It’s all good an well going to the gym by yourself but when things starting getting in your way like lacking motivation, not knowing how to perform the correct technique and form. A personal trainer is ideal.
A personal trainer can give you that added motivation if it be finishing your last few reps or you just really don’t like exercise and need to be push through the whole session. A personal trainer has expert knowledge an example of myself is 2 years studying the science and anatomy of exercising and 5 years working with all different types of clients.
Another reason why a personal trainer is good is you don’t have to do any thinking for yourself. PT’s should plan everything for your whole session, different exercise, rest times, reps and sets and types of training this also helps to avoid injury as a lot of Injuries in the gym come from back technique and form.