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Int J Sports Med 2014; 35(14): 1196-1202
DOI: 10.1055/s-0034-1382016
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Muscle Activation and Strength in Squat and Bulgarian Squat on Stable and Unstable Surface

V. Andersen
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
,
M. S. Fimland
2   Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim Norway
3   Hysnes Rehabilitation Center, St. Olavs University Hospital, Trondheim, Norway
,
Ø. Brennset
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
,
L. R. Haslestad
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
,
M. S. Lundteigen
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
,
K. Skalleberg
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
,
A. H. Saeterbakken
1   Faculty of Teacher Education and Sport, Sogn og Fjordane University College, Norway
› Author Affiliations
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Publication History



accepted after revision 24 April 2014

Publication Date:
25 September 2014 (online)

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Abstract

The aim of the study was to compare muscle activity using the same relative resistance in squats and Bulgarian squats on stable and unstable surface. Muscle strength and activity were assessed by 6-repetition maximum and concomitant surface electromyography. A cohort of 15 resistance-trained males performed the exercises on the floor or a foam cushion in randomized order. The muscle activity was greater in biceps femoris (63–77%, p<0.01) and core muscle external obliques (58–62%, p<0.05) for the Bulgarian squat compared to regular squats, but lower for rectus femoris (16–21%, p<0.05). Only Bulgarian squat showed differences concerning the surface, e. g. the unstable surface reduced the activation of erector spinae (10%, p<0.05) and biceps femoris (10%, p<0.05) compared to a stable surface. There were similar activations in the vasti muscles and rectus abdominis between the different exercises (p=0.313–0.995). Unstable surfaces resulted in a load decrement of 7% and 10% compared to stable surfaces (p<0.001). In conclusion, the squat was somewhat favorable for the activation of agonists, whereas Bulgarian squat was advantageous for the antagonist and somewhat for core muscles. Bulgarian- and regular squats complement each other, and it may be useful to include both in a periodized resistance training program.

Key words

EMG - resistance training - core - bilateral - unilateral - instability
 

  • References

  • 1 ACSM . American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Med Sci Sports Exerc 2009; 41: 687-708
    CrossrefPubMedSearch in Google Scholar
  • 2 Anderson K, Behm DG. The impact of instability resistance training on balance and stability. Sports Med 2005; 35: 43-53
    CrossrefPubMedSearch in Google Scholar
  • 3 Anderson K, Behm DG. Trunk muscle activity increases with unstable squat movements. Can J Appl Physiol 2005; 30: 33-45
    CrossrefPubMedSearch in Google Scholar
  • 4 Behm D, Colado JC. The effectiveness of resistance training using unstable surfaces and devices for rehabilitation. Int J Sports Phys Ther 2012; 7: 226-241
    PubMedSearch in Google Scholar
  • 5 Behm DG, Anderson K, Curnew RS. Muscle force and activation under stable and unstable conditions. J Strength Cond Res 2002; 16: 416-422
    CrossrefPubMedSearch in Google Scholar
  • 6 Behm DG, Anderson KG. The role of instability with resistance training. J Strength Cond Res 2006; 20: 716-722
    PubMedSearch in Google Scholar
  • 7 Bruhn S, Kullmann N, Gollhofer A. Combinatory effects of high-intensity-strength training and sensorimotor training on muscle strength. Int J Sports Med 2006; 27: 401-406
    Thieme ConnectPubMedSearch in Google Scholar
  • 8 Chulvi-Medrano I, Garcia-Masso X, Colado JC, Pablos C, de Moraes JA, Fuster MA. Deadlift muscle force and activation under stable and unstable conditions. J Strength Cond Res 2010; 24: 2723-2730
    CrossrefPubMedSearch in Google Scholar
  • 9 Ebben WP, Feldmann CR, Dayne A, Mitsche D, Alexander P, Knetzger KJ. Muscle activation during lower body resistance training. Int J Sports Med 2009; 30: 1-8
    Thieme ConnectPubMedSearch in Google Scholar
  • 10 Farina D. Interpretation of the surface electromyogram in dynamic contractions. Exerc Sport Sci Rev 2006; 34: 121-127
    CrossrefPubMedSearch in Google Scholar
  • 11 Farina D, Merletti R, Enoka RM. The extraction of neural strategies from the surface EMG. J Appl Physiol 2004; 96: 1486-1495
    CrossrefPubMedSearch in Google Scholar
  • 12 Folland JP, Williams AG. The adaptations to strength training: morphological and neurological contributions to increased strength. Sports Med 2007; 37: 145-168
    CrossrefPubMedSearch in Google Scholar
  • 13 Goodman CA, Pearce AJ, Nicholes CJ, Gatt BM, Fairweather IH. No difference in 1RM strength and muscle activation during the barbell chest press on a stable and unstable surface. J Strength Cond Res 2008; 22: 88-94
    CrossrefPubMedSearch in Google Scholar
  • 14 Gorsuch J, Long J, Miller K, Primeau K, Rutledge S, Sossong A, Durocher JJ. The effect of squat depth on multiarticular muscle activation in collegiate cross-country runners. J Strength Cond Res 2013; 27: 2619-2625
    CrossrefPubMedSearch in Google Scholar
  • 15 Hakkinen K, Komi PV. Changes in neuromuscular performance in voluntary and reflex contraction during strength training in man. Int J Sports Med 1983; 4: 282-288
    Thieme ConnectPubMedSearch in Google Scholar
  • 16 Harriss DJ, Atkinson G. Ethical standards in sport and exercise science research: 2014 update. Int J Sports Med 2013; 34: 1025-1028
    Thieme ConnectPubMedSearch in Google Scholar
  • 17 Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. J Electromyogr Kinesiol 2000; 10: 361-374
    CrossrefPubMedSearch in Google Scholar
  • 18 Jones MT, Ambegaonkar JP, Nindl BC, Smith JA, Headley SA. Effects of unilateral and bilateral lower-body heavy resistance exercise on muscle activity and testosterone responses. J Strength Cond Res 2012; 26: 1094-1100
    CrossrefPubMedSearch in Google Scholar
  • 19 Kohler JM, Flanagan SP, Whiting WC. Muscle activation patterns while lifting stable and unstable loads on stable and unstable surfaces. J Strength Cond Res 2010; 24: 313-321
    CrossrefPubMedSearch in Google Scholar
  • 20 Magnussen LH, Strand LI, Skouen JS, Eriksen HR. Long-term follow-up of disability pensioners having musculoskeletal disorders. BMC Public Health 2009; 9: 407
    CrossrefPubMedSearch in Google Scholar
  • 21 Marshall P, Murphy B. Changes in muscle activity and perceived exertion during exercises performed on a swiss ball. Appl Physiol Nutr Metab 2006; 31: 376-383
    CrossrefPubMedSearch in Google Scholar
  • 22 Marshall PW, McEwen M, Robbins DW. Strength and neuromuscular adaptation following one, four, and eight sets of high intensity resistance exercise in trained males. Eur J Appl Physiol 2011; 111: 3007-3016
    CrossrefPubMedSearch in Google Scholar
  • 23 McBride JM, Cormie P, Deane R. Isometric squat force output and muscle activity in stable and unstable conditions. J Strength Cond Res 2006; 20: 915-918
    PubMedSearch in Google Scholar
  • 24 McBride JM, Larkin TR, Dayne AM, Haines TL, Kirby TJ. Effect of absolute and relative loading on muscle activity during stable and unstable squatting. Int J Sports Physiol Perform 2010; 5: 177-183
    PubMedSearch in Google Scholar
  • 25 McCurdy K, O’Kelley E, Kutz M, Langford G, Ernest J, Torres M. Comparison of lower extremity EMG between the 2-leg squat and modified single-leg squat in female athletes. J Sport Rehabil 2010; 19: 57-70
    PubMedSearch in Google Scholar
  • 26 McCurdy KW, Langford GA, Doscher MW, Wiley LP, Mallard KG. The effects of short-term unilateral and bilateral lower-body resistance training on measures of strength and power. J Strength Cond Res 2005; 19: 9-15
    PubMedSearch in Google Scholar
  • 27 Norwood JT, Anderson GS, Gaetz MB, Twist PW. Electromyographic activity of the trunk stabilizers during stable and unstable bench press. J Strength Cond Res 2007; 21: 343-347
    PubMedSearch in Google Scholar
  • 28 Paoli A, Marcolin G, Petrone N. The effect of stance width on the electromyographical activity of eight superficial thigh muscles during back squat with different bar loads. J Strength Cond Res 2009; 23: 246-250
    CrossrefPubMedSearch in Google Scholar
  • 29 Saeterbakken AH, Fimland MS. Muscle activity of the core during bilateral, unilateral, seated and standing resistance exercise. Eur J Appl Physiol 2012; 112: 1671-1678
    CrossrefPubMedSearch in Google Scholar
  • 30 Saeterbakken AH, Fimland MS. Electromyographic activity and 6RM strength in bench press on stable and unstable surfaces. J Strength Cond Res 2013; 27: 1101-1107
    CrossrefPubMedSearch in Google Scholar
  • 31 Saeterbakken AH, Fimland MS. Muscle force output and electromyographic activity in squats with various unstable surfaces. J Strength Cond Res 2013; 27: 130-136
    CrossrefPubMedSearch in Google Scholar
  • 32 Schwanbeck S, Chilibeck PD, Binsted G. A comparison of free weight squat to Smith machine squat using electromyography. J Strength Cond Res 2009; 23: 2588-2591
    CrossrefPubMedSearch in Google Scholar
  • 33 Seger JY, Thorstensson A. Effects of eccentric versus concentric training on thigh muscle strength and EMG. Int J Sports Med 2005; 26: 45-52
    Thieme ConnectPubMedSearch in Google Scholar
  • 34 Tillaar R, Saeterbakken AH, Ettema G. Is the occurrence of the sticking region the result of diminishing potentiation in bench press?. J Sports Sci 2012; 30: 591-599
    CrossrefPubMedSearch in Google Scholar
  • 35 Uribe BP, Coburn JW, Brown LE, Judelson DA, Khamoui AV, Nguyen D. Muscle activation when performing the chest press and shoulder press on a stable bench vs. a Swiss ball. J Strength Cond Res 2010; 24: 1028-1033
    CrossrefPubMedSearch in Google Scholar
  • 36 Wahl MJ, Behm DG. Not all instability training devices enhance muscle activation in highly resistance-trained individuals. J Strength Cond Res 2008; 22: 1360-1370
    CrossrefPubMedSearch in Google Scholar
  • 37 Wernbom M, Augustsson J, Thomee R. The influence of frequency, intensity, volume and mode of strength training on whole muscle cross-sectional area in humans. Sports Med 2007; 37: 225-264
    CrossrefPubMedSearch in Google Scholar
  • 38 Willardson JM, Fontana FE, Bressel E. Effect of surface stability on core muscle activity for dynamic resistance exercises. Int J Sports Physiol Perform 2009; 4: 97-109
    PubMedSearch in Google Scholar