The aging process happens during an individual's lifespan. Everybody is involved in this process and none can escape it. Almost half the community where old individuals dwell report daily pain, which mostly concerns pain in muscles and joints. Joint pain often affects functioning, in terms of mobility, functional independence, participation in social activities, as well as quality of life and is among the ten leading causes of disability-adjusted life years in high income countries. Exercise has been known over the years to be of great value to health and as a tool for treatment and rehabilitation. The purpose of this study therefore is to assess the effects of flexion exercise programme on the health related fitness components of selected older adults in Lagos State. The experimental research design was adopted. The population for this study comprised older adults living in the Government owned Old Peoples' home, Lagos State and the sample comprised 20 older adults (age range 66-87yrs) who both volunteered and gave their consent to participate in the study. The participants were placed on a graded flexion exercise programme, three times every week, 30 minutes each session for a period of six weeks. The resting heart rate, resting blood pressure, body weight, body fat, handgrip strength, knee girth and range of motion were determined. The descriptive statistics of mean, standard deviation, graphical illustrations and the inferential statistics of t-test at 0.05 alpha level were used in analysing the data. There were no significant effects on heart rate; blood pressure; body weight; body fat; hand grip strength and knee girth. But there was significant improvement on the range of motion of participants. The study justifies the adoption of flexion exercise programme for improving the range of motion in older adults. The study recommends a graded, moderate to high intensity long-term exercise programme for individuals including the provision of exercise facilities for older adults in Lagos State.