The main aim of the present study was to study the psychological wellbeing in relation with physical fitness and study habit (concentration) among the adult aged 18-25 years. In the present study researcher dealt with the data collected through the administration of appropriate tools. A psychological wellbeing questionnaire, concentration questionnaire was used to assess the psychological wellbeing and concentration. The study was conducted on sample of 100 student and youth falling in the age range of 18-25 year. The subject for the study was chosen on random basis from various educational institutes situated in the Raipur and Bilaspur district of Chhattisgarh state. Initially a total sample of 100 college male students would be considered of age 18-25 year out of 100 college students, 50 would be considered from Raipur and 50 from Bilaspur district. The final samples were consist of college student with high and low physical fitness. The collected data was analyzed by applying percentage distribution and ANOVA. The comparative analysis (ANOVA-post hoc - LSD) showed significantly (p < 0.05) differences in psychological wellbeing. The average wellbeing of high physical fitness group was statistically significantly (p < 0.05) higher as compared with that of the average and low physical fitness group. The least wellbeing is witnessed in low physical fitness group. Similarly, average physically fit group showed significantly (p<0.05) lower wellbeing and higher wellbeing than low physically fit groups. In nutshell, it can be said that there might be relationship between physical fitness and psychological wellbeing of human subjects. As function of tribe the comparative analysis (ANOVA) showed significantly (p < 0.05) differences in fitness between the studied groups. The average fitness of tribal group was statistically significantly (p < 0.05) higher as compared with that of the average of non-tribal group. In nutshell, it can be said that the arm strength of the tribal individuals are stronger than non – tribal individuals. In concentration the result of the hyperactivity disorder showed that the more number of studied subjects showed normal (57%) and less number (43%) of subjects experiencing the hyperactivity disorder symptoms. Result clearly indicate significant (p<0.05) difference in the concentration level among the groups. The lowest value is seen in low physical fitness group. The moderate physical fitness group showed highest concentration among the group which indicate significantly better concentraion than that of other groups.