

Phys Ther Sport 2021 May 19;49:51-61. Epub 2020 Sep 19.

La Trobe Sports and Exercise Medicine Research Centre, La Trobe University, Bundoora, Victoria, Australia. Electronic address:

Objective: The aim of this review was to investigate if exercise induced hypoalgesia (EIH) occurs following isometric muscle contraction in people with local musculoskeletal symptoms.

Design: Systematic review.

Data Sources: MEDLINE, EMBASE, CINAHL & SportDiscus electronic databases were searched (inception to April 2020).

Eligibility Criteria: Two authors independently evaluated eligibility. Randomised controlled and crossover (repeated measures) trials that measured the effects of isometric exercise in participants with localised musculoskeletal pain during, and up to 2 hours after isometric exercise were included. Other inclusion criteria included comparison to another intervention, or comparison to healthy controls. Primary outcomes were experimentally induced pain thresholds and secondary outcomes included measures of pain sensitivity from clinical testing.

Results: 13 studies with data from 346 participants were included for narrative synthesis. EIH was reported in some upper and lower limb studies but there were no consistent data to show isometric exercises were superior to comparison interventions.

Conclusion: There was no consistent evidence for EIH following isometric exercise in people with musculoskeletal pain. These findings are different to those reported in asymptomatic populations (where EIH is consistently demonstrated) as well as conditions associated with widespread symptoms such as fibromyalgia (where isometric exercise may induce hyperalgesia). Although well tolerated when prescribed, isometric exercise did not induce EIH consistently for people seeking care for local musculoskeletal symptoms. The variance in the dose, location of contraction and intensity of protocols included in this review may explain the inconsistent findings. Further work is required to better understand endogenous analgesia in musculoskeletal pain conditions.
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May 2021

The epidemiology of kicking injuries in professional Rugby Union: A 15-season prospective study.

Scand J Med Sci Sports 2020 Sep 18;30(9):1739-1747. Epub 2020 Jun 18.

Applied Sports, Technology, Exercise and Medicine Research Centre, Swansea University, Swansea, UK.

Purpose: While kicking in Rugby Union can be influential to match outcome, the epidemiology of kicking injuries remains unknown. This study therefore aimed to investigate the epidemiology of injuries attributed to kicking in professional rugby, including playing position-specific effects and differences in kicking volumes and kick types.

Methods: Fifteen seasons of injury surveillance data and two seasons of match kicking characteristics from professional rugby players were analyzed. Incidence, propensity, and severity of kicking-related injuries were calculated together with the locations and types of these injuries. Position-related differences in match kicking types and volumes were also established.

Results: Seventy-seven match and 55 training acute-onset kicking injuries were identified. The match kicking injury incidence for backs was 1.4/1000 player-match-hours. Across all playing positions, the propensity for match kicking injury was 0.57 injuries/1000 kicks. Fly-halves sustained the greatest proportion of match kicking injuries (47%) and performed the greatest proportion of match kicks (46%); an average propensity for match kicking injury (0.58/1000 kicks). Scrum-halves executed 27% of match-related kicks but had a very low propensity for match kicking injury (0.17/1000 kicks). All other positional groups executed a small proportion of match-related kicks but a high propensity for match kicking injury. Ninety-two percent of match kicking injuries occurred in the pelvis or lower limb, with the majority sustained by the kicking limb. 21% of all match kicking injuries were associated with the rectus femoris muscle.

Conclusion: Match kicking profiles and kicking injuries sustained are position-dependent, which provides valuable insight for developing player-specific conditioning and rehabilitation protocols.
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September 2020

Epidemiology of Injuries in West End Performers.

J Dance Med Sci 2019 Dec;23(4):139-144

Sport Rehabilitation, Faculty of Sport, Health and Applied Science, St Mary's University, Twickenham, UK;, Email:

Epidemiological studies in the performing arts are scarce, and only one such study in the last 20 years directly examined West End productions. Therefore, the aim of this study was to analyze the epidemiology of injuries sustained by West End performers over a 12-month period (2016 to 2017). Injury data were self-reported retrospectively by West End performers using an online injury surveillance questionnaire. The information collected covered participant characteristics, injury location, diagnosis, severity, mechanism of injury, and external risk factors. Simple proportions were calculated for injury location and type. Categorical data were assessed using chi-squared (p = 0.05) and magnitude-based inferences described between-group differences. Forty-seven performers responded (26 male, 21 female), with 65% suffering at least one injury in the previous year. The lower limb accounted for 50% of injuries, and muscle strains were the diagnosis in 37% of cases. Males sustained 53% of all injuries, but no differences were found between sexes in locations injured (χ = 2.296, p = 0.513). Seventy-two percent of injuries were said to have occurred during performance, with one-third of the total injuries having a gradual onset. Little or no time was lost in the majority of cases.
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December 2019