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The effect of time of work out on lean muscle mass in selected male individuals.


Bernard Jose D. Cabahug Jr.,
Jan Mel  E. Cahiles,
Wilson Marius C. Go Jr.,
Johnlerry E. Suarez,
Jan Andy D. Gatillo

Related Institution

College of Rehabilitative Sciences – Department of Physical Therapy - Cebu Doctors' University

Publication Information

Publication Type
Thesis Degree
Physical Therapy
Publication Date
October 2014


    The study aimed to determine the effect of time of work out on lean muscle mass in selected male individuals. A quasi-experimental nonequivalent pretest-posttest control group design was used. The study was conducted at Xanadu Fitness Gym located in Basak Mandaue City. Twenty six (26) male individuals who met the inclusion criteria participated in the study and were designated to two (2) groups according to their time of availability. Each group was composed of 13 male individuals. Group A comprised of day time subjects and group B comprised of night time subjects. The researchers made use of the preliminary survey questionnaire to screen the subjects, skinfold caliper to measure lean muscle mass and weighting scale to measure body weight.

     The result shows that pre-treatment lean muscle mass value of group A falls within 102.40 pounds to 124.52 pounds. The group B value falls within 107.85 pounds to 124.15 pounds. Both groups show variation of subject's lean muscle mass. The average difference of pre-treatment lean muscle mass between two groups is 2.54 pounds. At 5 percent level of confidence, the result showed t=0.666 and p>0.05 which means that there is no significant difference on lean muscle mass of both groups. This further implies that the two groups were homogenous. The average difference in pre-treatment and post-treatment measurement in group A is 0.46 pounds and in group B is 1.15 pounds. At 5 percent level of confidence, group A shows a result of z=-2.121 and p0.05 which means that there is no significant difference in post-treatment lean muscle mass between the two groups.

     The study concluded that there was no significant difference in the effect of time of work out on the lean muscle mass on the selected male individuals. Thus, the researchers would like to recommend the following: working out can be done regardless of time of the day to obtain an increase in lean muscle mass and working out using a high intensity training program for three (3) weeks leads to an increase in lean muscle mass. In the interest of future studies, the researchers would like to recommend the following: increase the number of subjects to further accurately quantify the effects of time in increasing lean muscle mass; utilize a specific set of exercises that is intended for all major muscle groups in order to maximize the areas subjected to measurement; increase the duration of the high intensity training program to observe any further changes in an individual's lean muscle mass; and lastly, find out the effect of working out in different altitude in increasing lean muscle mass.


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Cebu Doctors' University - Main Library U9 Ef36cab 2014 Fulltext Print Format

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