A huge personal investment results in a huge ‘burn-in’. This is probably the first state that needs to be dealt with, before switching to ‘burn-out’. Indeed discussion about the important interaction between the two could lead to the avoidance of ‘burn-out’ through understanding ‘burn-in’. Interestingly, a large body of literature has shown that professionals in the mental heath^([sic]) services seem to be more vulnerable to the ‘burn-in’—‘burn-out’ process.
Source: wiktionary