Force-Time Differences between Ballistic and Non-Ballistic Half-Squats

The purpose of this study was to examine the force-time differences between concentric-only half-squats (COHS) performed with ballistic (BAL) or non-ballistic (NBAL) intent across a range of loads. Eighteen resistance-trained men performed either BAL or NBAL COHS at 30%, 50%, 70%, and 90% of their o...

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Bibliographic Details
Main Authors: Timothy J. Suchomel (Author), Christopher B. Taber (Author), Christopher J. Sole (Author), Michael H. Stone (Author)
Format: Book
Published: MDPI AG, 2018-08-01T00:00:00Z.
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001 doaj_6d29c33a463f460bae7fcb8fea29d924
042 |a dc 
100 1 0 |a Timothy J. Suchomel  |e author 
700 1 0 |a Christopher B. Taber  |e author 
700 1 0 |a Christopher J. Sole  |e author 
700 1 0 |a Michael H. Stone  |e author 
245 0 0 |a Force-Time Differences between Ballistic and Non-Ballistic Half-Squats 
260 |b MDPI AG,   |c 2018-08-01T00:00:00Z. 
500 |a 2075-4663 
500 |a 10.3390/sports6030079 
520 |a The purpose of this study was to examine the force-time differences between concentric-only half-squats (COHS) performed with ballistic (BAL) or non-ballistic (NBAL) intent across a range of loads. Eighteen resistance-trained men performed either BAL or NBAL COHS at 30%, 50%, 70%, and 90% of their one repetition maximum (1RM) COHS. Relative peak force (PF) and relative impulse from 0&ndash;50 ms (Imp50), 0&ndash;90 ms (Imp90), 0&ndash;200 ms (Imp200), and 0&ndash;250 ms (Imp250) were compared using a series of 2 &times; 4 (intent &times; load) repeated measures ANOVAs with Bonferroni post hoc tests. Cohen&rsquo;s d effect sizes were calculated to provide measures of practical significance between the BAL and NBAL COHS and each load. BAL COHS produced statistically greater PF than NBAL COHS at 30% (d = 3.37), 50% (d = 2.88), 70% (d = 2.29), and 90% 1RM (d = 1.19) (all p < 0.001). Statistically significant main effect differences were found between load-averaged BAL and NBAL COHS for Imp90 (p = 0.006, d = 0.25), Imp200 (p = 0.001, d = 0.36), and Imp250 (p < 0.001, d = 0.41), but not for Imp50 (p = 0.018, d = 0.21). Considering the greater PF and impulse observed during the BAL condition, performing COHS with BAL intent may provide a favorable training stimulus compared to COHS performed with NBAL intent. 
546 |a EN 
690 |a partial squat 
690 |a intent 
690 |a resistance training 
690 |a strength 
690 |a Sports 
690 |a GV557-1198.995 
655 7 |a article  |2 local 
786 0 |n Sports, Vol 6, Iss 3, p 79 (2018) 
787 0 |n http://www.mdpi.com/2075-4663/6/3/79 
787 0 |n https://doaj.org/toc/2075-4663 
856 4 1 |u https://doaj.org/article/6d29c33a463f460bae7fcb8fea29d924  |z Connect to this object online.