resistance weight training was reported to have a positive effect on the reduction of body 
 fat by increasing muscle tissues ; maintenance of muscular strength and increase of fat - free 
 mass ; and reduction of blood lipid and lipoprotein metabolism , emphasizing the necessity of 
 resistance weight training as an effective method for weight control , controling the 
 interset rest time during weight training can have a significant have a positive effect on 
 the change of blood lipid concentration and body construction1 . likewise , weight training increases bmr , improves insulin reaction , 
 increases bone density or prevents its loss , and prevents the loss of muscle mass and 
 muscular strength resulting from aging , which emphasizes the importance of weight 
 training2 . in addition , weight training 
 is reported to increase muscle strength and transversal area of muscle not only in men , but 
 also in women who are middle age / old aged . from this viewpoint , it is recommendable that an 
 exercise program for the safest and most efficient weight loss should be composed of 
 contents that comprehensively combine aerobic exercise with resistance weight training based 
 on the person s level . even recently conducted precedent studies found that compound 
 training with aerobic exercise and resistance weight training aimed at middle - aged women 
 with obesity had a positive effect on body composition and blood lipids3 , 4 . the study reported 
 the importance of dietary therapy as well as exercise therapy and stated that exercise 
 therapy without considering dietary therapy could not reduce body fat5 . recently , there have been more than a few findings regarding the effect of compound 
 exercises on middle - aged women with obesity who had experienced health risks due to exposure to 
 various adult diseases and illnesses , but the number of studies is still insufficient ; 
 further , more specific and diverse experiments and research are necessary with regard to how 
 dietary exercises and resistance weight training can be mixed into an ideal compound 
 physical activity program that is suitable for a person s own characteristics . the purpose 
 of this study was to investigate the effect of a compound physical activity program on 
 muscular strength in obese women . they were selected based on a body fat 
 rate of over 30% obtained using a bioelectric impedance method . the subjects had not 
 participated in physical activity or training for at least 6 months . they were randomly 
 assigned to two groups , the experimental group , n=20 , and the control , n=20 ( table 1 ) . aerobic physical activity was performed 5 times per week , 
 and anaerobic physical activity was performed every two days ; the exercise program each day 
 was composed of warm - up , the main exercise , and cooldown . the compound physical activity 
 method used to reach the objective of this study was determined based on exercise 
 prescriptions , such as the intensity , frequency , and duration of exercise suggested by the 
 acsm ( 2009 ) after implementing an exercise load test . the type of exercise focused on 
 walking at a quick pace , and the intensity of the exercise focused long periods of at low 
 intensity rather than short periods of exercise at high intensity with the level of hrmax 
 being 4060% . the weight training , as a type of kinetic load exercise , was applied with a composition 
 ( intensity of 4060% of 1rm and 1015 repetitions ) recommended by the acsm for muscle 
 fitness , and circulatory weight training , which was useful for beginners , was also used and 
 was designed to stimulate the glodbal muscles . in regard to exercise methods , exercise were 
 performed with 15 repetiions and 23 sets by each exercise with an intensity of 4060% of 
 1rm , and the subjects trained for 4050 minutes , with a break of 30 seconds between events 
 and 2 minutes between sets . [ maximum muscle strength ( 1 rm ) = ( 1.06  lifted weight ( kg ) ) + 
 ( 0.58  repeat count )  ( 0.20  age )  3.41 ] spss version 16.0 was used to analyze the data . the t - test and analysis of covariance 
 ( ancova ) were used for statistical analyses . chest muscular strength of the control group was 41.39.7 before the treatment and 
 39.99.52 after the treatment , and chest muscular strength of the treatment group was 
 40.411.15 before the treatment and 51.1410.1 after the treatment ( table 2 ) . leg muscular strength of the control group was 83.47.3 before the treatment and 86.68.421 
 after the treatment , and leg muscular strength of the treatment group was 81.78.47 before 
 the treatment and 101.67.51 after the physical activity ( table 3 ) . abdominal muscular strength of the control group was 51.577.27 before the treatment and 
 51.757.6 after the treatment , and abdominal muscular strength of the exercise group was 
 53.279.14 before the treatment and 68.166.16 after the treatment ( table 4 ) . weight training receives a fervent response , and it is a highly appropriate training method 
 for promoting physical strength in men and women of all ages including children . weight 
 training is an physical activity that raises contractible or extensible contraction by using 
 fixed or adjustable resistance and utilizes free weight equipment including barbells or 
 dumbbells , or contractible or adjustable resistance machines . moreover , the effect on muscle 
 strength of weight training has been shown in precedent studies . weight training reportedly 
 results in statistically meaningful increases in muscle strength and muscle endurance 
 meaningfully in statistics6 . a 
 statistically significant increase in muscle strength and endurance was also reported in 
 another study7 . in the present study , weight training was found to enhance isometric muscle function , which 
 hints that there would be various factors relating to this finding . the improvement of 
 muscle strength can come with the increase of muscle size as a priority . if no physical 
 activity is performed for a long time , muscle area and muscle strength decrease rapidly . analysis of 
 the changes in muscles and muscle endurance revealed that training efficiency is influenced 
 by the difference in exercise intensity with regard to motor unit recruitment7,8,9 . the motor unit of fast - twitch muscle fibers contains more muscle fibers than the motor 
 units of slow - twitch muscle fibers . therefore , fast - twitch muscle fibers have an outstanding 
 ability to add more . it was reported that selective recruitment was not determined by the 
 locomotion speed but by the power level required by muscles6 , 10,11,12,13 . therefore , the program provided in this study exhibits a 
 difference in the selective recruitment aspect of muscle fiber , and this phenomenon had an 
 influence on the change in training effect . this indicates that the change in muscle 
 strength and muscle endurance caused by resistance training is critically influenced by 
 exercise intensity .
[ purpose ] the aim of this study was to determine how compound physical activity affects 
 muscular strength of middle - aged obese women . [ subjects ] the research subjects were 
 4050  year - old middle - aged women with excess body fat ( 30% ) . [ methods ] the subjects were 
 randomly assigned to two group , the experimental group and the control group . 
 the 
 experimental group performed two types of exercise programs for 16 weeks . 
 aerobic physical 
 activity was performed 5 times per week , and anaerobic physical activity was performed 
 every two days , and the exercise program each day was composed of a warm - up , the main 
 exercise , and cooldown . 
 the type of exercise focused on walking at a quick pace , and the 
 intensity of the exercise focused on long periods of exercise at low intensity with the 
 level of hrmax being 4060% . 
 the weight training , which was useful for beginners , as a 
 type of kinetic load exercise , was applied with a composition recommended by the acsm for 
 muscle fitness ( intensity of 4060% of 1 rm and 1015 repetitions ) . 
 spss version 16.0 was 
 used to analyze the data by ancova and the t - test . 
 [ results ] the chest , leg , and abdominal 
 strengths were significantly increased in the experimental group , and this indicates that 
 compound physical activity is effective for improvement of muscular strength . [ conclusion ] 
 in conclusion , there were significant differences between groups in terms of muscular 
 strength .