A comparison of catch phase force-time characteristics during clean derivatives from the knee

Comfort, P; Williams, R; Suchomel, TJ; Lake, JP

Abstract

The aim of this study was to compare load-absorption force-time characteristics of the clean from the knee (CK), power clean from the knee (PCK) and clean pull from the knee (CPK). Ten collegiate athletes (age 27.5 ± 4.2 years; height 180.4 ± 6.7 cm; mass 84.4 ± 7.8 kg), performed three repetitions each of the CK, PCK and CPK with 90% of their 1RM power clean on a force platform. The CK load-absorption duration (0.95 ± 0.35 s) was significantly longer compared to the CPK (0.44 ± 0.15 s; p < 0.001, d = 2.53), but not compared to the PCK (0.56 ± 0.11 s; p > 0.05, d = 1.08), with no differences between PCK and CPK (p > 0.05, d = 0.91). The CPK demonstrated the greatest mean force (2039 ± 394 N), which was significantly greater than the PCK (1771 ± 325 N; p = 0.012, d = 0.83), but not significantly different to the CK (1830 ± 331 N; p > 0.05, d = 0.60); CK and PCK were not different (p > 0.05, d = 0.18). Significantly more load-absorption work was performed during the CK (655 ± 276 J) compared to the PCK (288 ± 109 J; d = 1.75, p < 0.001); but not compared to the CPK (518 ± 132 J; d = 0.80, p > 0.05). Additionally, more load-absorption work was performed during the CPK compared to the PCK (d = 1.90, p = 0.032). Inclusion of the catch phase during the CK does not provide any additional stimulus in terms of mean force or work during the load-absorption phase compared to the CPK, while the CPK may be beneficial in training rapid force absorption due to high force and a short duration.

Citation

Comfort, P., Williams, R., Suchomel, T., & Lake, J. (2017). A comparison of catch phase force-time characteristics during clean derivatives from the knee. Journal of Strength and Conditioning Research, 31(7), 1911-1918. https://doi.org/10.1519/JSC.0000000000001660

• Journal Article Type: Article
• Publication Date: Jul 1, 2017
• Deposit Date: Aug 23, 2017
• Publicly Available Date: Jul 1, 2018
• Journal: Journal of Strength and Conditioning Research
• Print ISSN: 1064-8011
• Publisher: Lippincott, Williams & Wilkins
• Volume: 31
• Issue: 7
• Pages: 1911-1918
• DOI: https://doi.org/10.1519/JSC.0000000000001660
• Publisher URL: https://doi.org/10.1519/JSC.0000000000001660
• Related Public URLs: http://journals.lww.com/nsca-jscr/pages/default.aspx