having apple empty stomach before Brisk walking- good or bad

Dear ladies

Pls help me out. My husband has habit to take one apple and one banana in the morning in empty stomach. Immediately after that he goes for brisk walking of 1 hr due to some high b.p issues. I hav come across an article which shows that there sh'd b gap between food and walk. I ask him not to take fruits before going for walk, but it is really difficult and he feels very hungry if he goes for walking empty stomach. Pls suggest..is it fine to have one apple and one banana before going for brisk walking in early morning??in this way, is he getting the nutrition from fruit?