To determine the effectiveness of Body Mass Index (BMI) and Testosterone yoga therapy in adult women the random group experimental research was the main goal. Thirty adult women between the ages of 20 and 35 years were randomly chosen using the Chennai random sampling group method for the purpose of study and were split into two groups, I and II, of 15 subjects each. It was hypothesised that the physiological and hormonal variables chosen, such as the Body Mass Index (BMI) and testosterone, will vary substantially from the control group among adult people. Before the start of the training programme, a preliminary evaluation for two classes on Body Mass Index (BMI) and testosterone was carried out. Community I subjects earned 60 minutes of yoga practise, 6 days a week for a cumulative duration of eight weeks. Group II (Control Group) had an active resting place. After the experimental period, the two groups were retested on the same selected dependent variables again. The study of co-variance (ANCOVA) was used to determine the important discrepancies between the experimental group and the control group. The significance test was set at a degree of trust of 0.05. The research findings found that the Intervention Group showed substantial variations between adult women with PCOS compared to the Placebo Group attributable to yoga therapy on selected biochemical and hormonal factors such as Body Mass Index (BMI) and testosterone. The theory was agreed at a confidence level of 0.05. It is also concluded that yoga therapy is effective in preserving a stable body mass index (BMI) and testosterone amount for adult women with PCOS.