Cast your mind not to the 50-foot giant squid, but to their smaller, less threatening cousins. If you need oomph for a grueling workout, then snack on this often-forgotten protein source. Just 100 g will give you 30 g of protein and six times the RDA of vitamin B12, well known for its energy-releasing qualities.
"It's also very rich in antioxidant selenium which will mop up the free radical damage incurred during training," says sports nutritionist Matt Lovell. It is slightly high in salt and just 100 g will take up 32 percent of your cholesterol allowance, so stick to having it once or twice per week. It's usually served battered and fried but there is a healthier way to eat it using the recipe here.