If you are looking for the way for workout period with the biggest result, you should consider about the chock-full protein. I recommend a generation of protein which comes from nature and it is really powerful. It is sardines, This guy is a kind of fish, and you can also absorb it by eating directly, or by supplement for protein

Sardines are a good take-along protein source. Just peel the top off the metal can and munch on them after a workout, but be sure to brush your teeth afterwards. What’s so special about sardines? Each small fish you pop into your mouth has 8 grams of protein and only 70 calories. Sardines are also loaded with healthy omega-3 fats that help to reduce inflammation. That’s a good thing if you’re worried about after-exercise soreness. Enjoy them with whole grain crackers and mustard or toss them on onto a salad or into your next batch of homemade spaghetti sauce. They’re a good break from canned tuna.
sardines can be easily found in high-quality extra-virgin olive oil. More important is their function in making leucine, an amino acid, more effective in its role as the catalyst for protein synthesis. Some research also suggests that omega-3 fats can actually help older people overcome agerelated deficits in anabolism, making omega-3s especially important for older lifters.
Pre-workout snacks should be eaten approximately 1 to1 .5 hours before training. Portion size is important and should be kept to around 4 ounces so that training doesn’t interfere with digestion. Make sure you are properly hydrated; dehydration will keep you from seeing results.
If you are strength training, your pre-workout meal should include caffeine, almonds or avocados, all of which trigger dopamine release. Dopamine is involved in motivation, drive, interest and muscle control and function – and these neurotransmitters can affect athletic performance.
Try wild caught salmon with a handful of almonds, Carpaccio made from grass-fed beef paired with avocado, or 2-3 sardines with a small portion of caviar.
If you want to increase your muscle mass, you should aim to increase your insulin levels before working out. The optimal pre-workout meal should include a serving of lean protein such as fish, turkey, or egg whites along with a complex carbohydrate that is either the same size as the protein
You can see more information in this post
https://wikihomenutrition.com/sardines-health-benefits/ it provides more than function for workout.