Make your own free website on Tripod.com

                                                         CASE STUDY

Aim of study: 
            To prove that the resisted exercises given in the eccentric mode for quadriceps 
            muscle is more effective and highly specific for increase in muscle girth, when compared
            to concentric mode of resisted exercises.


Apparatus used:
1.	Dead weight of 5 and 7 kgs
2.	Inch tape
3.	Couch

Methodology :

   Subjects :

            Forty male healthy subjects were selected at the age group of 20-23 years.These subjects
            were divided in to two groups-experimental  group of 20 and control group of 20.Each 
            group is divided in to sub-groups.Under each sub-groups 5 subjects were selected.The 
            quadriceps work performed by them are as below.
Sub-group Against With Mode
A
B
C
D
5 Kg. Wt.
5 Kg. Wt.
7 Kg. Wt.
7 Kg. Wt.
40 RM
60 RM
40 RM
60 RM
concentric
concentric
concentric
concentric
E
F
G
H
5 Kg. Wt.
5 Kg. Wt.
7 Kg. Wt.
7 Kg. Wt.
40 RM
60 RM
40 RM
60 RM
Eccentric
Eccentric
Eccentric
Eccentric

     Methods :

          The right quadriceps muscle is taken for study.The subjecct of Control group is made to lie 
          in supine.The right limb is fixed at hip at 90 degrees.The selected weight is tied to the 
          ankle.The subject is asked to contract quadriceps in concentric mode to extend the knee from
          135-0 degrees.Various repetitions are instituted with other subjects in the same group.
                   In Experimental group same position is adopted and the knee is extended to 
          0  degree passively and the subject is instructed to contract the quadriceps eccentricaly 
          with weight to bring the knee from 0-135 degrees. Various repetitions are instituted with 
          other subjects in the same group.

                   Two sessions were conducted per day for 1 month.The girth of quadriceps muscle at
                   mid thigh level for each individual was measured and recorded at the beginning and
                   end of the whole experiment.
Back to contents