He captioned one of the clips ‘mental strength therapy’ Join the Miguel Delaney: Inside Football newsletter and get behind-the-scenes access and unrivalled insight Join the Miguel Delaney: Inside Football newsletter Join the Miguel Delaney: Inside Football newsletter Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Anthony Joshua has returned to the gym, continuing his recovery from a car crash in Nigeria that killed two