The warm-up period of a workout is important because

If you warm up first you have less of a risk of tearing a muscle

If you do warmups before you start any type of physical activity and stretch out , you have a less chance of tearing a muscle like they said ^ hope this helps :-)

Nothing will delay it, but drinking some lemon (squeeze 3) would cut it, making it last a few days, but its not good to do that. won't hurt you but the next month will be more cramps.. take some advils with you on the trip