Exercise and Healthy lifestyle eating can definitely help prevent cancer.
Daily exercise for atleast 30min is suggested. Eating fresh n raw veggies and fruits like berries, watermelon, black grapes, apple, pomegranate, guava, muskmelons,oranges and many more may fight cancer. Almost all fresh veggies, green tea help in prevention of Cancer.
Try and make all these foods a part of your diet to fight cancer and other Diseases.
All the Best!!