I think it is about finding a class/ group which suits you. Last year I tried anaerobic training at a boot camp which was on uneven ground. Injured my hamstring and pulled out of a 10K. I now join a group many of whom are marathon runners who do 10K run with exercise stops. I have found myself getting stronger since joining the group and got a 10K pb.
I struggle with motivation by myself. I have often gone for runs with other people as it pushes me to run and also forces me to go faster. Go to parkrrun as they tend to be friendly and it inspires and motivates people of all abilities.
I am just under 3 weeks away from a marathon. Got to 31km run on Sunday but struggled since with a stomach bug , no been able to run. Probably feeling about 60 per cent since then. Hoping to get to parkrun Saturday as will have a few days of taking it easy. Wondering if I need to change my training plan or taper as normal.
Looking at some of the best runners they have run negative splits for the second half of marathons. I have only run 2 marathons a lot slower 5 years ago and 2 years ago. Both marathons I faded badly in the second half . I. I presume it is judging not going out to fast ( it is a marathon not a sprint) . My goal is to now try and run a negative split marathon.