• Users Online: 66
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Current issue Search Archives Submit article Instructions Subscribe Contacts Login 
STUDY PROTOCOL
Year : 2016  |  Volume : 1  |  Issue : 2  |  Page : 71-78

Isometric muscle strength as a predictor of one repetition maximum in healthy adult females: a crossover trial


Department of Physiotherapy, Faculty of Medicine and Health Sciences (FMHS), Universiti Tunku Abdul Rahman, Kajang, Malaysia

Correspondence Address:
Manisha Parai
Department of Physiotherapy, Faculty of Medicine and Health Sciences (FMHS), Universiti Tunku Abdul Rahman, Kajang
Malaysia
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2468-5674.183005

Rights and Permissions

One repetition maximum (1RM) and maximum voluntary contraction (MVC) with a digital dynamometer are popular methods of measuring muscle strength. The types of muscle contraction involved in both are different, 1RM involves isotonic muscle contraction (ITMC) and MVC with a digital dynamometer involves isometric muscle contraction (IMMC). There are several risks involved in measurement of 1RM, such as delayed onset muscle soreness and being unsafe for pathological joints, all of these can be reduced if we use IMMC in measuring muscular strength. Both cannot be equated as they are different types of contraction, therefore the purpose of this study was to compare and find a relationship between 1RM measurement and isometric MVC in healthy females. Twenty-nine young females (mean age = 20.77 ± 1.28 years) without any weight training experience (mean body mass index = 20.43 ± 1.85) volunteered to participate in the study. It was a crossover trial where 48 hours of rest period was given between each measurement technique. Results showed moderate correlations (r = 0.365-0.847) between 1RM and MVC. A simple linear regression analysis revealed a significant estimated regression equation for dominant and non-dominant sides [dominant, Y = 0.391X + 1.472; non-dominant, Y = 0.251X + 2.629 (Y: 1RM, X: Isometric)] with low standard error of estimate (dominant, 0.74; non-dominant, 0.80). Results also showed no significant difference between these derived equations and Brzycki 1RM prediction equation. Both prediction equations can be used interchangeably to predict the muscle strength of a healthy female, and thus IMMC can be used to predict 1RM in healthy females.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed2476    
    Printed128    
    Emailed0    
    PDF Downloaded284    
    Comments [Add]    

Recommend this journal