EFFECTS OF ROPE ANGLES IN WEIGHTED SLED RUNNING ON ELECTROMYOGRAPHY AND GROUND REACTION FORCE IN FEMALE RUGBY PLAYERS
Main Article Content
Abstract
Abstract Purpose: This research aimed to determine and compare electromyography (EMG), vertical ground reaction force (VGRF) and velocity over 5 meters during a weighted sled running with rope angle was at 30 and 60 degrees. Methods: Fifteen female rugby players, aged between 18-25 years, were recruited from Chulalongkorn University. All subjects began with an unloading sprint over 5 meters with a 2-standing point start. Then, subjects were crossoverrandomized assigned to either a weighted sled running (30% of the body weight) at 30 or 60 degrees. Each subject was asked to repeat each set of weighted sprints 3 times with a 5- minute rest between sprints. Dependent variables were the average velocity (5 m.), VGRF at the 3rd stance, and EMG activity (% Maximum voluntary isotmetric contraction, MVIC). Data were analyzed with oneway repeated ANOVA, followed by Turkey post hoc test. The level of significance was set at p-value ≤ 0.05 Results: The results showed that there significant difference in the average velocity during 5-m sprint among an unloaded sprint and a weight sled with 30 and 60 degree However, there was a trend, although no statistical different, for higher EMG activity and lower vertical ground reaction force in a weight sled with 60 degree compared with 30 degree and unloaded. Conclusion: The present findings indicated that the weighted sled running with a rope angle at 60 degree in female rugby players appears to be effective at the stimulation of muscles studied, with low vertical ground reaction force during a short sprint. Keywords: Weighted
Downloads
Article Details

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
Alcaraz PE, Palao JM, Elvira JL, Linthorne NP.
(2008).Effects of threetypes of resisted
sprint training devices on
the kinematics of sprinting at maximu
m velocity. The Journal of Strength &
Conditioning Research, 22(3):890-7.
doi: 10.1519/JSC.0b013e31816611ea.
Bachero-Mena, B and Gonza´ lez-Badillo, JJ.
(2014). Effects of resisted sprint
training on acceleration with three
different loads accounting for 5, 12.5,
and 20% of body mass. The Journal of
Strength & Conditioning Research,
(10), 2954–2960.
วารสารวิทยาศาตร์การกีฬาและสุขภาพ ปีที่23 ฉบับที่1 (มกราคม – เมษายน 2565) 39
Biscombe, T. and Drewett, P. (2010). Rugby:
Steps to success. Leeds: Human
Kinetics. Charoen krabuanrat (1995).
Technical training speed. (Bangkok:
Department of Sports Science).
Kasetsart University)
Coh M.; Peharec S.; Bacic P.; Kampmiller T.,
(2009). Dynamic factors and
electromyoelectromyographic activity
in a sprint start.Biology of Sport, Vol.
No 2
Cottle C, Carlson LA, Lawrence MA. (2014).
Effects of sled towing on sprint starts.
The Journal of Strength & Conditioning
Research, 28, 1241-1245.
Cronin, J., Hansen, K., Kawamori, N., &
McNair, P. (2008). Effects of weighted
vests and sled towing on sprint
kinematics. Sports Biomechanics /
International Society of Biomechanics
in Sports, 7(2), 160-172.
doi:10.1080/14763140701841381.
Cronin, J.B., and Hansen, K.T. (2005).
Strength and power predictors of
sports speed. The Journal of Strength
& Conditioning Research, 19(2), 349–
Dorn TW., Schache AG, Pandy MG. (2012).
Muscular strategy shift in human
running: dependence of running speed
on hip and ankle muscle performance,
Journal of Experi-mental Biology, 215,
-1956.
Harrison, AJ, and Bourke, G. (2009). The
effect of resisted sprint training on
speed and strength performance in
male rugby players. The Journal of
Strength & Conditioning Research,
(1), 275-283.
Kawamori, N, Newton, RU, Hori, N, and
Nosaka, K. (2014). Effects of weighted
sled towing with heavy versus light
load on sprint acceleration ability. The
Journal of Strength & Conditioning
Research, 28(10), 2738-2745.
Kratky, S, Buchecker, M, Pfusterschmied, J,
Szekely, C, and Mu¨ ller, E. (2016).
Effects of a body-weight supporting
kite on sprint running kinematics in
well-trained sprinters. The Journal of
Strength & Conditioning Research,
(1), 102–108.
Lockie, R.G., Murphy A.J. and Spinks C.D.
(2003). Effects of resisted sled towing
on sprint kinematics in field-sport
athletes. The Journal of Strength &
Conditioning Research,1 7 ( 4 ) , 7 6 0 –
Milanese C., Bertucco M., Zancanaro C.
(2014). The effects of three different
rear knee angles on kinematics in the
sprint start. Biology of Sport, 31, 209-
Paulson, S and Braun, WA. ( 2011). The
influence of parachute-resisted
sprinting on running mechanics in
วารสารวิทยาศาตร์การกีฬาและสุขภาพ ปีที่23 ฉบับที่1 (มกราคม – เมษายน 2565) 40
collegiate track athletes. The Journal
of Strength & Conditioning Research,
(6), 1680–1685.
Seeley, R.R., T.D. Stephens and P. Taste.
(1992). Anatomy & Physiology. 2nd
Edition. Missouri : A Mosby imprint of
Mosby-Year Book, Inc.
Spinks, C.D., Murphy, A.J., Spinks, W.L. and
Lockie, R.G. (2007). The effects of
resisted sprint training on acceleration
performance and kinematics in soccer,
rugby union, and Australian football
players. The Journal of Strength &
Conditioning Research, 21(1), 77-85.
Wellman, AD, Coad, SC, Goulet, GC, and
McLellan, CP. (2016). Quantification of
competitive game demands of NCAA
Division I college football players using
global positioning systems. The
Journal of Strength & Conditioning
Research, 30(1),11–19.
West, DJ, Cunningham, DJ, Bracken, RM,
Bevan, HR, Crewther, BT, Cook, CJ,
and Kilduff, LP. (2013). Effects of
resisted sprint training on acceleration
in professional rugby union players.
The Journal of Strength & Conditioning
Research, 27(4), 1014–1018.