Most of us want to be liked. This has implication for Trainers and Coaches. The Trainer should not be as concerned about whether the participant likes them!
Instead trainers should show interest in the participants through most of the usual approaches like; listening, encouraging, acknowledging and also paying attention to special requirements (injuries), events (marathon, wedding), sport related exercises, recognition for supporting the local community or other achievements that might be outside of sessions, remember birthdays… An area of key interest is goals (balance of outcome and behaviour goals) ensuring they are achievable, ensuring you can help them reach the goal, monitoring the progress towards the goal.
Some more useful tips in the full article 🤼👯 https://www.mypersonaltrainerwebsite.com/blog/5-ways-to-make-your-clients-love-you