Positive reinforcement involves the addition of a reinforcing stimulus following a behavior that makes it more likely that the behavior will occur again in the future. When a favorable outcome, event, or reward occurs after an action, that particular response or behavior will be strengthened.
For example, if a client finally attempts to perform their mobility warm up on their own without you, turning up 10 mins early to do so and you give a positive well done. The likelihood of this happening again has now increased.
Another example may include:
Coach offers some praise (reinforcing stimulus) after a client completes a set of technically sound back squats (behavior). The client receives a mention on the gym whiteboard (reinforcing stimulus) for every personal best they achieve that month (behavior). The praise reinforces the need for there to be not just good numbers on the bar but the attributes to demonstrate the exercise well with good technique.
Utilize positive reinforcement where appropriate and strengthen the likelihood for your client's actions to reoccur. It can be a great consistency and adherence tool.
During your coaching sessions try using some positive reinforcement. Do this particularly with the things you want to make habitual.