NDLI: Strength outcomes in fixed versus free-form resistance equipment.

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Strength outcomes in fixed versus free-form resistance equipment.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Spennewyn, Keith C.
Description	Country affiliation: United States Author Affiliation: Spennewyn KC ( Health and Exercise Science Department, Minnesota School of Business/Globe University, Shakopee, Minnesota, USA. kspennewyn@msbcollege.edu)
Abstract	The purpose of this study was to compare measures of strength and balance between subjects using fixed form or free-form resistance training equipment to determine whether there is a difference in strength or balance outcomes. Thirty previously untrained subjects, mean age = 49 (+/-3.7 years), were randomly placed in either a free-form strength group (FF n = 10) utilizing a commercially available free-form plate loaded resistance device, a fixed form strength group (FX n = 10) utilizing a commercially available fixed range selectorized resistance device or a control group (C; n = 10) who did not exercise. All groups were assessed during a pretest (T1) and a posttest (T2). The exercise groups were asked to exercise over a 16-week period, increasing resistance based on a standardized 8-12 repetition protocol. The same muscles were targeted in both exercise groups, all groups were instructed not to change their dietary habits. A one-way ANOVA was used to detect differences among the groups using baseline and end results data. FX group increased strength 57% from baseline while the FF group increased strength 115% from baseline. A statistically significant difference (P = 0.000001) was detected for strength production in the FF over the FX group and (P = 0.0000144) over the training and control groups. Balance improved 49% in the FX versus 245% in the FF groups. Testing revealed a statistically significant difference (P < or = 0.003). The control (C) group did not show significant improvement in either strength or balance. Results of this study indicate a greater improvement in FF over FX in strength (58%), and balance (196%). Additionally, the FX reported increased pain levels while the FF group reported lowered overall pain levels.
File Format	HTM / HTML
ISSN	10648011
Issue Number	1
Volume Number	22
e-ISSN	15334287
Journal	Journal of Strength and Conditioning Research
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2008-01-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Sport Sciences Exercise Physiology Muscle Strength Physical Fitness Weight Lifting Adult Anaerobic Threshold Analysis Of Variance Equipment Design Exercise Tolerance Female Humans Male Middle Aged Muscle Fatigue Muscle, Skeletal Oxygen Consumption Probability Reference Values Sensitivity And Specificity Comparative Study Journal Article Randomized Controlled Trial
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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