TY - JOUR
T1 - Back squat velocity to assess neuromuscular status of rugby league players following a match
AU - Callaghan, Dean E.
AU - Guy, Joshua H.
AU - Kean, Crystal O.
AU - Scanlan, Aaron T.
AU - Kertesz, Alexander H.M.
AU - Elsworthy, Nathan
N1 - Funding Information:
The authors would like to thank the Mackay Cutters Rugby League Club for their co-operation in the development of this study.
Publisher Copyright:
© 2020 Sports Medicine Australia
PY - 2021/1
Y1 - 2021/1
N2 - Objectives: Back squat mean concentric velocity (MV) and countermovement jump (CMJ) performance were examined in sub-elite rugby league players post-match to monitor changes in neuromuscular status (NMS) from baseline. Relationships between changes in back squat MV and CMJ performance variables were used to compare back squat MV to an established method to monitor NMS. Design: Longitudinal observational design. Methods: 18 male sub-elite rugby league players (mean ± SD, 20.5 ± 2.4 yr; 180.0 ± 6.7 cm; 93.3 ± 11.2 kg) performed 3 repetitions of CMJ and back squat with an individualised, pre-determined load at −2 h (baseline), +30 min, +24 h, and +48 h in relation to a match. Back squat MV, CMJ height, CMJ peak power, and CMJ peak velocity were measured with a linear position transducer. Results: Significant (p < 0.05), small to large decreases (ES = 0.52–1.24) were observed in back squat MV up to +48 h post-match. Significant (p < 0.05), small to moderate decreases (ES = 0.52–0.70) in CMJ height were also observed up to +24 h post-match, returning to baseline at +48 h. CMJ peak power and peak velocity post-match changes were not significant compared to baseline (p > 0.05). Significant positive correlations were found between changes in back squat MV and CMJ height at +30 min (r = 0.59; p = 0.009) and +48 h (r = 0.51; p = 0.03). Conclusions: These findings suggest back squat MV may be a suitable alternative or addition to CMJ testing for monitoring NMS in rugby league players.
AB - Objectives: Back squat mean concentric velocity (MV) and countermovement jump (CMJ) performance were examined in sub-elite rugby league players post-match to monitor changes in neuromuscular status (NMS) from baseline. Relationships between changes in back squat MV and CMJ performance variables were used to compare back squat MV to an established method to monitor NMS. Design: Longitudinal observational design. Methods: 18 male sub-elite rugby league players (mean ± SD, 20.5 ± 2.4 yr; 180.0 ± 6.7 cm; 93.3 ± 11.2 kg) performed 3 repetitions of CMJ and back squat with an individualised, pre-determined load at −2 h (baseline), +30 min, +24 h, and +48 h in relation to a match. Back squat MV, CMJ height, CMJ peak power, and CMJ peak velocity were measured with a linear position transducer. Results: Significant (p < 0.05), small to large decreases (ES = 0.52–1.24) were observed in back squat MV up to +48 h post-match. Significant (p < 0.05), small to moderate decreases (ES = 0.52–0.70) in CMJ height were also observed up to +24 h post-match, returning to baseline at +48 h. CMJ peak power and peak velocity post-match changes were not significant compared to baseline (p > 0.05). Significant positive correlations were found between changes in back squat MV and CMJ height at +30 min (r = 0.59; p = 0.009) and +48 h (r = 0.51; p = 0.03). Conclusions: These findings suggest back squat MV may be a suitable alternative or addition to CMJ testing for monitoring NMS in rugby league players.
KW - Countermovement jump
KW - Mean concentric velocity
KW - Neuromuscular fatigue
KW - Recovery
KW - Team sport
UR - http://www.scopus.com/inward/record.url?scp=85087777812&partnerID=8YFLogxK
U2 - 10.1016/j.jsams.2020.06.006
DO - 10.1016/j.jsams.2020.06.006
M3 - Article
C2 - 32674924
AN - SCOPUS:85087777812
SN - 1440-2440
VL - 24
SP - 36
EP - 40
JO - Journal of Science and Medicine in Sport
JF - Journal of Science and Medicine in Sport
IS - 1
ER -