Document Detail

Kinetic comparison of free weight and machine power cleans.
MedLine Citation:
PMID:  18978627     Owner:  NLM     Status:  MEDLINE    
The purpose of this investigation was to compare the kinetic characteristics of the power clean exercise using either free weight or machine resistance. After familiarization, 14 resistance trained men (mean +/- SD; age = 24.9 +/- 6.2 years) participated in two testing sessions. During the initial testing session, one-repetition maximum performance (1RM) was assessed in either the free weight or machine power clean from the midthigh. This was followed by kinetic assessment of either the free weight or the machine power clean at 85% of 1RM. One week after the initial testing session, 1RM performance, as well as the subsequent kinetic evaluation, were performed for the alternate exercise modality. All performance measures were obtained using a computer-interfaced FiTROdyne dynamometer (Fitronic; Bratislava, Slovakia). Maximum strength (1RM) and average power were significantly greater for the free weight condition, whereas peak velocity and average velocity were greater for the machine condition (p < 0.05). Although peak power was not different between modalities, force at peak power (free weights = 1445 +/- 266 N, machine = 1231 +/- 194 N) and velocity at peak power (free weights = 1.77 +/- 0.28 m x s(-1), machine = 2.20 +/- 0.24 m x s(-1)) were different (p < 0.05). It seems that mechanical limitations of the machine modality (i.e., lift trajectory) result in different load capacities that produce different kinetic characteristics for these two lifting modalities.
R Murry Jones; Andrew C Fry; Lawrence W Weiss; Stephen J Kinzey; Christopher A Moore
Related Documents :
11079517 - Evidence of neuromuscular fatigue after prolonged cycling exercise.
10090637 - Human power output during repeated sprint cycle exercise: the influence of thermal stress.
23877057 - Correction of joint angles from kinect for balance exercising and assessment.
11738957 - The influence of geographic variations on the muscular activity in selected sports move...
18948447 - Fluid and electrolyte supplementation after prolonged moderate-intensity exercise enhan...
2588207 - Adverse effect of additional weight on exercise against gravity in patients with chroni...
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  22     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-07     Completed Date:  2009-03-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1785-9     Citation Subset:  IM    
Human Performance Laboratories, The University of Memphis, Memphis, Tennessee, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Multivariate Analysis
Muscle Strength Dynamometer
Resistance Training / instrumentation*,  methods
Weight Lifting / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Closed-kinetic chain upper-body training improves throwing performance of NCAA Division I softball p...
Next Document:  An intensive combined training program modulates physical, physiological, biomotoric, and technical ...