Relationship Between Strength Characteristics and Unweighted and Weighted Vertical Jump Height

Details

• Personal Author:
  Fethke N ; Haff GG ; Kraska JM ; Ramsey MW ; Sands WA ; Stone ME ; Stone MH
• Description:
  Purpose: To investigate the relationship between maximum strength and differences in jump height during weighted and unweighted (body weight) static (SJ) and countermovement jumps (CMJ). Methods: Sixty-three collegiate athletes (mean +/- SD; age= 19.9 +/- 1.3 y; body mass = 72.9 +/- 19.6 kg; height = 172.8 +/- 7.7 cm) performed two trials of the SJ and CMJ with 0 kg and 20 kg on a force plate; and two trials of mid-thigh isometric clean pulls in a custom rack over a force plate (1000-Hz sampling). Jump height (JH) was calculated from fight time. Force-time curve analyses determined the following: isometric peak force (IPF), isometric force (IF) at 50, 90, and 250 ms, and isometric rates of force development (IRFD). Absolute and allometric scaled forces, [absolute force/(body mass0.67)], were used in correlations. Results: IPF, IRFD, F50a, F50, F90, and F250 showed moderate/strong correlations with SJ and CMJ height percent decrease from 0 to 20 kg. IPFa and F250a showed weak/moderate correlations with percent height decrease. Comparing strongest (n = 6) to weakest (n = 6): t tests revealed that stronger athletes (IPFa) performed superior to weaker athletes. Conclusion: Data indicate the ability to produce higher peak and instantaneous forces and IRFD is related to JH and to smaller differences between weighted and unweighted jump heights. Stronger athletes jump higher and show smaller decrements in JH with load. A weighted jump may be a practical method of assessing relative strength levels. [Description provided by NIOSH]
• Subjects:
  Athletes Body Height Body Weight Occupational Health Safety
• Keywords:
  Author Keywords: Strength BMI Body Mass Index Body Weight Force Height Factors Humans Motion Studies Physical Capacity Physical Exercise Physical Fitness Physiological Measurements Physiological Response Rate Of Force Development Sports Medicine Strength Deficit

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• ISSN:
  1555-0265
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; Iowa ; OSHA Region 3 ; OSHA Region 4 ; OSHA Region 7 ; OSHA Region 8 ; Tennessee ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  461-473
• Volume:
  4
• Issue:
  4
• NIOSHTIC Number:
  nn:20063315
• Citation:
  Int J Sports Physiol Perform 2009 Jan; 4(4):461-473
• Contact Point Address:
  Jenna M. Kraska, Center of Excellence for Sport Science and Coach Education, Department of Kinesiology, Leisure, and Sports Science, East Tennessee State University, Johnson City, TN
• Federal Fiscal Year:
  2009
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  International Journal of Sports Physiology and Performance
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e568cf106705204e7a158a6e8f69dbb8f577b02d611a5705cb804de3969671b34eaec0011a6df3839cd63cae9e27ff4353af4d51998b9087080860aa02776b32
• Download URL:
  https://stacks.cdc.gov/view/cdc/226396/cdc_226396_DS1.pdf
• File Type:
  [PDF - 254.24 KB ]