There are things that hold us back, some physical and some mental, and many if not all can be overcome by making a few changes.
#1 biggest mistake is using age as excuse not to work out or eat right.
#2 Not changing what you do when you workout. Easy to get in a rut.
#3 Letting your experience work against you. He explains it very well.
#4 Not focusing on the basics
#5 Not during training that’s for your age.