It is often believed that structured exercise performed in a gymnasium or exercise-specific venues is the most suitable that could bring about positive changes to the human body. This notion can often deter individuals from engaging in an unstructured home-based exercise due to a lack of scientific evidence for positive changes to the human body. The present study is aimed at exploring the effectiveness of home-based physical activity and unstructured exercise in improving the physical fitness and health-related markers of insufficiently active young adults. A total of 132 partially young adults were purposely recruited. The participants were instructed to engage in any home-based exercise they deemed fit over five weeks. A paired sample t-test was used to examine the effectiveness of the intervention on the health status of the students with respect to the pre and post-differences in the evaluated health and fitness parameters. There was a significant improvement in the level of flexibility, upper and core muscle strength of the participants p < 0.05. Moreover, 2.9, 2.1 and 2.2% reductions were observed in the weight, BMI as well as waist circumference of the participants respectively. It is then postulated from the study findings that 5 weeks of unstructured exercise and physical activity could be effective in developing certain physical fitness attributes as well as health markers of an individual. Hence, home-based exercise could be an alternative means of keeping fit and healthy. This could be especially beneficial to individuals with busy schedules or who have constraints for visiting traditional fitness centres.