When I lift, I do 15-12-10-8 reps, adding more weight each set. This way, you get the low weight/high rep (for cutting), mixed with the high weight/low rep (for muscle gain). It has always worked the best for me.
Also, on the go, I eat a lot of tuna fish. Make some sandwiches and take them with you if you can. High in protein, and very low in fat. I make mine with Miracle Whip and Relish, and it never gets old...
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