Nowadays Internet is not only source of knowledge ,data transfer, easy and almost free medium of information exchange but also playing a role of Gym instructor who motivates people to do exercise. Do you not believe me? This is true! According to a study web based exercise programmes are very effective in motivating lazy-bones to be fit . A report published in Monday’s issue of the Archives of Internal Medicine found that 
web-based intervention programs are just as effective as more traditional print-based programs in changing the habits of sedentary adults. The result of the study is based on research performed on nearly 250 healthy, inactive people who were divided into three groups.
Participants were divided into three different programs: tailored Internet, standard Internet and tailored print. The people of the tailored internet group were asked to log on to a website designed by the researchers that included educational materials, tips for adopting and maintaining physical activity, and goal-setting functions. They also had to fill out daily physical activity logs and monthly questionnaires. They could also receive immediate (as fast as possible) feedback when desired.
The links to six publicly-accessible physical activity web sites were given to standard Internet group. The researchers had not given any customized program or feedback to them.
Results of study (After six months):
The tailored Internet group, participants were getting 120 minutes of physical activity each week. 
The tailored print group was getting 112.5 minutes of physical activity each week, on average.
The people of standard Internet based group were getting 90 minutes of physical activity each week.
After one year, the participants of tailored and standard Internet group reported ninety minutes of physical activity per week whereas the people from tailored print group followed 80 minute exercise sessions per week.
The study’s lead author, Bess Marcus, a professor of psychiatry and human behaviour at Brown University’s medical school in Providence, R.I., said in a release,
Because the largest public health benefit in physical activity interventions comes from having populations of sedentary persons become more active rather than already active persons becoming more active, the interventions, if widely implemented, could create substantial public health benefits.
The report says that walking is the most common activity for all participants.
Via