Mark David Williams

Dr. Mark David Williams

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Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 July 2021 in Perceptual and Motor Skills
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MWMark David Williams
Mark David Williams
Rodrigo Ramirez-CampilloRodrigo Ramirez-Campillo
Rodrigo Ramirez-Campillo
HCHelmi Chaabene
Helmi Chaabene
JMJason Moran
Jason Moran
Our purpose in this review was to determine the effects of bodyweight-only neuromuscular training (NMT) programs on motor control of movement among youth athletes. We searched three electronic databases (CrossRef, Google Scholar, and PubMed), using the following inclusion criteria for selecting research studies: (a) healthy male and female participants aged 8-18 years who were engaged in organized sports; (b) interventions up to 16-weeks duration; (c) incorporation of a control group; and (d) interventions that utilized only exercises using participants’ body mass. We calculated pooled estimates of effect sizes (standardized mean difference) for changes in motor control across nine studies (12 comparisons) using the inverse-variance random effects model for meta-analyses and 95% confidence intervals. Among the nine studies included in our meta-analysis, there was a moderate, significant effect in favor of neuromuscular training programs (0.79 [95% CI: 0.38, 1.20], Z = 3.76 [ p = 0.0002]) on motor control. Heterogeneity was high and significant ( I2= 77% [ p = 0.00001]). Moderator analyses for age and stature revealed NMT programs to be more effective in younger, shorter, and lighter individuals. We found larger effect sizes in males, and for programs >8 weeks in duration. We concluded that the older and heavier an individual is, the less effective bodyweight-only NMT programs became, particularly for female participants. These results reinforce the notion that exercise to enhance motor control should be emphasized during pre-adolescence.

12 July 2023 in PLOS ONE
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MWMark David Williams
Mark David Williams
AHAndrew Hammond
Andrew Hammond
JMJason Moran
Jason Moran
The purpose of this study was to compare the effects of a parkour-based warm-up to a conventional neuromuscular training (NMT) warm-up on the athletic capabilities of youth basketball players. This was examined through two arms: In Investigation 1, the aims were to measure the effects of the two warm-ups on physical measures of athletic performance in prepubescent basketball players. Using post-intervention semi-structured interviews, Investigation 2 aimed to gain insights from the players in relation to the perceived benefits of the two warm-ups. Pre-adolescent children were recruited from two youth level basketball teams. Participants from one club were randomly assigned to either a conventional NMT warm-up group or a parkour warm-up group, while a control group was formed of participants from the second club. Participants of both experimental groups were required to complete a 15-minute warm-up once per week before their regular basketball practice across 8-weeks. For both groups, the coach adopted the same pedagogical approach, utilising a guided discovery strategy. Pre-post test measures of overhead squat performance, countermovement jump, and 10-metre sprint speed were recorded in all three groups. Additionally, pre-post measures were recorded for a timed parkour-based obstacle course for the two experimental groups. No significant between-group differences were found between pre- and post-test measures. However, analysis using Cohen’sdeffect sizes revealed improvements in both intervention groups versus the control. Moreover, between group effect size differences were observed between the two experimental groups. Following the intervention, participants from both experimental groups were also invited to take part in a post-intervention semi-structured interview to discuss their experiences. The thematic analysis of these semi-structured interviews revealed three higher order themes:Enjoyment; Physical literacy;andDocility; of which the two former themes appear to align to constructs relating to the wider concept of physical literacy. In summary, warm-ups designed to improve athleticism can include less structured and more diverse movement skills than are typical of conventional NMT warm-ups. Specifically, we provide evidence that advocates for warm ups that include parkour-related activities alongside conventional NMT exercises to preserve physical fitness qualities and to simultaneously evoke a sense of enjoyment, fun, and purpose. The benefit of such activities may extend beyond athletic development and, more broadly, contribute to the development of physical literacy.

30 April 2025 in Journal of Human Kinetics
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Jorge AredeJorge Arede
Jorge Arede
ISIrem Sevin
Irem Sevin
MWMark David Williams
Mark David Williams
KMKazimierz Marian Mikołajec
Kazimierz Marian Mikołajec
RARicardo André Birrento Aguiar
Ricardo André Birrento Aguiar
Schöllhorn Immanuel WolfgangSchöllhorn Immanuel Wolfgang
Schöllhorn Immanuel Wolfgang
This study aimed to examine the impact of velocity and acceleration-based differential plyometric jump training on physical performance of youth basketball players. Twenty-six trained youth male players (14.5 ± 1.7 years; U14 [n = 14], U16 [n = 5], and U18 [n = 7]) were grouped into experimental and control groups. The experimental group completed two sessions per week of velocity-based differential plyometric training for 14 weeks (3 sets x 5 jumps with 20-s intervals of passive recovery between jumps and 2-min breaks between sets). Before each repetition, participants received verbal instruction to perform a different fluctuation. The control group continued regular training. Bilateral and unilateral countermovement jump (CMJ) height, the 20-m sprint test, and the Modified 505 Agility (M505) test were evaluated before and after the intervention. The training program yielded statistically significant improvements in the experimental group's CMJ bilateral jump height. Additionally, moderate improvements in the CMJR (Countermovement Jump Right Leg) and M505R (Modified 505 Agility Right) tests (BF10 > 3 to 10) were observed after the training program (δ ranged from 0.66 to 1.12). The control group demonstrated moderate improvements in the M505R (Modified 505 Agility Right) and M505L (Modified 505 Agility Left) tests (BF10 > 3 to 10) (δ = 0.65). Models combining different variables provided the best fit for the data in different physical variables. The results indicate that velocity and acceleration-based differential plyometric training can be a suitable strategy for improving physical performance of youth basketball players.

15 October 2021 in Frontiers in Physiology
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MWMark David Williams
Mark David Williams
BSBen William Strafford
Ben William Strafford
JSJoseph Antony Stone
Joseph Antony Stone
JMJason Moran
Jason Moran
While ideas from long-term athlete development (LTAD) models have been adopted and integrated across different sports, issues related to early specialization, such as increased risk of injury and burnout, are still common. Although some benefits may be associated with early sport specialization, sports sampling is purported to be a more effective approach to the long-term health and wellbeing of children. Furthermore, the concept of developing what are commonly referred to as “fundamental movement skills” (FMS) is central to the rationale for delaying single sports specialization. However, in place of sports sampling, it appears that the practice of strength and conditioning (S&C) has become a driving force behind developmental models for youth athletes, highlighted by the growing body of literature regarding youth athletic development training. In this perspective piece, we explore how conventional S&C practice may insufficiently develop FMS because typically, it only emphasizes a narrow range of foundational exercises that serve a limited role toward the development of action capabilities in youth athletic populations. We further discuss how this approach may limit the transferability of physical qualities, such as muscular strength, to sports-specific tasks. Through an ecological dynamics lens, and using basketball as an example, we explore the potential for parkour-based activity within the LTAD of youth basketball players. We propose parkour as a training modality to not only encourage movement diversity and adaptability, but also as part of an advanced strength training strategy for the transfer of conventional S&C training.

1 January 2021 in Journal of Teaching in Physical Education
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MWMark David Williams
Mark David Williams
AHAndrew M. Hammond
Andrew M. Hammond
JMJason Moran
Jason Moran
Purpose: To investigate youth basketball coaches’ perceptions and implementation of fundamental movement skills training. Method: Snowball and criterion-based sampling approaches were used to survey youth basketball coaches (n=79) beliefs and experiences relating to their perceptions and implementation of nonbasketball-specific skills and fundamental movement skills into practice. Realist evaluation inspired the analysis of descriptive statistics (means and frequencies) and reflexive qualitative thematic analysis to inform the results. Results: It was found that the participants had a comprehension of fundamental movement skills and acknowledge their value in the long-term development of youth players. However, there appeared to be varying levels of uptake among the surveyed coaches. Discussion: Based on these findings, coaches appear to hold sports specialization in a higher regard than the broader aspects of player development, illustrating a dichotomized perspective of fundamental movement skills and basketball. Conclusion: The findings suggest there is a need for governing bodies to develop innovative strategies to persuade youth basketball coaches to adopt nonsports-specific movement skills to improve their practice.

19 December 2024 in PLOS ONE
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Journal Article
Open access
MWMark David Williams
Mark David Williams
JAJorge Arede
Jorge Arede
AGAiden Griggs
Aiden Griggs
JMJason Moran
Jason Moran
This study aimed to examine the effects of two different complex training protocols on physical performance in highly-trained youth basketball players. Fourteen adolescent players participated in twice-weekly sessions over eight weeks, following either the Drop Jump protocol (n = 7) or the Tic-tac protocol (n = 7), performing 1–3 sets of 8–9 exercises. Physical performance was assessed before and after the intervention using jumping tests (CMJ, squat, 10–5 hop jumps), change-of-direction speed (5-10-5), sprinting (0–20 meters), and muscular strength (isometric midthigh pull) tests. The intraclass correlation coefficient of within subjects measures was 0.95. Results showed no significant fixed effects for group or time on performance variables (p > 0.05), with greater variance attributed to measurements rather than group differences. The interindividual response to training was highly variable, contingent on the performance outcome. These findings suggest that the parkour-based Tic-tac protocol can be included in strength and conditioning programs for youth basketball players to enhance sport-specific actions. However, to improve physical performance in young team-sport athletes, it is crucial to address the individual needs of each athlete. This includes acknowledging the highly individualised responses to training stimuli.