Its likely to be a fracture but muscle failure is also possible I think it will be a fracture most likely I may be wrong but I hope I gave a little help
A blood test measuring CK levels can help determine how injured his skeletal muscle is.
Examples of strength training include lifting weights, using resistance bands and doing push-ups, pull-ups and sit-ups. Even everyday activities such as carrying groceries, playing with your kids and gardening can strengthen muscles. One of the best ways to support strength building is good nutrition. They need to eat more more lean meats good fruits and vegetables .