Create an environment in which to practice: welcoming friends to run with each other is better you practice alone, it may help you feel better, and create incentives to run.
Create an environment in practice: Invite a friend to go jogging together. It is better you train alone. It may help you feel better and motivating to run with.
The built environment in practice:? To invite friends to run together. It is better you practice alone. It may help you feel good and motivation in the running.